All Outputs (2158)

Infrared studies of classical novae and the recurrent nova RS Ophiuchi
Thesis
Callus, C. M. (1987). Infrared studies of classical novae and the recurrent nova RS Ophiuchi

This work is concerned with new observations, within the 1-100um infrared wavelength range, of novae and with models to explain these and existing observations of these objects.
The first half is concerned with the classical novae. Some of these obj... Read More about Infrared studies of classical novae and the recurrent nova RS Ophiuchi.

Dynamic properties of an ammonia maser incorporating a disc resonator
Thesis
Davis, J. A. (1987). Dynamic properties of an ammonia maser incorporating a disc resonator

The oscillation properties of an ammonia maser employing dual molecular beams and a Fabry-Perot type disc resonator are investigated. The molecular beam flux is pulsed by the use of small fuel injection valves. The resulting gas pulses entering the m... Read More about Dynamic properties of an ammonia maser incorporating a disc resonator.

A study of R Coronae Borealis and RV Tauri stars
Thesis
Goldsmith, M. J. (1987). A study of R Coronae Borealis and RV Tauri stars

A variety of aspects of R Coronae Borealis and RV Tauri variables are investigated. Simultaneous optical and infrared observations of both types of star allow stellar and dust shell parameters to be inferred. For R Coronae Borealis stars, light is th... Read More about A study of R Coronae Borealis and RV Tauri stars.

Synthetic approaches to 9-azasteroids
Thesis
(1968). Synthetic approaches to 9-azasteroids

An account is given of total syntheses of azasteroids, syntheses of 4-piperidones, and also syntheses of 2-quinolizidones.
l,2,3,4,5,6-Hexahydro-3-oxo-4aH-benzo[c]quinolizine was prepared and methylation shown to occur in the 2-position which was o... Read More about Synthetic approaches to 9-azasteroids.

Studies of the townsend discharge in caesium vapour and of the formative time lag in mercury vapour
Thesis
Garamoon, A. A. W. M. (1968). Studies of the townsend discharge in caesium vapour and of the formative time lag in mercury vapour

Synthesis and stereochemistry of some 9,10-dihydroanthracenes
Thesis
(1968). Synthesis and stereochemistry of some 9,10-dihydroanthracenes

The geometry of the 9,10-dihydroanthracene system is discussed, leading to an explanation of the relevance of conformational analysis for 9,10-dihydroanthracene derivatives. Synthetic routes to 9,10-dialkyl- 9,10-dihydroanthracene-9,10-diols are revi... Read More about Synthesis and stereochemistry of some 9,10-dihydroanthracenes.

A study of beam masers and alternate gradient focusing of neutral particles
Thesis
(1968). A study of beam masers and alternate gradient focusing of neutral particles

An ammonia beam maser is constructed and its basic characteristics established. An attempt is made to put the theory of state selection and focusing of molecules in a maser in a generalized form so as to include the case of lower state focusing as we... Read More about A study of beam masers and alternate gradient focusing of neutral particles.

X-ray studies of some sulphur-containing organic compounds
Thesis
(1968). X-ray studies of some sulphur-containing organic compounds

Electron spin resonance studies of myoglobin at millimeter wavelengths
Thesis
(1968). Electron spin resonance studies of myoglobin at millimeter wavelengths

The work described in this thesis is concerned with the development of millimeter wave electron spin resonance spectrometers, and the application of such spectrometers to a study of the ferric ion in myoglobin.
Firstly an outline of the basic theor... Read More about Electron spin resonance studies of myoglobin at millimeter wavelengths.

Extended computation of ultrasonic wavenumber in particulate dispersions
Thesis
particulate dispersions

Methods to characterize dispersions in terms of concentration, sizes and size distribution of suspended particles promise significant commercial and industrial utility. Ultrasonic spectroscopy offers practical advantages over existing, mostly off-lin... Read More about Extended computation of ultrasonic wavenumber in particulate dispersions.

A Suzaku survey of iron lines in type 1 Active Galactic Nuclei
Thesis
(2013). A Suzaku survey of iron lines in type 1 Active Galactic Nuclei

Active galactic nuclei (AGN) are some of the most energetic objects which have ever been observed and each of these harbour a supermassive black hole at its centre. By looking at the X-ray emission from these nuclei, information can be gathered regar... Read More about A Suzaku survey of iron lines in type 1 Active Galactic Nuclei.

The stereoselective Pictet-Spengler reaction and studies towards the total synthesis of ajmaline
Thesis
(2013). The stereoselective Pictet-Spengler reaction and studies towards the total synthesis of ajmaline

Due to their extensive and important medicinal properties, the indole alkaloids are an important class of natural products. A key step towards the total synthesis of indole alkaloids is the diastereoselective Pictet-Spengler reaction, which has enabl... Read More about The stereoselective Pictet-Spengler reaction and studies towards the total synthesis of ajmaline.

Steam reforming of methane over alumina supported nickel catalysts: Influence of calcination temperature, gold doping and sulfur addition
Thesis
catalysts: Influence of calcination temperature, gold doping and sulfur addition

Alumina supported nickel and gold-doped nickel catalysts have been investigated for their use as hydrocarbon steam reforming catalysts. The influence of calcination temperature during preparation has been investigated using a variety of techniques in... Read More about Steam reforming of methane over alumina supported nickel catalysts: Influence of calcination temperature, gold doping and sulfur addition.

Carbon burning and hydrodynamic mixing uncertainties in stellar models
Thesis
(2011). Carbon burning and hydrodynamic mixing uncertainties in stellar models

The aim of this thesis is to investigate uncertainties in the input physics of stellar models that are relevant for the evolution of stars and the related nucleosynthesis, in particular the s-process. Nuclear reaction rates and mixing prescriptions i... Read More about Carbon burning and hydrodynamic mixing uncertainties in stellar models.

High-resolution studies of massive young stellar objects in the Magellanic Clouds
Thesis
(2017). High-resolution studies of massive young stellar objects in the Magellanic Clouds

This thesis presents sub-arcsecond resolution observations of massive Young Stellar Objects (YSOs) in two satellite galaxies of the Milky Way, the Magellanic Clouds. With metallicities of »0.5 and »0.2 Z¯ for the Large Magellanic Cloud (LMC) and Smal... Read More about High-resolution studies of massive young stellar objects in the Magellanic Clouds.

Discovery and characterisation of transiting extra-solar planets with the Wide Angle Search for Planets (WASP) survey
Thesis
(2017). Discovery and characterisation of transiting extra-solar planets with the Wide Angle Search for Planets (WASP) survey

In July of 2012 the WASP-South instrument was modified to allow it to collect data on brighter stars. This change was motivated by the dearth of planets known to orbit bright hosts in the southern hemisphere and the depth of study possible for HD2094... Read More about Discovery and characterisation of transiting extra-solar planets with the Wide Angle Search for Planets (WASP) survey.

Catalytic reforming of biogas using nickel based perovskite materials
Thesis
Evans, S. E. (2017). Catalytic reforming of biogas using nickel based perovskite materials

The utilisation of biogas as an energy source or as a feed stock for the chemical industry would help to lower the present wasteful and environmentally unfriendly venting of greenhouse gases to the atmosphere. One obstacle to this becoming a reality... Read More about Catalytic reforming of biogas using nickel based perovskite materials.

Synthesis and properties of amino quinolizinium salts
Thesis
Hough, T. L. (1967). Synthesis and properties of amino quinolizinium salts

Cleavage fracture of glass: being a thesis on an experimental study of the phenomenon of cleavage crack propagation in glass
Thesis
Linger, K. (1967). Cleavage fracture of glass: being a thesis on an experimental study of the phenomenon of cleavage crack propagation in glass

Secondary electron emission properties and characteristic energy losses from some metals
Thesis
Thomas, S. (1967). Secondary electron emission properties and characteristic energy losses from some metals

Secondary electron emission yield and characteristic energy losses from a number of metals have been measured in the present investigation. Owing to the known adverse effects of poor vacuum conditions and any consequent contamination of the surface o... Read More about Secondary electron emission properties and characteristic energy losses from some metals.