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Highly Branched Isoprenoid Alkenes From Diatoms: A Biosynthetic And Life Cycle Investigation, Guillaume Gabriel Masse Jan 2003

Highly Branched Isoprenoid Alkenes From Diatoms: A Biosynthetic And Life Cycle Investigation, Guillaume Gabriel Masse

School of Geography, Earth and Environmental Sciences Theses

In addition to the production of phytol (from chlorophylls) and sterols, a limited number of diatom species are capable of synthesising unusual C25 and C30 highly branched isoprenoid (HBl) alkenes. At the outset of the current investigation, the structures of most C25 and C30 HBIs had been identified. Some environmental factors had been shown to control their production, although a detailed understanding of these remained unclear. In addition, the biological functions of the chemicals remained unknown, and the reasons for their production by some species and not by others, was not understood. Investigations on the distributions of C25 and C30 …

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Speciation Analysis Of Arsenic And Selenium By Hplc And Mass Spectrometry, Sarah Fitzpatrick Jan 2003

Speciation Analysis Of Arsenic And Selenium By Hplc And Mass Spectrometry, Sarah Fitzpatrick

School of Geography, Earth and Environmental Sciences Theses

New methodologies have been developed for the determination of arsenic and selenium species in a variety of environmentally important matrices. A simple liquid chromatographic separation technique based upon mini-column technology was developed to obtain a simultaneous, fast, efficient and reliable separation of relatively toxic from relatively non-toxic arsenic and selenium species. The relatively toxic arsenic and selenium species studied were inorganic Asv, AsIII, SeVI and SeIV. The relatively non-toxic species of arsenic and selenium studied were AsBet, DMA and Se Met. Optimum conditions were found to be the use of a Hamilton PRP X100 12-20 µm anion-exchange resin with column …

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Investigation Of Primary Productivity Along The Atlantic Meridional Transect (50°N To 33°S) Through Fast Repetition Rate Fluorometry, Claudia Yuki Omachi Jan 2003

Investigation Of Primary Productivity Along The Atlantic Meridional Transect (50°N To 33°S) Through Fast Repetition Rate Fluorometry, Claudia Yuki Omachi

School of Geography, Earth and Environmental Sciences Theses

Phytoplankton physiology and primary productivity at basin scales were determined using in situ data from fast repetition rate (FRR) fluorometry. Samples were collected along the Atlantic Meridional Transect cruise 11 (AMTll, September-October 2000), between 50°N and 33°S in the Atlantic Ocean. Because of the large-scale nature of the study, consistent knowledge about oceanographic conditions and the phytoplankton community structure of each sampling station were required. The province analysis was carried out by detecting the regional variations of water mass characteristics in the upper 200 m layer. Temperature versus salinity diagrams were plotted at each station and further analyses of nitrate …

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Uncertainty Contributions To Species Specific Isotope Dilution Analysis, Rob Clough Jan 2003

Uncertainty Contributions To Species Specific Isotope Dilution Analysis, Rob Clough

School of Geography, Earth and Environmental Sciences Theses

Mercury speciation in solid sample matrices has been investigated using high performance liquid chromatography (HPLC) coupled with multicollector sector field (MCSF) and quadrupole (Q) inductively coupled plasma mass spectrometry (ICP-MS) for species specific isotope dilution mass spectrometry (IDMS). 199Hg enriched methylmercurychloride has been synthesised and recovered in the solid form for use as a spike material. The stability of methylmercury during the IDMS procedure was investigated using 199Hg and 13C labelled methylmercury isotopomers and ¹H Nuclear Magnetic Resonance spectroscopy. IntermoIecuJar exchange of the methylmercury halide counter ion was observed, the halide counter ion order of preference was l>Br>Cl. …

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In Situ Measurement Of Trace Metals In Coastal Waters, Kate Ann Howell Jan 2003

In Situ Measurement Of Trace Metals In Coastal Waters, Kate Ann Howell

School of Geography, Earth and Environmental Sciences Theses

This thesis describes the use of in situ and laboratory techniques for monitoring of trace metals and master variables in the environment. Chapter 1 presents a general overview of trace metals, their sources, sinks and roles in estuaries and near coastal zones, their general characteristics and the importance of their behaviour in estuaries. Filtration and commonly used analytical methods for trace metals detemriinations in natural waters are also discussed. Chapter 2 highlights the importance of colloids (in the size range 0.2 to 0.4 \im) to membrane clogging and concludes that cojloids account for a significant part of clogging of membrane …

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Characterisation Of Nitric Oxide Synthase Activity In The Sea Anemone Aiptasia Pallida And An Evaluation Of Responses To Environmental Stress, Clare Emma Morrall Jan 2003

Characterisation Of Nitric Oxide Synthase Activity In The Sea Anemone Aiptasia Pallida And An Evaluation Of Responses To Environmental Stress, Clare Emma Morrall

School of Geography, Earth and Environmental Sciences Theses

Studies were undertaken to investigate the presence of nitric oxide synthase (NOS; E.C. 1.14.13.39) activity in number of cnidarian species from shallow marine subtropical environments. Enzyme activity was assayed by measuring the conversion of 3H L-arginine to 3H L-citrulline (the citrulline assay). This assay was shown to be sufficiently sensitive for studies of this nature but was not optimised for use with cnidarian preparations. As a result, confidence in the accuracy of the generated assay results is limited. NOS activity was nevertheless demonstrated in the sea anemone A. pallida, in the zooxanthellae associated with A. pallida, Symbiodinium spp. and in …

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The Oceanography And Modelling Of The Pontevedra Ria (Nw Spain), Andrew W. Dale Jan 2003

The Oceanography And Modelling Of The Pontevedra Ria (Nw Spain), Andrew W. Dale

School of Geography, Earth and Environmental Sciences Theses

A multidisciplinary study the oceanography of the Pontevedra Ria (NW Spain), including hydrography, biogeochemistiy and biogeochemical modelling, has been performed. The hydrographical variability of the Pontevedra Ria was dependent on freshwater inputs and upwelling of nutrient-rich East North Atlantic Central Water from the shelf. Intrusions of the Poleward Current were also detected during winter. A stratified box model approach predicted that upwelling water fluxes into the ria of 2-4x10³ m³ s-1, of which >30% rises to the surface waters inside the ria. Freshwater residence time varied from ~4-9 d in the central ria and 1-4 d in the internal ria. …

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Sandy Tin Tailings In Malaysia: Characterization And Rehabilitation, David Stuart Tompkins Jan 2003

Sandy Tin Tailings In Malaysia: Characterization And Rehabilitation, David Stuart Tompkins

School of Geography, Earth and Environmental Sciences Theses

Cassiterite extraction in West Malaysia has left a legacy of some 80,000 hectares of nutrient-poor, drought-prone, quartz sandy tailings. Their proximity to urban centres has long made them a target for agricultural and forestry enterprises, and various techniques have been developed to overcome their intractability, including amendment with bulky organic matter and replacement with natural soils. Although reasonably successful, these approaches have often failed to acknowledge that a percentage of the original heavy mineral suite remains in sandy tailings, exerting possible phytotoxic effects and certainly raising concerns about the suitability of sandy tailings for agronomic crop production. To determine the …

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Sediment Transport And Morphodynamics At An Estuary Mouth: A Study Using Coupled Remote Sensing And Numerical Modelling, Eduardo Siegle Jan 2003

Sediment Transport And Morphodynamics At An Estuary Mouth: A Study Using Coupled Remote Sensing And Numerical Modelling, Eduardo Siegle

School of Geography, Earth and Environmental Sciences Theses

The balance of the physical processes that drive the morphodynamics of a complex inlet system is investigated in this work. For this purpose, an innovative technique using coupled video imaging and numerical modelling has been used to study the relative importance of the driving forces that control the sandbar dynamics at the Teignmouth inlet system. The sandbars that form the ebb tidal delta are highly dynamic, leading to a cyclic morphological behaviour. Application of the numerical model (MIKE21 HD, NSW, ST) served two separate functions. The hydrodynamic model has been used for the image processing and, combined with the sediment …

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The Role Of Acute Normovolaemic Haemodilution In Gastro-Intestinal Surgery, Grant Sanders Jan 2003

The Role Of Acute Normovolaemic Haemodilution In Gastro-Intestinal Surgery, Grant Sanders

Other Faculty of Health Theses

Background: Allogeneic transfusion confers a risk to the recipient and the recent introduction of leucocyte depleted blood has increased cost pressure on health resources. Colorectal surgery is a high blood usage field with 43% of all patients in our unit being transfused, over a three year period. Patient perceptions: Despite the risks associated with transfusion, a majority of patients are willing to have an allogeneic transfusion (85%) and think it is safe (89%), which may have implications in the uptake of alternatives available. The effect of bowel preparation Picolax bowel preparation causes significant dehydrating effects which may impair acute normovolaemic …

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The Effect Of Field Boundary Type On The Community Structure, Spatial Distribution And Physiological Condition Of Overwintering Arthropods, With Special Reference To Carabidae And Staphylinidae (Coleoptera), Georgianne J.K. Griffiths Jan 2003

The Effect Of Field Boundary Type On The Community Structure, Spatial Distribution And Physiological Condition Of Overwintering Arthropods, With Special Reference To Carabidae And Staphylinidae (Coleoptera), Georgianne J.K. Griffiths

Other Faculty of Science and Engineering Theses

The potential of different field boundary types in lowland farmland to contribute to arthropod biodiversity and sustainable agriculture was investigated. Field boundaries, categorised according to nationally applicable definitions, were found to represent ecologically differing habitats based on their woody abundance and the frequency of young and mature emergent trees. These habitat characteristics were determining factors in the community structure and composition of overwintering epigeal arthropods. Hedgerows supported the most species rich carabid and staphylinid assemblage. Degraded hedgerow boundaries supported the most equitable carabid community, and provided a refuge for carabid species with poor dispersal power to a greater extent that …

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An Evaluation Of Pumice, Unloaded Clinoptilolite And Nutrient-Loaded Clinoptilolite Zeolites, As Plant Growth Substrates In The Intensive Production Of Long Season Glasshouse Crops, Paul Francis Challinor Jan 2003

An Evaluation Of Pumice, Unloaded Clinoptilolite And Nutrient-Loaded Clinoptilolite Zeolites, As Plant Growth Substrates In The Intensive Production Of Long Season Glasshouse Crops, Paul Francis Challinor

Other Faculty of Science and Engineering Theses

Annual losseso f nitrogen from existing glasshousec rop production substrates ystemsc ould be as high as 600 kg ha 1, using an average of 30% drainwater containing a nitrate-nitrogen concentration of 200 mg 1". The use of nutrient recirculation systems such as nutrient film technique (NFT) helped to reduce nutrient losses to the environment but the commercial area of NFT has decreasedd ue to high initial capital costs, concernso ver diseaset ransmissionw ithin the system and an absence of recent research and development. Most substrate systems rely on the provision of liquid nutrient feeds at every watering. This study examines …

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Benefits Of Fermented Liquid Diets For Sows And Their Piglets, Vlasta Demeckova Jan 2003

Benefits Of Fermented Liquid Diets For Sows And Their Piglets, Vlasta Demeckova

Other Faculty of Science and Engineering Theses

A programme of study was undertaken to asses the antimicrobial and potential immunological properties of fermented liquid feed fed to sows in late gestation period. A liquid feed fermented with Lactobacillus plantarum fed to the pregnant sow in late gestation had the potential to beneficially modify the microflora the lactating sows introduces into the environment, which was consequently reflected in beneficial changes in the gut microflora of their litters. In addition, colostrum from sows fed FLF had a significantly greater mitogenic activity on both intestinal ce11s (79326 ± 3069 CPM) and blood lymphocytes (1903 ± 204 CPM) compared with colostrum …

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Diagonal And Off-Diagonal Magneto-Impedance In Ferromagnetic Microwires And Thin Films, Dmitriy Makhnovskiy Jan 2003

Diagonal And Off-Diagonal Magneto-Impedance In Ferromagnetic Microwires And Thin Films, Dmitriy Makhnovskiy

Other Faculty of Science and Engineering Theses

The discovery of the giant magneto-impedance (GMI) effect in 1994 had a strong impact on the development of micro magnetic sensors. In certain soft magnetic materials, such as composites of amorphous thin wires, the magneto-impedance change (MI ratio) is in the range of 50-100% in the MHz frequency band for external magnetic fields of few Oe. Special thin-film structures have been proposed to provide the MI effect in miniature elements. In the present work, the concept of the magneto-impedance matrix has been elaborated, which enables the explanation of variety of MI field characteristics in wires and films from the common …

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Antenatal Education In The Transition To Motherhood, Suzanne Elizabeth Burley Jan 2003

Antenatal Education In The Transition To Motherhood, Suzanne Elizabeth Burley

Other Faculty of Arts, Humanities and Business Theses

This thesis explores the relationship between antenatal education and the transition to motherhood, focusing on the pre-natal expectations and postnatal experiences of a small sample of first-time mothers in Plymouth. The aims of the study were 1) to investigate the style and content of statutory and voluntary sector antenatal classes in the Plymouth area. 2) To investigate factors affecting non-attendance, including non-attenders' perceptions of them. 3) To examine the role of lay systems of knowledge and support in the transition to motherhood and 4) to investigate the differential impact of different patterns of knowledge and support on the experiences of …

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An Analysis Of The Role Of The Baltic States Ports In The Trans Siberian Railway Market, Anastasia Liliopoulou Jan 2003

An Analysis Of The Role Of The Baltic States Ports In The Trans Siberian Railway Market, Anastasia Liliopoulou

Other Faculty of Arts, Humanities and Business Theses

Almost all the people involved in the shipping industry have come in touch from time to time with what is known as container transit. Some of these people may be working in one way or another in this field, whilst others may be familiar with the meaning and the importance of container transit. This research aims to examine the potential of the Baltic States' ports as transit gateways for the Trans Siberian container market. This work is divided in two parts, the theoretical and the practical. The first part of the study provides a theoretical presentation of the construct under …

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Philosophies Of Colour: Gender And Acculturation, Helen V Andrew Jan 2003

Philosophies Of Colour: Gender And Acculturation, Helen V Andrew

Other Faculty of Arts, Humanities and Business Theses

My hypothesis is that 'Colour' as idea acts as a dynamic in the production of meaning and as such is part of what Le Doeuff (1991: 46-49) argues are deeply held epistemes that structure and govern our ways of thinking. I have dealt with the difficulties attendant on the analysis of a phenomenon as insubstantial as colour (as idea and as precept) by assuming Goethe's (1810: 305-323) concept of the enrobement of colour to objects without also attaching Goethe's theoretical hypothesis of moral associations to colour. Thus I combine four different methodologies to broadly related areas and cloak each in …

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Indentity-In-Motion : The Narrative Duration Of The Dis/Continous Film Moment, Maria Walsh Jan 2003

Indentity-In-Motion : The Narrative Duration Of The Dis/Continous Film Moment, Maria Walsh

Other Faculty of Arts, Humanities and Business Theses

The trajectorv of this thesis is set out like a journey upon which encounters are staged between two films. film theor), and philosophers. such as Slavoj Zizek. Gilles Deletize, and Maurice Merleau-Ponty. An encounter with a moment of image suspension. a cut to the blank screen- in Tacita Dean's film, Disappearance atSea (1996). motivates the beginning of this journey's narrative. My reading of this moment counters the way that suspended film moments have been discussed in terms of non-narrative in 1970s film theory and in the contemporary psychoanalýlic filin theory of Slavoj Zizek. Using Gilles Deleuze's notion of narrativization as …

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The Kinesfield : A Study Of Movement-Based Interactive And Choreographic Art, Gretchen Elizabeth Schiller Jan 2003

The Kinesfield : A Study Of Movement-Based Interactive And Choreographic Art, Gretchen Elizabeth Schiller

Other Faculty of Arts, Humanities and Business Theses

Through the exploration of practice and theory, this thesis aims to elucidate the characteristics of movement-based interactive art and the kinesfield, a term developed during the course of the research to describe the publics' body-medium. Movement-based interactive art is based on choreographed movements of the body, media and specialized technologies which facilitate new forms of participatory movement experience. This emergent art form has initiated new methods of experiencing and presenting dance in the public domain. lt is argued that this leads to new artistic developments which may constitute a paradigm shift of the concept of the body-medium in the field …

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Political Dealignment In Britain : The Local Evidence 1959-1979, Paul James Lambe Jan 2003

Political Dealignment In Britain : The Local Evidence 1959-1979, Paul James Lambe

Other Faculty of Arts, Humanities and Business Theses

This thesis challenges the dominant view that municipal elections tell us practically nothing about the preferences and attitudes of the voter to local issues and events, that municipal elections are no more than national referendums. It suggests that the influence of socio-economic environment and political context and indeed structural factors have hitherto been underestimated. It argues that municipal politics and voting behaviour impact upon parliamentary electoral behaviour and outcomes and thereby the politics of place impinge upon the national electoral level. The thesis employs a multi-disciplinary approach that combines the qualitative research methods of the historian and the quantitative statistical …

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The Materiality Of Text And Body In Painting And Darkroom Processes: An Investigation Through Practice, Deborah Robinson Jan 2003

The Materiality Of Text And Body In Painting And Darkroom Processes: An Investigation Through Practice, Deborah Robinson

Other Faculty of Arts, Humanities and Business Theses

This research study ennploys practice-based strategies through which material processes might be opened to new meaning in relation to the feminine. The purpose of the written research component is to track the material processes constituting a significant part of the research findings. Beginning with historical research into artistic and critical responses to Helen Frankenthaler's painting, Mountains and Sea, I argue that unacknowledged male desire distorted and consequently marginalised reception of her work. I then work with the painting processes innovated by Frankenthaler and relate these to a range of feminist ideas relating to the corporeal, especially those with origins in …

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Children And Family Values : A Critical Appraisal Of 'Family' In Schools, Rowena Alexandra Passy Jan 2003

Children And Family Values : A Critical Appraisal Of 'Family' In Schools, Rowena Alexandra Passy

Other Faculty of Arts, Humanities and Business Theses

Prompted by the Labour government's proposal to introduce education on family relationships into the National Curriculum, this research project was set up to investigate how teachers portrayed 'family' within the classroom and the reactions that children had to the images that were presented. The intention was to highlight any problems that might arise from including 'family' into the formal curriculum. The fieldwork was conducted in three primary and three secondary schools. Two of each of the schools were located in the West Country and the remaining two, in order to give some ethnic and cultural balance to the project, were …

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The Oviposition Behaviour Of The Black Vine Weevil Otiorhynchus Sulcatus (Fabr), Tony John Goodwin Jan 2003

The Oviposition Behaviour Of The Black Vine Weevil Otiorhynchus Sulcatus (Fabr), Tony John Goodwin

Other Faculty of Science and Engineering Theses

Within the constraints of the experiments conducted vine weevil were found to exhibit a strategy of volume of indiscriminate oviposition rather than a strategy of definitives it eselection characteristic of a true oviposition behaviour. A series of experiments was conducted to determine oviposition and host plant interactions under conditions of choice and absence of choice of host plant. It was found that oviposition was greatest for Yew, followed by polyanthus, fushcia, strawberry and (despite the name) was found to be least on vine plants. Variation was attributed to a combination mainly of ground cover and partially quality of host. Oviposition …

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Britain In Europe : A Discourse-Theoretical Approach, Gavin Moorhead Jan 2003

Britain In Europe : A Discourse-Theoretical Approach, Gavin Moorhead

Other Faculty of Arts, Humanities and Business Theses

Previous research upon European integration has observed that Britain has an I awkward partnership' with the rest of the EU. However, these analyses have not addressed how this awkward relationship reflects a difference in political and governmental discourse between Britain and the other Continental European member states. This thesis will examine this divergence. To this end, it applies the discourse-theoretical approach developed by Ernesto Laclau, Chantal Mouffe, and Slavoj Zi2ek. By applying the discourse-theoretical concept of social antagonism, it will seek to explain why these discourses are different and opposed. Possible solutions to this conflict will then be identified and …

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Transmission & The Internet: The Contemporary Response Of A Traditional Musical Community, Griselda Sanderson Jan 2003

Transmission & The Internet: The Contemporary Response Of A Traditional Musical Community, Griselda Sanderson

Other Faculty of Arts, Humanities and Business Theses

This thesis is a study of the performance, interpretation and transmission practices of traditional instrumental musicians in Scotland and Ireland. Extensive original research was undertaken over a period of four years including a survey of current transmission practices amongst traditional musicians from Britain and Ireland. Both preservation and the study of change are vital elements in maintaining a flourishing oral culture. However, my focus is on definition. The study is an attempt to clarify the many contemporary and often conflicting expressions of musical experience that constitute part of the oral tradition in Scotland and Ireland. By examining the work of …

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Creating Emotionally Aware Performance Environments: A Phenomenological Exploration Of Inferred And Invisible Data Space, Richard Mark Povall Jan 2003

Creating Emotionally Aware Performance Environments: A Phenomenological Exploration Of Inferred And Invisible Data Space, Richard Mark Povall

Other Faculty of Arts, Humanities and Business Theses

The practical research undertaken for this thesis - the building of interactive and non-interactive environments for performance - posits a radical recasting of the performing body in physical and digital space. The choreographic and thematic context of the performance work has forced us', as makers, to ask questions about the nature of digital interactivity which in turn feeds the work theoretically, technically and thematically. A computer views (and attempts to interpret) motion information through a video camera, and, by way of a scripting language, converts that information into MIDI' data. As the research has developed, our company has been able …

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From 'Le Cri De La Nature' To 'Pygmalion' : A Study Of Jean-Jacques Rousseau's Philosophy Of Music And Aesthetic And Reform Of Opera, Stephen John Xavier Baysted Jan 2003

From 'Le Cri De La Nature' To 'Pygmalion' : A Study Of Jean-Jacques Rousseau's Philosophy Of Music And Aesthetic And Reform Of Opera, Stephen John Xavier Baysted

Other Faculty of Arts, Humanities and Business Theses

The thesis sets Rousseau's philosophy of music and aesthetic of opera against the wider philosophical backcloth of eighteenth-centuryF rance and in contraposition to the more scopic music-theoredcabl ackdrop,o f which Rameau'sw ritings are takena s a paradigm. The first half of the thesis contends that the philosophy of music is fashioned upon a trinary model which mirrors the philosophy of nature and history. The first sector is an ideal, hypothetical state; the second (the 'fall) is the moment when the ideal state is ruptured, when societal and cultural institutions - and history - commence; the third, is the 'actual state', …

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Not Art: An Action History Of British Underground Cinema, Duncan Reekie Jan 2003

Not Art: An Action History Of British Underground Cinema, Duncan Reekie

Other Faculty of Arts, Humanities and Business Theses

My thesis is both an oppositional history and a (re)definition of British Underground Cinema culture (1959 - 2(02). The historical significance of Underground Cinema has long been ideologically entangled in a mesh of academic typologies and ultra leftist rhetoric, abducting it from those directly involved. The intention of my work is to return definition to the 'object' of study, to write from within. This process involves viewing the history of modem British culture not as a vague monolithic and hierarchic spectrum but rather as a distinct historical conflict between the repressive legitimate Art culture of the bourgeoisie and the radical …

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'The Cost Of Banking On Eastern Promises' An Ethnographic Study Of The Impact Of Changing Bank Strategies On Employees, Susan Jane Child Jan 2003

'The Cost Of Banking On Eastern Promises' An Ethnographic Study Of The Impact Of Changing Bank Strategies On Employees, Susan Jane Child

Other Faculty of Arts, Humanities and Business Theses

Banking is a major employment sector, which has experienced phenomenal growth over the last decade. Following the de-regulation of the financial marketplace and the entry of ‘new players', the industry has suffered from an almost ruinous internal struggle between its traditional, gentlemanly ethos (Clarke and Vincent, 1989) and the enforced adoption of aggressive sales and marketing strategies (Knights and Tinker, 1997). My research has investigated the various ways that ‘change’ (particularly strategic change consequential to the piecemeal adoption of ‘Japanese-style' systems of working and management -'HRM, TQM and lean production) have been met, experienced, negotiated, and to some extent contested, …

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The Coupling Of Perception And Action In Representation, Ed Symes Jan 2003

The Coupling Of Perception And Action In Representation, Ed Symes

School of Psychology Theses

This thesis examines how the objects that we visually perceive in the world are coupled to the actions that we make towards them. For example, a whole hand grasp might be coupled with an object like an apple, but not with an object like a pea. It has been claimed that the coupling of what we see and what we do is not simply associative, but is fundamental to the way the brain represents visual objects. More than association, it is thought that when an object is seen (even if there is no intention to interact with it), there is …

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