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Dissertations / Theses on the topic 'Characterisation of molecular clusters'

Author: Grafiati

Published: 4 June 2021

Last updated: 6 February 2022

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1

Bhandari, Manju. "Molecular characterisation of the cluster of genes encoding the botulinum neurotoxin complex." Thesis, University of Reading, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389656.

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2

Cruz, Pedro M. Rodríguez. "Undefined myasthenias : clinical and molecular characterisation and optimised therapy." Thesis, University of Oxford, 2017. http://ora.ox.ac.uk/objects/uuid:90f1b53c-a5ec-4fe3-8589-8ea076fc4cbf.

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Congenital myasthenic syndromes (CMS) are a group of heterogeneous disorders caused by mutations in genes encoding for proteins that are essential for neuromuscular transmission. All CMS share the clinical feature of fatigable muscle weakness. The differential diagnosis of CMS is wide, with a range of diseases going from autoimmune myasthenia gravis to muscle disorders. In this thesis, it was shown that measuring antibodies to clustered acetylcholine receptors (AChRs) by cell-based assay is helpful in the differential diagnosis of CMS. The findings of the current investigations showed that mut

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3

Forysinski, Piotr Wojciech. "A new photoelectron/photoion spectrometer for the characterisation of molecules and clusters using XUV and UV radiation." Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/38189.

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A new photoelectron/photoion spectrometer with a light source tuneable from 17.9 eV to 1.5 eV (bandwidth ≲ 0.7 cm⁻¹) for the characterisation of molecules, clusters and ultrafine aerosol particles is described. The first vibrationally resolved PFI-ZEKE (pulsed field ionisation-zero kinetic energy) photoelectron spectra of acetic acid and difluoromethane are presented, which in the case of acetic acid leads to a revision of earlier values for the adiabatic ionisation energy. For the difluoromethane cation a long-standing mystery regarding its vibrational progression previously observed in low r

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4

Grabarczyk, Daniel Ben. "Molecular characterisation of bacterial proteins that interact with sulfur or nitrogen compounds." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:b6b3e3fd-620f-467d-b063-01311fa7a9a2.

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Many bacteria use inorganic nitrogen and sulfur compounds for energy metabolism. These compounds are often toxic and so bacteria must adapt to survive their deleterious effects. Bacteria use specific proteins in order to metabolise, sense and detoxify these compounds. In this thesis protein interactions with inorganic nitrogen and sulfur compounds are examined at the mechanistic level. Intermediates in the Sox sulfur oxidation pathway are covalently attached to a cysteine on the swinging arm of the substrate carrier protein SoxYZ. An interaction between the Sox pathway enzyme SoxB and the carr

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5

Trindade, Marla. "Studies on carbohydrate metabolism in Bifidobacterium : isolation, characterisation and regulation of a sucrose-utilisation gene cluster in Bifidobacterium lactis." Doctoral thesis, University of Cape Town, 2002. http://hdl.handle.net/11427/4341.

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Bibliography: leaves 167-195.<br>The primary aim of the project was, therefore, to analyse carbohydrate metabolism for the identification of and/or the development of prebiotic substrates, and to provide a molecular characterisation for their utilisation. Several carbohydrates were tested for their ability to support the growth of bifidobacteria as a sole carbohydrate source. The four bifidobacterial strains, B. breve, B. bifidum, B. longum and B. lactis were able to utilise a wide variety of substrates.

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6

Murray, Samantha. "I. Attempted synthesis and characterisation of an electron deficient transition metal complex potentially useful in C-H bond activation, II. Investigations of mesoporous niobium oxide-cobaltocene composites : the first example of superparamagnetism in molecule-based clusters." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ62257.pdf.

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7

James, T. R. "Energy landscapes of molecular clusters." Thesis, University of Cambridge, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.605026.

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Theoretical characterisation of a number of properties of different cluster systems is performed within the energy landscapes formalism. Comparisons with experimental observations are used to provide a critical evaluation of the calculations, where appropriate. Some of the basic concepts and techniques are first discussed. Much of the work has been performed using models that make a rigid-body approximation for the species under investigation. Considerations arising from the corresponding use of curvilinear coordinate systems are therefore presented. Water is the principal focus of the investi

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8

Clucas, J. A. "Synthesis and structural characterisation of transition metal clusters." Thesis, University of Liverpool, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.383429.

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9

Landen, Torquil George Spencer. "Synthesis and characterisation of heterometallic ruthenium carbonyl clusters." Thesis, University of Cambridge, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.627314.

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10

Wallace, William Todd. "Selective molecular adsorption on gold clusters." Diss., Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/27045.

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11

Boatwright, Adrian Lional. "Molecular behaviour in superfluid helium clusters." Thesis, University of Nottingham, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.478961.

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12

Sieradzka, Agnieszka. "Electron attachment to small molecular clusters." Thesis, Open University, 2017. http://oro.open.ac.uk/49656/.

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A large number of secondary electrons with low energies (< 20 eV) is produced during irradiation of biological matter. It is known that such electrons lead to fragmentation of DNA via dissociative electron attachment (DEA). DEA happens via the formation of a resonance (transient negative ion). Studying the properties of the resonances (energy and lifetime) is the first step to describe and understand DEA. Although isolated DNA constituents have been studied broadly, DEA is likely to be affected by the environment. The goal of this research is a theoretical investigation of the influence of the

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13

Anderson, William John. "Molecular characterisation of rhabdomyosarcoma." Thesis, Institute of Cancer Research (University Of London), 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312950.

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14

Owen, A. E. "Synthesis, characterisation and catalytic activity of polymerisable cobalt clusters." Thesis, Swansea University, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.638384.

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The aim of this work is to synthesise and characterise a range of phosphane-substituted polymerisable cobalt clusters and to investigate their utility as hydroformylation catalysts. Chapter one can be thought of as being split into two halves; the first half provides a general introduction to the field of transition metal cluster chemistry, whilst the second focuses on a particular type of cluster, namely alkylidyne tricobalt clusters i.e. clusters containing a Co<sub>3</sub>C core. Chapters two and three describe the reaction of the [Co<sub>3</sub>(m<sub>3</sub>-CR)(CO)<sub>9</sub>] cluster w

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15

Whitton, Alan John. "Preparation and characterisation of mixed bismuth-transition metal clusters." Thesis, University of Cambridge, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293876.

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16

Nair, Nisanth N. "Molecular dynamics investigations of clusters and solids." [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=974372943.

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17

黃柄榕 and Ping-yung Wong. "Molecular clusters on surfaces: a Monte Carlostudy." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1999. http://hub.hku.hk/bib/B31221956.

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18

Sculfort, Sabrina. "D10 -d10 interactions in heterometallic molecular clusters." Strasbourg, 2009. http://www.theses.fr/2009STRA6226.

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La réactivité du métallate [MoCp(CO)3]− vis à vis de complexe de cuivre(I), d’argent(I) et d’or(I) a conduit à une série de complexes hétérométalliques anioniques de formule [M{MoCp(CO)3}2]−(M = Cu(I), Ag(I), et Au(I)). Ces complexes ont été caractérisés par diffraction des rayons X et utilisés comme précurseurs de clusters mixtes à coeurs métalliques hexa- ou octanucléaire pseudo-plans. Ces clusters oligomériques {M[m]}n (M = Cu, n = 3; M = Ag, Au, n = 4) possèdent le même métalloligand pontant [m] = CpMo(CO)3 et ont pu être synthétisés et caractérisés. Le coeur métallique du cluster [Cu3{MoC

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19

Gatchell, Michael. "Molecular Hole Punching : Impulse Driven Reactions in Molecules and Molecular Clusters." Doctoral thesis, Stockholms universitet, Fysikum, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-129523.

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When molecules are excited by photons or energetic particles, they will cool through the emission of photons, electrons, or by fragmenting. Such processes are often thermal as they occur after the excitation energy has been redistributed across all degrees-of-freedom in the system. Collisions with atoms or ions may also lead to ultrafast fragmentation in Rutherford-like scattering processes, where one or several atoms can literally be knocked out of the molecule by the incoming projectile before the energy can be completely redistributed. The resulting fragmentation pathways can in such knocko

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20

Davies, Clare. "Molecular characterisation of Burkholderia pseudomallei." Thesis, University of Plymouth, 2001. http://hdl.handle.net/10026.1/2281.

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A programme of research was carried out to attempt the molecular characterisation of the human and animal pathogen, Burkholderia pseudomallei, the causative agent of melioidosis and the newly described avirulent species, B.thailandensis for comparative purposes. Melioidosis is still little understood, and so the clinical approach to the prevention and control of melioidosis must ultimately rest upon the basic understanding of the causative organism, particularly the pathogenic properties of B.pseudomallei. A range of B.pseudomallei and B.thailandensis isolates were cultured and the extracellul

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21

Hughes, Simon Michael. "Molecular characterisation of avian chemokines." Thesis, University of Reading, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.394177.

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22

Waugh, Elspeth Margaret. "Molecular characterisation of canine lymphoma." Thesis, University of Glasgow, 2015. http://theses.gla.ac.uk/6496/.

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Lymphoma is the most common haematopoietic malignancy of dogs, but little is known about its aetiology and pathogenesis. Canine lymphoma is composed of a clinically heterogeneous group of tumours, as in human non-Hodgkin lymphoma (hNHL), which shares many similarities with the canine disease. In humans, lymphoma is classified into many different subtypes, each with its own clinicopathological characteristics, prognosis, and in many cases, treatment regime. In dogs, diagnosis is often rudimentary, and many cases are not routinely or robustly subtyped. This has hampered efforts to develop accura

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23

Myles, Alison D. "Molecular characterisation of Ureaplasma urealyticum." Thesis, University of St Andrews, 1990. http://hdl.handle.net/10023/14145.

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Monoclonal antibodies (Mabs) raised against Ureaplasma urealyticum (serotype 8) revealed the presence of three membrane antigens. One major surface antigen of apparent molecular mass 96 kDa, shown to express four distinct epitopes, was found to be serotype-8 specific. Thus, Mabs raised against this polypeptide will unequivocally differentiate serotype 8 from the other serotypes of human origin. The binding of antibodies to this polypeptide partially suppressed the growth of the organisms. Membrane expressed antigenic polypeptides of apparent molecular masses 16 kDa and 17 kDa were expressed by

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24

Ferguson, Elaine D. "Molecular characterisation of ovine CD1." Thesis, University of Edinburgh, 1994. http://hdl.handle.net/1842/28006.

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The CD1 molecules are a family of β<SUB>2</SUB>-microglobulin-associated glycoproteins with strong structural homology, but weaker sequence homology, to the MHC class I antigens. In contrast to the classical class I antigens, CD1 molecules exhibit restricted tissue expression (cortical thymocytes, dendritic cells, a subset of B cells and some intestinal epithelial cells), and are nonpolymorphic. Five CD1 genes have been identified in humans , two in the mouse and several in other mammalian species (Calabi et al, 1991). CD1 expression has also been detected by immunohistological techniques in t

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25

Hampson, Brian. "Characterisation of new molecular sieves." Thesis, University of Edinburgh, 1991. http://hdl.handle.net/1842/14976.

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A general introduction to zeolites and aluminophosphate based molecular sieves is followed by a more detailed review of EU-1 and AlPOj-S, the two molecular sieves studied in this work. The synthesis and characterisation of these molecular sieves is described. The characterisation techniques gave details of the framework structure and composition, surface area, and morphology. A time study of the crystallisation of AlPO4-5 from an aluminophosphate gel containing two organic templates showed the formation of a hydrate phase before the AlPO4-5 phase, the change in pH during hydrothermal crystalli

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26

Ollerenshaw, T. J. "Synthesis and characterisation of iron-sulphur clusters of biological interest." Thesis, University of Manchester, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376138.

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27

Mikaberidze, Alexey. "Atomic and molecular clusters in intense laser pulses." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-71087.

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We have investigated processes of ionization, energy absorption and subsequent explosion of atomic and molecular clusters under intense laser illumination using numerical as well as analytical methods. In particular, we focused on the response of composite clusters, those consisting of different atomic elements, to intense light pulses. Another major theme is the effect of the molecular structure of clusters on their Coulomb explosion. The action of intense laser pulses on clusters leads to fundamental, irreversible changes: they turn almost instantaneously into nanoplasmas and subsequently d

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28

Yin, Shuangye. "Ferroelectric and Ferromagnetic Alloy Clusters in Molecular Beams." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/11463.

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Ferroelectric and ferromagnetic alloy clusters are produced and studied in molecular beams. Nb clusters doped with 1-3 impurity atoms are ferroelectric with low transition temperatures. The alloy clusters with an even number of valence electrons have larger dipole moments than those with odd number of valence electrons. The ferroelectricity is suppressed by magnetic impurities or thermal excitations, and is enhanced by Au and Al doping. The observations strongly suggest that electron-pairing interactions exist in Nb clusters, which indicates Cooper pairing in clusters. The magnetic moments of

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29

McLaughlin, Dean E. "Star formation in molecular clouds and globular clusters." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ30104.pdf.

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30

Kilmartin, J. P. "Molecular gold clusters as precursors to heterogeneous catalysts." Thesis, University College London (University of London), 2010. http://discovery.ucl.ac.uk/471120/.

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This work of this thesis covers a number of different aspects of chemistry. Initially, the relationship between the number of atoms at the core of molecular clusters of gold and the steric bulk of the stabilising phosphine ligands is explored. A range of gold clusters was prepared through the use of increasingly bulky phosphine ligands. Theses clusters were characterised using a number of techniques to gain an insight into their structures. Catalysis chemistry was investigated by using the clusters to synthesise heterogeneous catalysts. The effect of varying the loading and calcination tempera

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31

Drake, C. Rachel. "Molecular studies of Escherichia coli capsule gene clusters." Thesis, University of Leicester, 1991. http://hdl.handle.net/2381/35353.

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Molecular studies of Escherichia coli capsule gene clusters C. Rachel Drake Escherichia coli can produce a large number (over 70) of structurally distinct capsular polysaccharide (K antigens) which have previously been divided into two groups. Group II K antigens are encoded by kps near serA. The kps genes are homologous between group II capsule gene clusters which encode chemically distinct K antigens. Genes encoding the K4 antigen (group II), an unusual substituted polymer (a fructo-sylated chondroitin), were cloned and expressed in E. coli K-12 and shown to contain the group II kps determin

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32

Wong, Ping-yung. "Molecular clusters on surfaces : a Monte Carlo study /." Hong Kong : University of Hong Kong, 1999. http://sunzi.lib.hku.hk/hkuto/record.jsp?B20566694.

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33

Sponseller, Daniel Ray. "Molecular Dynamics Study of Polymers and Atomic Clusters." Thesis, George Mason University, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10685723.

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<p> This dissertation contains investigations based on Molecular Dynamics (MD) of a variety of systems, from small atomic clusters to polymers in solution and in their condensed phases. The overall research is divided in three parts. First, I tested a new thermostat in the literature on the thermal equilibration of a small cluster of Lennard-Jones (LJ) atoms. The proposed thermostat is a Hamiltonian thermostat based on a logarithmic oscillator with the outstanding property that the mean value of its kinetic energy is constant independent of the mass and energy. I inspected several weak-couplin

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34

He, Dongsheng. "Quantitative scanning transmission electron microscopy characterisation of size-selected gold clusters." Thesis, University of Birmingham, 2014. http://etheses.bham.ac.uk//id/eprint/4743/.

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This thesis presents a systematic study on the three-dimensional atomic structures of the size-selected gold (Au) using aberration-corrected scanning transmission electron microscopy (STEM), fitted with a high angle annular dark field (HAADF) detector. The work involves experimental quantification of the microscope, HAADF-STEM image modeling and cluster structure identification. The study explores the cluster structure distribution as a function of experimental conditions and investigates their structural stability by electron beam irradiation. The Au clusters studied were produced by inert ga

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35

Cramp, Nicholas Charles. "Characterisation of interface spin clusters in polycrystalline exchange bias thin films." Thesis, University of York, 2013. http://etheses.whiterose.ac.uk/6578/.

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A study of exchange bias systems has been made focusing on the characteristics of the interfacial spin clusters found in-between the bilayers. The materials studied were primarily IrMn (10nm) / CoFe (2nm) thin films of varying grain sizes. They were selected as the bulk properties have already been well characterised and they exhibit the effects being looked for. A combination of vibrating sample magnetometry and electron microscopy has been used to investigate the nature of the interfacial spin clusters. Measurements were selected which specifically highlight the properties of the clusters. T

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36

Borowiak-Palen, Ewa. "Synthesis and characterisation of molecular nanostructures." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2004. http://nbn-resolving.de/urn:nbn:de:swb:14-1092389977453-71487.

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In this thesis, bulk and local scale spectroscopic and microscopic tools have been applied to investigate the purified raw material of SWCNT and synthesized MWBNNT, BN-nanocapsules, B-doped SWCNT and SiC nanostructures. Using bulk scale sensitive techniques, including optical absorption spectroscopy, Raman spectroscopy, high-resolution electron energy-loss spectroscopy, the average response of the whole sample is obtained. On the other hand, on a local scale transmission and scanning electron microscopy as well as TEM-electron energy-loss spectroscopy provide information on single tubes or oth

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37

MacKinnon, Craig David. "Synthesis and characterisation of molecular conductors." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ27459.pdf.

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38

Duerr, Heike Edith. "Molecular characterisation of neuropeptides in echinoderms." Thesis, Royal Holloway, University of London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314294.

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39

Tree, Timothy Ian Martin. "Molecular characterisation of Onchocerca volvulus antigens." Thesis, Imperial College London, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.321651.

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40

Lonie, Lorne James. "Molecular characterisation of hereditary multiple exostoses." Thesis, University of Oxford, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.421029.

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41

Leaves, Nicholas I. "The molecular characterisation of Haemophilus influenzae." Thesis, Oxford Brookes University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.283815.

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42

Powner, M. B. "Molecular characterisation of the human macula." Thesis, University College London (University of London), 2012. http://discovery.ucl.ac.uk/1348546/.

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The human macula is essential for high acuity vision but its biochemical and cellular properties are poorly understood. A disease that specifically affects the macula, Macular Telangiectasia (MacTel) type2 was investigated by studying postmortem tissue from a single donor. This revealed Müller cell loss specifically in the macula, which might be responsible for the vascular changes and photoreceptor degeneration typical of this disease. To establish whether the disease has subclinical vascular changes outside the macula, the peripheral retina was studied. This showed that contrary to previous

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43

Henderson, Gary William. "A molecular characterisation of Mapuera virus." Thesis, Queen's University Belfast, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241365.

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44

Gong, Luwen. "Molecular characterisation and modelling of hydroprocesses." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/molecular-characterisation-and-modelling-of-hydroprocesses(a2514b5b-93e0-41d2-abbb-6c515774e188).html.

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Petroleum is a valuable natural resource, and it is therefore of great significance to exploit the maximum economic potentials of the hydrocarbon molecules. Under current circumstances, marginal profit of the refining industry is highly affected by heavier and sourer crude oils, stricter environmental regulations, more stringent product specifications and higher market demands of lighter products, all of which emphasize the importance of secondary processes such as hydrotreating and hydrocracking. The lumping methods for process modelling are no longer applicable as they fail to predict proper

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45

Davies, Hazel M. "Synthesis and characterisation of molecular materials." Thesis, University of Bath, 2008. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.501495.

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Chapter 1 contains a brief background into subjects such as Robin-Day classes, binary code, logic gates and electrochemistry in order to aid understanding of the rest of the chapter. The unique paradigm of Molecular Quantum Cellular Automata (MQCA) is presented along with the advantages it offers to traditional silicon based electronics. A summary of the existing modelled and synthesised MQCA systems is included along with an explanation of the characteristics required for materials to be suitable for MQCA. The subject of chapter 2 is cyclopentadiene cobalt cyclobutadiene complexes for the app

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46

Techau, Michala Eichner. "Molecular characterisation of Slc11a1 transport function." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.614301.

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47

DuBern, Charlotte Louise. "Molecular characterisation of Saccharomyces cerevisiae Tra1p." Thesis, University of Cambridge, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.620916.

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48

Zheng, Xiaowei. "Molecular characterisation of O-GlcNAc transferase." Thesis, University of Dundee, 2013. https://discovery.dundee.ac.uk/en/studentTheses/16c0b22c-14cb-4410-9b41-c1762bba8c92.

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49

Choong, Siew Shean. "Comparative molecular characterisation of adipose tissue." Thesis, University of Nottingham, 2016. http://eprints.nottingham.ac.uk/31004/.

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Adiposity is linked to reproductive efficiency as adipose tissue (AT) is known to influence the hypothalamic-pituitary-gonadal axis, although the exact roles of AT remain poorly understood. Different cattle and pig breeds exhibit different adiposity and reproductive characteristics. The hypothesis is that differences in adiposity underpin the phenotypic differences in reproductive performance in these animals. To test this hypothesis, next generation RNA sequencing analysis was completed of AT from (i) cattle (Holstein, Hereford and Aberdeen Angus cross breeds enrolled in a dietary protein fee

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50

Slack, Gillian Sinclair. "Molecular and biological characterisation of orthobunyaviruses." Thesis, University of Glasgow, 2016. http://theses.gla.ac.uk/7303/.

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Orthobunyaviruses are the largest genus within the Bunyaviridae family, with over 170 named viruses classified into 18 serogroups (Elliott and Blakqori, 2001; Plyusnin et al., 2012). Orthobunyaviruses are transmitted by arthropods and have a tripartite negative sense RNA genome, which encodes 4 structural proteins and 2 non-structural proteins. The non-structural protein NSs is the primary virulence factor of orthobunyaviruses and potent antagonist of the type I interferon (IFN) response. However, sequencing studies have identified pathogenic viruses that lack the NSs protein (Mohamed et al.,

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