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Dissertations / Theses on the topic 'Fields of Research'

Author: Grafiati

Published: 4 June 2021

Last updated: 31 January 2023

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1

Groth, Randall Howard. "Research activity in major research universities and fields of science." Diss., The University of Arizona, 1990. http://hdl.handle.net/10150/185052.

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The primary purposes of this study were to (1) verify the criteria for selection of variables that are measures of research activity; (2) replicate for 1987 the development of a composite measure of research activity index (RAI) for the top 100 research universities in the United States; (3) cluster the top 100 research universities according to the Carnegie Foundation's classifications and rank each university by its respective RAI within the cluster; (4) evaluate the strengths and weaknesses of the RAI and compare the results to those of previous studies; (5) pilot the development of a compo

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2

Hurdle, Burton G. "Acoustic interference fields in the ocean." Thesis, Open University, 1988. http://oro.open.ac.uk/57051/.

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Two areas of underwater acoustics are investigated: ocean-bottom scattering and acoustic fields in geometrically dispersive sound channels. The purpose is to describe and provide an understanding of the physical mechanisms in these two areas by comparing analyzed results from ocean experiments with theoretical computations. Experiments using directive 19.5-kHz transducers illustrate temporal and spacial behavior of signals scattered from the ocean bottom. The signals fluctuate, as a function of acoustic geometry, in linear relation to source and receiver motion and to signal frequency. Spacial

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3

Looi, V. "Music Perception of Cochlear Implant Users." Thesis, University of Canterbury. Department of Communication Disorders, 2006. http://hdl.handle.net/10092/2200.

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4

Miller, Marina Maria. "The effect of applied fields on crystallisation." Thesis, Brunel University, 2000. http://bura.brunel.ac.uk/handle/2438/9216.

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The thesis provides a background on crystallisation, the effects of applied fields and summarises the techniques used for characterisation and analysis. The study of applied magnetic fields was carried out on three crystallising systems (a) sucrose, (b) lactose and (c) cocoa butter. Both sucrose and lactose were crystallised from aqueous solutions in incubators at 50°C in applied magnetic fields and the resulting crystals compared to the those obtained under zero field conditions. The results for the sucrose study where the magnetic treatment was carried out under static, dynamic pumped and dy

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5

Hymo, John A. "Problems involving relative integral bases for quartic number fields." Diss., Virginia Tech, 1990. http://hdl.handle.net/10919/39404.

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In this dissertation the question of whether or not a relative extension of number fields has a relative integral basis is considered. In Chapters 2 and 3 we use a criteria of Mann to determine when a cyclic quartic field or a pure quartic field has an integral basis over its quadratic subfield. In the final chapter we study the question: if the relative discriminant of an extension K / k is principal, where [K : k] = l such that l is an odd prime and k is either a quadratic or a normal quartic number field, does K / k have an integral basis?<br>Ph. D.

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6

Delmiglio, Catia. "The incidence and phylogenetic analysis of viruses infecting New Zealand's native grasses." Thesis, University of Auckland, 2008. http://hdl.handle.net/2292/3364.

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Grasses form the basis for the meat, dairy, wool and deer industries, which contribute to nearly 50% of New Zealand exports, and are also an important component of natural ecosystems. Worldwide >100 plant viruses infect grass species and even mild and symptomless infections can adversely effect plant populations through reduced reproductive rates and greater susceptibility to environmental extremes. The only previously published study on viruses in New Zealand’s natural grasslands found that cereal viruses have invaded the native grass flora of the South Island. This research provided an exten

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7

Thew, Laurie. "Clarifying leadership: The role of the school principal as an educational leader." Thesis, University of Auckland, 2002. http://wwwlib.umi.com/dissertations/fullcit/3061138.

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This thesis examines the role of primary school principals as they undertake their role as educational leaders. Part One summarises theories about leadership and places principals' educational leadership in context. Leadership is defined as a social process whereby principals blend biography and context to reconcile positivist, systemic requirements and recommendations with appropriate localised, and individualised, expectations and aspirations. Part Two outlines an ethnographic methodology that justifies a process to gather and analyse data on the work of three principal subjects. This mat

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8

Sinnema, Claire. "Teacher Appraisal: Missed Opportunities for Learning." Thesis, University of Auckland, 2005. http://hdl.handle.net/2292/71.

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The improvement of teaching is now recognised to be a key to the sustained improvement of student achievement. Teacher appraisal, a central element of performance management, is intended to improve the quality of teaching (and therefore learning). This thesis examines whether teacher appraisal is achieving this purpose, through three empirical studies. This thesis begins with a discussion of the context of teacher appraisal in relation to education reform of the last two decades. A normative model of teacher appraisal, one that focuses on data-based inquiry into student learning, is outlined,

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9

Clark, Beverley. "Private speech : a window in the self-talk of kindergarten children from diverse language background." Thesis, University of Auckland, 2005. http://hdl.handle.net/2292/81.

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The immense potential of language, for learning, building relationships, as the embodiment of culture, for an understanding of the world and for expressing 'self', is the underlying theme of this thesis. One less apparent aspect of the language of children is their private speech. In this thesis the research questions focus on whether children from diverse language backgrounds attending English-speaking kindergartens use private speech. Further, if so, what is the context, who is present when it is used and is there a response from the person or people? These questions are primarily addressed

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10

Martin, Allan. "Older adulthood, education and social change (Australia, New Zealand)." Thesis, University of Auckland, 2006. http://wwwlib.umi.com/dissertations/fullcit/3205817.

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The outcome of demographics which point to a rapid increase in the number of older adults in the population has been widely debated in the literature. However, it has been examined primarily from the perspective of an unrealistically optimistic or unduly pessimistic view of the future, with few attempts to provide other alternatives. This thesis is structured in three sections. The first backgrounds the context of the research question, the relevant literature, the prospect of gender bias in that literature and the historical development of government policy towards ageing. The second secti

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11

Millward, Pamela. "Organisational learning facilitated by the analysis of student achievement information." Thesis, University of Auckland, 2006. http://hdl.handle.net/2292/274.

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This thesis explores reasons for New Zealand’s problematic tail of literacy underachievement and suggests one way to address the problem, is for schools to operate as learning organizations. A qualitative research design was used to identify elements of organizational learning in the practices of three very different schools identified as improving the students’ learning outcomes. The research methods included semi-structured interviews, team meeting observations, an anonymous questionnaire and document analysis. An analytical framework identifying five elements of organizational learning, dev

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12

Perry, Geoffrey E. "Economic evaluation of active labour market policy in New Zealand 1989 to 1997." Thesis, University of Auckland, 2007. http://hdl.handle.net/2292/525.

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Active labour market programmes are an important component of government labour market policy internationally and in New Zealand. The growth in unemployment, and in particular male and long term unemployment, since the mid 1980's in New Zealand have contributed to the enhanced role of active labour market programmes in government policy. In the early 1990's the New Zealand government introduced a menu of interventions including subsidy, work experience and training programmes. Concomitant with this development has been increased pressure from political, business and social groups to assess the

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13

Tanielu, Lonise Sera. "O le A'oa'oina o le gagana, faitautusi ma le tusitusi i le a'oga a le faifeau: Ekalesia Faapotopotoga Kerisiano Samoa (EFKS) = Literacy education, language, reading and writing in the pastor's school: Congregational Christian Church of Samoa (CCCS)." Thesis, University of Auckland, 2004. http://hdl.handle.net/2292/1209.

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This study is about an educational experience, which encompasses a range of educational knowledge and skills. It is an experience that is relatively unknown in educational research terms. It is also ct comparatively 'secular' educational experience within a 'religious' institution, the Congregational Christian Church of Samoa (CCCS). The Pastor's School (A'oga a le Faifeau) system teaches children to read and write, employing both Palagi and Fa'a Samoa frameworks. The study is also a positive response to the critical and sometimes negative historical treatment of the church and the Fa'a Samoa,

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14

Devine, Nesta. "An Investigation into 'Public Choice' Theory and its Implications for Education in New Zealand." Thesis, University of Auckland, 2000. http://hdl.handle.net/2292/1962.

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'Public Choice Theory' is defined by its proponents as 'the application of economics to politics'. This thesis attempts to describe Public Choice Theory in its component parts and as a coherent and potent contemporary factor in the political and educational scene. The methodologies used are Foucauldian 'genealogy' and 'immanent critique', that is, the theory is examined in its historical context and in terms of its own logic. The process by which this theory has affected the educational situation in New Zealand is examined, and set in the context of the wider application of economics to politi

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15

Limbrick, Elizabeth Anne. "The reading and language development of severely and profoundly deaf children in a total communication environment." Thesis, University of Auckland, 1988. http://hdl.handle.net/2292/1995.

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The purpose of this two year cross-sectional and longitudinal study was to examine the reading and language of severely and profoundly deaf children over two years. The focus was on reading and language achievement, measured by standardized tests and the process of reading demonstrated when engaged in reading prose. The children were the entire population of severely and profoundly deaf, aged from 5 to 10 years at the commencement of the study, who had no other educational handicaps. They were being educated within a Total Communication programme at the Kelston School for Deaf and associated u

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16

Arrow, Alison Wendy. "Potential precursors to the development of phonological awareness in preschool children." Thesis, University of Auckland, 2007. http://hdl.handle.net/2292/2362.

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Phonological awareness is one of the most important metacognitive skills needed for literacy development. However, the relationships between preschool phonological awareness and pre-literacy skills are only just beginning to be examined. An important area is the study of potential precursors to phonological awareness. The current research proposed that phonological awareness develops along a continuum of linguistic awareness beginning with syllables and moving towards the smallest level of the phoneme. In the current research, potential precursors were examined in two studies. The first study

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17

Jesson, Jocelyn Gavin. "The PPTA and the State: from militant professionals to bargaining agent : a study of rational opportunism." Thesis, University of Auckland, 1995. http://hdl.handle.net/2292/2016.

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This thesis using oral historiographic techniques examines the changing role and function of a teachers' union during changes in the nature of a national State which can also be related to changing forms of capitalism. The teachers' union is New Zealand Post-Primary Teachers Association (the secondary school teachers' union) and the period of particular focus is between 1983 and the beginning of 1993. This is the period of a crisis in the New Zealand State during which the character of the national State was moved from what has been described as a 'wage earners' Welfare State towards a more re

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18

Scott, David John 1946. "The Currie Commission and Report on Education in New Zealand 1960-1962." Thesis, University of Auckland, 1996. http://hdl.handle.net/2292/2283.

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This thesis investigates and analyses the Report of the Commission on Education in New Zealand,1962, also known as the 'Currie Report', paying particular attention to the policy process surrounding the written and oral submissions. Views expressed during the submissions and their ideological basis are related to wider power relationships within society. The submissions emanating from outside the Department of Education are revisited as well as the departmental submissions to establish whether there are any grounds to challenge the consensual, liberal interpretations that have been attached to

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19

Peddie, Bill. "Alienated by Evolution: The Educational Implications of Creationist and Social Darwinist Reactions in New Zealand to the Darwinian Theory of Evolution." Thesis, University of Auckland, 1995. http://hdl.handle.net/2292/2286.

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This investigation explores the reactions to Darwinism in the format and informal education of New Zealand society. The subsidiary purpose is to look at some implications for formal education. Many of the reactions have focussed on distortions of the Darwinian theory of evolution with the form of reaction to Darwinism being centred on different views of humankind. The various group interests have caused different aspects of Darwinism to be highlighted particularly when groups feel their interests are under threat. Using aspects of an "HS3" historical survey technique i.e. the history of the pu

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20

Yielder, Jill. "Professional Expertise: A Model for Integration and Change." Thesis, University of Auckland, 2001. http://hdl.handle.net/2292/2340.

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The nature of professional expertise has been widely debated in the literature. However it has been examined primarily from a dichotomy of perspectives - either from an experiential or a cognitive focus, without the attempt to integrate these, and other aspects of expertise, into an integrated and coherent model. This research is structured in two sections. The first part incorporates a philosophical discussion, which advances an integrated model of professional expertise. The second part uses a case study focused on the field of medical imaging to illustrate and refine the model. Ten professi

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21

Watson, Barbara. "Facilitating independent learning early in the first year of school." Thesis, University of Auckland, 1993. http://hdl.handle.net/2292/2438.

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This is a study of a) the nature and incidence of independent learning defined as "knowing how to generate and direct the processes of learning...*(see p.3) in new entrant classroom settings and, b) the nature of the teacher-child interactions associated with such independent learning. Systematic observation was used at school entry and three months later, to identify aspects of independent learning and the associated teacher behaviours. Six categories of child directed acts identified the range of behaviours from which independent learning could be inferred. Each category of teacher behaviour

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22

Annan, Brian. "A theory for schooling improvement: consistency and connectivity to improve instructional practice." Thesis, University of Auckland, 2007. http://hdl.handle.net/2292/2575.

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This thesis investigates the problem of how to speed up the process through which professional educators learn how to significantly improve disadvantaged students’ academic achievement. The problem is addressed through three questions: (i) What are the most effective national and international examples of school improvement? (ii) What is the condition of the evidence base for making claims of effectiveness? (iii) What can be learned about developing and implementing effective school improvement from those national and international examples? The thesis begins by searching international and nat

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23

Mansfield, Janet Elaine. "The arts in the New Zealand curriculum: from policy to practice." Thesis, University of Auckland, 2000. http://hdl.handle.net/2292/2585.

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In this thesis I portray through a history of music and art education in New Zealand the forms knowledge production took in these subject and the discourses within which they were embedded. This enables a more comprehensive understanding of curriculum and unearths connections with what Lyotard (1984) described as 'grand narrative' used to legitimate knowledge claims and practices at certain historical moments. Through such histories we may chart the progress of European civilization within the local context and provide the historical raison d'Ãªtre for the present state of affairs in music and

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24

Zhang, Yiming. "Applications of artificial neural networks (ANNs) in several different materials research fields." Thesis, Queen Mary, University of London, 2010. http://qmro.qmul.ac.uk/xmlui/handle/123456789/362.

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In materials science, the traditional methodological framework is the identification of the composition-processing-structure-property causal pathways that link hierarchical structure to properties. However, all the properties of materials can be derived ultimately from structure and bonding, and so the properties of a material are interrelated to varying degrees. The work presented in this thesis, employed artificial neural networks (ANNs) to explore the correlations of different material properties with several examples in different fields. Those including 1) to verify and quantify known corr

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25

Knutas, Felix. "Personality, Fields of Research and Job Satisfaction : Evidence from a Swedish University." Thesis, Luleå tekniska universitet, Institutionen för hälsa, lärande och teknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-85432.

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With the introduction of personality research, occupational and job satisfaction research has advanced in scale. Evidence from studies within Personality Trait and Work Psychology research strongly suggests there to be connections between not only Neuroticism and job satisfaction rates, but that personality traits also seem to be unevenly distributed across occupations. This report sought to confirm and further explore findings made on Neuroticism and job satisfaction, as well as potential differences in personality traits among researchers in Social Science, Physical Science and Technology. U

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26

Yee, Thomas William. "The Analysis of binary data in quantitative plant ecology." Thesis, University of Auckland, 1993. http://hdl.handle.net/2292/1973.

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The analysis of presence/absence data of plant species by regression analysis is the subject of this thesis. A nonparametric approach is emphasized, and methods which take into account correlations between species are also considered. In particular, generalized additive models (GAMs) are used, and these are applied to species’ responses to greenhouse scenarios and to examine multispecies interactions. Parametric models are used to estimate optimal conditions for the presence of species and to test several niche theory hypotheses. An extension of GAMs called vector GAMs is proposed, and they pr

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27

Korobeinikov, Andrei. "Stability and bifurcation of deterministic infectious disease models." Thesis, University of Auckland, 2001. http://wwwlib.umi.com/dissertations/fullcit/3015611.

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Autonomous deterministic epidemiological models are known to be asymptotically stable. Asymptotic stability of these models contradicts observations. In this thesis we consider some factors which were suggested as able to destabilise the system. We consider discrete-time and continuous-time autonomous epidemiological models. We try to keep our models as simple as possible and investigate the impact of different factors on the system behaviour. Global methods of dynamical systems theory, especially the theory of bifurcations and the direct Lyapunov method are the main tools of our analysis.

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28

Woodgate, Scott Darren. "Studies of osmium and ruthenium complexes with ligands featuring group 14 and 15 donor atoms." Thesis, University of Auckland, 1998. http://hdl.handle.net/2292/531.

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This thesis examines the preparation and chemistry of osmium and ruthenium complexes with ligands featuring the group 14 donor atoms carbon and silicon, and the group l5 donor atom phosphorus. Aryl, alkenyl, and alkynyl complexes of osmium and ruthenium, prepared via mercury reagents, are discussed in Chapter One. 5-Coordinate 2-halophenyl complexes M(C6H4X-2)CI(CE)(PPh3)2 (M = Os; X = C1, Br; E = O, S; M = Os; X = I E = O; M = Ru; X = CI, Br, E = O) were synthesised by reaction of organomercury reagents Hg(C6H4X-2)2 (X = C1, I, Br) with MHC1(CO)(PPh3)3: (M = Os, Ru). Os(C6H4X-2)C1(CO)(PPh3)2

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29

Rustenhoven, Job Jesse. "Asymmetric synthesis of novel anthracyclinones." Thesis, University of Auckland, 1995. http://hdl.handle.net/2292/1903.

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The synthesis of novel C9-halogenated anthracyclinones by Lewis acid promoted cyclisations of ortho-methallyl anthraquinonyl chiral dioxanes has been investigated. Tin tetrachloride-N,N-dimethylformamide promoted cyclisation of the dioxane (30) proceeded with excellent stereoselectivity to give an 82% yield of the diastereomerically pure chlorotetracycle (78). Stronger Lewis acids gave poorer selectivity and boron trifluoride etherate reacted slowly with (30) but with high selectivity to give the diastereomerically pure fluorotetracycle (91) in 58% yield. The presence of a β-methoxy group in t

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30

Lee, Shao Chin. "Isolation and characterisation of two amylin responsive proteins from rat skeletal muscle." Thesis, University of Auckland, 1997. http://hdl.handle.net/2292/1901.

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Two amylin responsive proteins, here designated ARP1 and ARP2, were discovered from rat skeletal muscle through two dimensional gel electrophoresis analysis. ARP1 was detected only in amylin-stimulated muscles where the insulin-stimulated glucose incorporation into glycogen was inhibited. This protein incorporated 32Pi but not [35S]-methionine in the metabolic labeling experiments. Subsequent molecular characterisation revealed that ARP1 was a novel monomeric form (designated form 1) of protein p20, and two other monomeric forms (designated forms 2 and 3 respectively) of protein p20 were also

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31

Park, Jae Hyun. "Synthesis of Natural Products Containing Hydroxylated Pyrrolidines." Thesis, University of Auckland, 2002. http://hdl.handle.net/2292/1921.

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This thesis contains two parts. The first part describes the synthesis of orthogonally protected L-2,3-cis-3,4-trans-DHP 1.44 in eleven steps starting from L-arabinose via double displacement of bis-mesylate 2,8. The second part describes the synthesis of the spiroacetal fragment of the alkaloid broussonetine H. (±)-2-(3-Bromopropyl)-1,7-dioxaspiro[5.5]undecane (3.38) was prepared in nine steps from 1,4- butanediol (1.49), propargyl bromide (3.33) and δ-valerolactone (1.51). Enantioenriched material, namely (2S)-2-(3-bromopropyl)-1,7-dioxaspiro[5.5]undecane (4.2) was synthesized in thirteen st

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32

Salter, David Mark. "The synthesis and reactivity of new ruthenium and osmium silyl complexes." Thesis, University of Auckland, 1993. http://hdl.handle.net/2292/1965.

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The chemistry of transition metal silyl complexes still remains relatively undeveloped despite the recent advances that have been made in this area. This thesis describes the synthesis and reactivity of new ruthenium and osmium silyl complexes. A general survey on the bonding, preparation and reactivity of transition metal silyl complexes is given in chapter one as an introduction to the chemistry discussed in the following chapters. Several reviews relating to transition metal-silicon chemistry have been published, 1-5 and therefore only the major features and more recent developments are hig

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33

Blockley, Craig Andrew. "Quantum interactions of light and atoms: squeezing of light by atoms and cooling of atoms by light." Thesis, University of Auckland, 1993. http://hdl.handle.net/2292/1966.

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Light and atoms couple together via the electromagnetic interaction. The simplest form of this interaction is the electric dipole interaction, and in its quantised form it provides a useful starting point for the investigation of quantum effects in optics. Two examples of quantum noise manipulation of the light field due to interaction with atoms will be presented, as well as an analysis of a simple model for laser cooling of trapped atoms. The first example of quantum noise manipulation is the investigation of a quantum non-demolition measurement scheme based on a three-level atomic system in

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34

Liao, Kecheng. "The AP integral." Thesis, University of Auckland, 1993. http://hdl.handle.net/2292/1969.

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This study attempts to develop the theory surrounding a controlled convergence theorem in the setting of AP integration. First, after a brief review, we spend some time on developing concepts and definitions. We are able to use these concepts to successfully present an initial control convergent theorem. Then we study our conditions more profoundly and find a number of equivalences and inequivalences between them. We are able to weaken some of the standard hypotheses significantly. The Riesz type approach to our integral has been included in our theory. Appropriately enough, we are able to use

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35

Sykes, Bridget Maree. "Reductively triggered internal cyclisation reactions." Thesis, University of Auckland, 1994. http://hdl.handle.net/2292/1977.

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Reductively triggered internal cyclisation reactions have been investigated as a prodrug system for the hypoxia selective release of aromatic nitrogen mustards. The observed pseudo-first-order rate coefficients of cyclisation of several model 2-aminoaryl-acetamides and propanamides have been measured. Cyclisation was observed to be strongly influenced by stereochemistry, whereas electron withdrawal from the amine-bearing ring resulted in a comparatively modest slowing of the rate of cyclisation. Protonation of the leaving group appeared to increase the rate of cyclisation, while changes in 4-s

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36

Bollond, Paul. "Picosecond Pulse Generation and Propagation in Erbium Doped Optical Fibres." Thesis, University of Auckland, 1997. http://hdl.handle.net/2292/1983.

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This thesis is concerned with the generation of picosecond pulses and their propagation through both resonant and non-resonant media. This was achieved by constructing a passively modelocked Erbium doped fibre laser (EDFL) which was used to study pulse propagation through sections of standard communications grade optical fibre, dispersion shifted optical fibre, and also through an Erbium doped fibre amplifier (EDFA) module. The EDFL produced a train of ˜2 psec pulses at 4 MHz, tunable over the erbium gain band ( 1520 - 1570 nm). The laser was constructed from commercially available components

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37

Boniface, Peter James. "Approaches to the synthesis of anthracyclinones." Thesis, University of Auckland, 1985. http://hdl.handle.net/2292/1984.

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The Claisen rearrangement of 1,4-bis(prop-2'-enyloxy)anthraquinone under reducing conditions is investigated. The elaboration of the product of double Claisen rearrangement towards an anthracyclinone skeleton is reported. The insertion of methyl ketone and aldehyde functions into the C-2 and C-3 positions of the anthraquinone skeleton and the subsequent elaboration towards an anthracyclinone skeleton is investigated. Methods for the conversion of hydroxymethylanthraquinones to side chains suitable for anthracyclinone syntheses are reported. A total synthesis of 7,9-didesoxydaunomycinone from 1

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38

Ryan, Glen Richard. "Synthetic studies with diterpenoids." Thesis, University of Auckland, 1988. http://hdl.handle.net/2292/1991.

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Chapter one of this thesis reports an investigation of the synthesis of potential amber odorants from abietic acid. The acid catalysed rearrangement of abietic acid afforded two isomeric dienes the structures of which have been elucidated. Compounds containing the diene functionality were found to be unstable. However, removal of the diene system afforded stable compounds which are suited to further synthetic modification. Although the skeletal features possessed by a class of amber odorants were successfully introduced stereochemical control proved difficult. The stereochemistry of two interm

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39

Mucalo, Michael Roger. "FTIR studies of surface adsorption on noble metal hydrosols." Thesis, University of Auckland, 1991. http://hdl.handle.net/2292/1996.

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Carbon monoxide adsorption, surface speciation and particle size distributions have been studied in platinum, palladium, and rhodium hydrosol systems using Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy and transmission electron microscopy. In transmission electron micrographs of unprotected platinum and palladium hydrosols, particle necklacing believed to arise from sintering during preparation, is apparent. The average particle sizes of all hydrosols studied were in the range of 2 to 12 nm. X-ray photoelectron spectra of the metal hydrosols revealed evidence for (P

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40

Dudley, John Michael. "Coherent transient phenomena in the mode-locked argon laser." Thesis, University of Auckland, 1992. http://hdl.handle.net/2292/2005.

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An investigation has been carried out into the operation of a mode-locked argon laser at a wavelength of 514.5 nm and a repetition rate of 76.8 MHz. The characteristics of the pulses from the laser have been found to depend on the intra-cavity power level in the laser, and at average intra-cavity power levels exceeding 4 W, the pulses from the laser have a duration of typically 35 psec accompanied by a characteristic double-peaked spectrum with a spectral width of 13 GHz These pulse durations are approximately three times shorter than expected based on the inhomogeneously broadened transition

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41

Metzler, Michael Reinhold. "Annulations of diterpenoids via organomanganese and organoiron complexes." Thesis, University of Auckland, 1991. http://hdl.handle.net/2292/2009.

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Chapter One of this Thesis reports an investigation of the synthesis of diterpenoids (as potential ligands for cyclomanganation reactions) from podocarpic acid, and one from dehydroabietic acid. A number of monocyclic aromatic and chalcone derivatives were synthesised to act as model compounds in the subsequent complexation reactions. The second chapter describes successful complexations of the above ligands containing aldehyde, ketone, ester, or oxime groups as directing functionalities to form the resulting tetracarbonylmanganese sigma adducts in moderate to excellent yield. Attempted comple

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42

Grimsdale, Andrew Clive. "Routes to drimanes from podocarpic acid." Thesis, University of Auckland, 1989. http://hdl.handle.net/2292/2072.

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The synthesis and ozonolysis of the 6- and 7-substituted 12-hydroxypodocarpatrienes (26), (86), (90), and (98), as a possible route for the synthesis of drimanes from 12-hydroxypodocarpa-8,11,13-trien-19-oic acid (podocarpic acid) (9) has been investigated. Modification of the aromatic ring of (9) has given 11- and l4-hydroxypodocarpatrienes which were ozonised to give the congeners (31), (34), and (36) of the naturally occurring drimanes confertifolin (6), isodrimenin (7), and winterin (8). The oxidation of a 12,13-dihydroxypodocarpatriene (37) and its dimethyl ether (38) have also been inves

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43

Surman, Peter William John. "Novel Products from Pentachlorocyclopropane: A Synthetic and Structural Investigation." Thesis, University of Auckland, 1996. http://hdl.handle.net/2292/2121.

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Primary and secondary amines react with pentachlorocyclopropane to form a variety of novel products. Amidines, allyl and cyclopropenyl cations are easily reached by these reactions. The 1,1,3,3-tetra-aminoallyl cations of this series can be reversibly protonated at C(2) to give diamidinium ions. Action of KOH on the diamidinium species CH2[C(NHBut)2]2 2+ produces the diamidine CH2[C(NBut)(NHBut)]2 which hydrolyses to the formamidine CH(NBut)(NHBut). Bis- and tris-amino substituted Cyclopropenylium ions are formed by the action of secondary amines on pentachlorocyclopropane. The cations of this

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44

Rho, Jung-hyun. "A novel mucin-desulfating sulfate-6-N-acetylglucosaminidase (sulfoglycosidase) from the anaerobic colonic bacterium Prevotella strain RS2." Thesis, University of Auckland, 2004. http://hdl.handle.net/2292/2275.

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Sulfate removal from sulfomucin is believed to be a rate-limiting step in sulfomucin degradation by bacteria from the digestive tract. A novel sulfomucin-desulfating enzyme has been discovered in the anaerobic bacterium, Prevotella strain RS2, which can grow on colonic mucin as its sole energy source. The enzyme, located in the periplasm, was assayed by measuring p-nitrophenol removal from the model substrate sulfate-6-N-acetylglucosamine-1-p-nitrophenol, sulfate-6-N-acetylglucosamine being the other product. This activity differs from that of sulfatases which remove the sulfate ester group fr

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Zheng, Betty Qilan. "Investigations of ethyl cellulose based grafting copolymers." Thesis, University of Auckland, 2003. http://hdl.handle.net/2292/2285.

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Copolymerisation of ethyl cellulose (EC) with methyl methacrylate (MMA) and vinyl acetate was carried out in solution, using a number of free radical initiators, to form graft copolymers with grafting yields up to 63% and weight average molecular weight about 9 x 104 g mol-1 Graft copolymerisation of MMA and EC appears to involve participation of comonomer charge transfer complexes at the initial stage of reaction, Interaction of EC with the carbonyl group of MMA enhances the electron-accepting ability of EC and promotes the formation of a donor-acceptor complex as matrix, with the resultant g

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46

Carter, Ellen Angharad. "High Current Anodization of Magnesium and Magnesium Alloys." Thesis, University of Auckland, 1996. http://hdl.handle.net/2292/2289.

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High current anodization of magnesium and magnesium alloys Ellen Angharad Carter Pure magnesium and three magnesium alloys containing different amounts of aluminium (2-9%) plus zinc and manganese were anodized with constant current density in sodium hydroxide solution with and without fluoride or phosphate ions. Electric field strengths of resultant anodic films were calculated from galvanostatic transients. These transients showed three characteristic features: linear voltage increase, noisy high voltage signals accompanied by sparking, and sawtooth-like events characterized by instantaneous

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47

Brienne, Stéphane Henri Rudolf. "Spectroscopic investigation of dipyridinium dications and their associated radical monocations." Thesis, University of Auckland, 1992. http://hdl.handle.net/2292/2305.

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A range of compounds related to the diquaternised salts of 2,2'-dtpyridine and 4,4'-dipyridine was studied in the present investigation. The effect of the change in the redox-state of the compounds was determined by vibrational spectroscopic and molecular orbital techniques. The investigation of 2,7-dimethylthieno[2,3-c:5,4-c'] dipyridinium diiodide monohydrate was undertaken by X-ray diffraction, vibrational spectroscopic and molecular-orbital techniques. These investigations showed that the thiophenic portion of the dication exhibited partial aromaticity. On formation of the radical monocati

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Cleverly, Douglas Robert. "Bile salt-stimulated human milk lipase characterisation and kinetic studies." Thesis, University of Auckland, 1992. http://hdl.handle.net/2292/2329.

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Chapter One begins with an introduction to enzymology and leads into a discussion on BSSL beginning with the physical properties and the source of the enzyme. The literature concerning the kinetic properties of BSSL is reviewed, followed by a discussion on how the structure of enzymes influences their catalytic activity and specificity. The use of X-ray crystallographic techniques is addressed as a means of elucidating the three dimensional structure of enzymes. The chemicals, apparatus and standard methodologies used in this present investigation are described in Chapter Two. The means by whi

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Shaw, Patricia. "Tastant interactions with model membranes." Thesis, University of Auckland, 1993. http://hdl.handle.net/2292/2339.

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A wide range of compounds elicit the sweet taste response but currently it is not known what causes this response. In Chapter 3 a number of sweeteners, and representatives of all the taste groups are investigated using NMR spectroscopy. The T1 relaxation times of the tastants were determined in aqueous solution and in solution with liposomes, a model membrane system. The observed changes in T1, values are analysed to determine which regions of the tastants are involved in the interaction with the membrane. In Chapters 4 and 5 an investigation is reported of the interaction of tastants with a l

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Qiao, Lijun. "A Study of Triton X Series Nonionic Surfactant Solutions." Thesis, University of Auckland, 1996. http://hdl.handle.net/2292/2349.

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This work contains some fundamental investigations on Triton X series nonionic surfactants from different aspects. Techniques, such as viscometry, densimetry, diffusion measurement, ultra-violet spectrophotometry, differential scanning calorimetry, surface tension measurement and optical microscopy were employed to acquire the information. Some theoretical analyses were given to the results of these measurements. Triton X surfactants show different properties when they dissolve in different solvents. Aggregation can occur in some solvents, depending on the interactions between solvent and solu

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