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All Outputs (259)

The effects of hydrogen, oxygen and water vapour on the work function and resistance of titanium films
Thesis
The effects of hydrogen, oxygen and water vapour on the work function and resistance of titanium films. https://keele-repository.worktribe.com/output/414665

The changes of work function; ? and resistance; R of titanium films were measured in U.H.V. at room temperature, when- hydrogen, oxygen and water vapour interacted with them. The interaction of hydrogen reduced R by 30% after an initial increase of 1... Read More about The effects of hydrogen, oxygen and water vapour on the work function and resistance of titanium films.

X-ray diffraction and molecular modelbuilding studies on the deoxyribonucleic acid double helix
Thesis
Greenall, R. J. X-ray diffraction and molecular modelbuilding studies on the deoxyribonucleic acid double helix. https://keele-repository.worktribe.com/output/414800

The known nucleic acid conformations and the methods by which they are determined using X-ray fibre diffraction are reviewed and discussed. A new stacking scheme for Watson-Crick base-pairs is described and a left-handed model of B-DNA which incorpor... Read More about X-ray diffraction and molecular modelbuilding studies on the deoxyribonucleic acid double helix.

X-ray fibre diffraction studies on the polymorphism of DNA and its synthetic analogues
Thesis
X-ray fibre diffraction studies on the polymorphism of DNA and its synthetic analogues. https://keele-repository.worktribe.com/output/414908

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.

Studies on the analysis of ecdysteroids and on the seasonal variation of the moulting hormones of the barnacle, Balanus balanoides
Thesis
Studies on the analysis of ecdysteroids and on the seasonal variation of the moulting hormones of the barnacle, Balanus balanoides. https://keele-repository.worktribe.com/output/415014

The separation properties of a number of ecdysteroids were examined. The ecdysteroids themselves were separated by thin layer and reverse phase thin layer chromatography. Trimethylsilyl ethers of the ecdysteroids were prepared by reaction with trimet... Read More about Studies on the analysis of ecdysteroids and on the seasonal variation of the moulting hormones of the barnacle, Balanus balanoides.

Synchrotron x-radiation crystallographic studies of 6-phosphogluconate dehydrogenase from Bacillus stearothermophilus
Thesis
Synchrotron x-radiation crystallographic studies of 6-phosphogluconate dehydrogenase from Bacillus stearothermophilus. https://keele-repository.worktribe.com/output/415016

The synchrotron X-radiation crystallographic study of the enzyme 6-phosphogluconate dehydrogenase (6-phospho-D gluconate NADP+ oxidoreductase (decarboxylating), EC 1.1.1.44) extracted from Bacillus stearothermophilus is reported. This crystallographi... Read More about Synchrotron x-radiation crystallographic studies of 6-phosphogluconate dehydrogenase from Bacillus stearothermophilus.

Novel Approaches To The Fabrication Of Nanoscale Devices
Thesis
Novel Approaches To The Fabrication Of Nanoscale Devices. https://keele-repository.worktribe.com/output/415053

This thesis describes the effects of a post-growth hydrogenation on as-grown samples and device structures based on III-N-V and III-V semiconductor compounds. The spectral response of quantum wells (QWs) or superlattices (SLs) are tuned by the contro... Read More about Novel Approaches To The Fabrication Of Nanoscale Devices.

Laser Writing of the Electronic Activity of Nitrogen and Hydrogen Atoms in Gallium Arsenide
Thesis
Laser Writing of the Electronic Activity of Nitrogen and Hydrogen Atoms in Gallium Arsenide. https://keele-repository.worktribe.com/output/415054

In this study, we use a focussed laser beam to control the electronic activity of N- and H-atoms in a dilute nitride Ga(AsN)/GaAs quantum well (QW). We find that the laser can be used to dissociate N-H complexes in hydrogenated Ga(AsN) thus enabling... Read More about Laser Writing of the Electronic Activity of Nitrogen and Hydrogen Atoms in Gallium Arsenide.

The synthesis and photochemical behaviour of benztropones and related compounds
Thesis
The synthesis and photochemical behaviour of benztropones and related compounds. https://keele-repository.worktribe.com/output/415123

Our aim was to identify the possible factors which controlled the photochemical reactions of benztropones or more widely , annulated tropones,by synthesising benztropones with electron-donating and electron-withdrawing substituents on the benzene rin... Read More about The synthesis and photochemical behaviour of benztropones and related compounds.

Adaptive filters for two to four wire conversion in telephony
Thesis
Adaptive filters for two to four wire conversion in telephony. https://keele-repository.worktribe.com/output/415139

The problem of inaccurate two to four wire conversion is considered, and a conprehensive survey of the transhybrid responses of 1845 subscribers' lines is carried out.
Results on the optimum performance achieved by line matching techniques are prese... Read More about Adaptive filters for two to four wire conversion in telephony.

Micro-chemical investigations of volatile chemicals of some myrmicine ants
Thesis
Micro-chemical investigations of volatile chemicals of some myrmicine ants. https://keele-repository.worktribe.com/output/416987

The volatile chemicals originating from the poison glands, Dufour glands, mandibular glands and postpharyngeal glands of several species of myrmicine ants have been investigated. A number of novel micro-methods were developed and several advances mad... Read More about Micro-chemical investigations of volatile chemicals of some myrmicine ants.

Synthetic studies on farnesene isomers and homologues from the Dufour glands of ants
Thesis
Synthetic studies on farnesene isomers and homologues from the Dufour glands of ants. https://keele-repository.worktribe.com/output/416979

(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.

The application of code conversion techniques to digital audio systems
Thesis
The application of code conversion techniques to digital audio systems. https://keele-repository.worktribe.com/output/416982

The recent development of low cost digital storage has made digital audio systems attractive. However its popularity depends on the development of accurate low cost digital to analogue (D/A) converters. Existing converters require the fabrication of... Read More about The application of code conversion techniques to digital audio systems.

The Synthesis and properties of [1,2,3] triazolo [1,5-a] pyridines
Thesis
The Synthesis and properties of [1,2,3] triazolo [1,5-a] pyridines. https://keele-repository.worktribe.com/output/416874

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.