Dissertations / Theses on the topic 'Reaction centre'
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Watson, Ashley James. "Stability and interactions of the purple bacterial reaction centre." Thesis, University of Bristol, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.424644.
Full textAshby, M. K. "Reaction centre and light harvesting genes of Rhodobacter sphaeroides." Thesis, Imperial College London, 1988. http://hdl.handle.net/10044/1/46944.
Full textHe, Weizhong. "Spectroscopic properties of the isolated photosystem II reaction centre." Thesis, Imperial College London, 1991. http://hdl.handle.net/10044/1/46812.
Full textWakeham, Marion Charlotte. "Inactive branch electron transfer in the purple bacterial reaction centre." Thesis, University of Bristol, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.400271.
Full textRolfe, Stephen Alexander. "Electron transport in cyanobacterial photosystem II." Thesis, University of Cambridge, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.258430.
Full textAlizadeh, Sedigheh. "Characterisation of the photosystem two reaction centre complex from Chlamydomonas reinhardtii." Thesis, Imperial College London, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294966.
Full textBohles, Felix. "Protein-cofactor interactions in the photosynthetic reaction centre of Rhodobacter sphaeroides." Thesis, Queen Mary, University of London, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.509673.
Full textNewell, William Robert. "Organisation of the photosystem two reaction centre as revealed by spectroscopy." Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/47587.
Full textAshraf, Khuram Umar. "Studies of the green sulphur bacterial reaction centre from Chlorobaculum tepidum." Thesis, University of Glasgow, 2014. http://theses.gla.ac.uk/6379/.
Full textWallin, Elizabeth. "The germinal centre reaction and follicular T cells in alloantibody formation." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:e4ecdd13-7c1e-4d4e-8491-8a22857cdb86.
Full textHingorani, Kastoori. "Photo-oxidation of tyrosine in a bio-engineered bacterioferritin 'reaction centre'." Phd thesis, Canberra, ACT : The Australian National University, 2012. http://hdl.handle.net/1885/11774.
Full textJun, Daniel Young. "Recombinant expression and band-gap engineering of the bacterial photosynthetic reaction centre." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/61292.
Full textScience, Faculty of
Microbiology and Immunology, Department of
Graduate
Mecker, Christoph J. Chemistry Faculty of Science UNSW. "The synthesis of advanced " special pair " models for the photosynthetic reaction centre." Awarded by:University of New South Wales. School of Chemistry, 2000. http://handle.unsw.edu.au/1959.4/17835.
Full textRidge, Justin Paul. "The role of the protein during energy transduction in the bacterial reaction centre." Thesis, University of Sheffield, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301469.
Full textFenning, Trevor. "The expression in E. coli of a cyanobacterial gene encoding a photosystem II reaction centre protein." Thesis, University of Nottingham, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335196.
Full textGibbs, Sheila. "Ground reaction forces and control of centre of mass motion during gait : implications for intervention in cerebral palsy." Thesis, University of Dundee, 2014. https://discovery.dundee.ac.uk/en/studentTheses/f8110ed3-fa10-4580-959f-7ac0486e8d7a.
Full textZander, Linda. "The germinal centre reaction : genetic and proteomic analysis of factors important for survival and growth of B lymphocytes /." Göteborg : Dept. of Microbiology and Immunology, Sahlgrenska Academy, Göteborg University, 2008. http://hdl.handle.net/2077/9505.
Full textHawkes, C. M. "A study of the reaction esup(+)esup(-)-musup(+)musup(-)(gamma) at centre of mass energies up to 46.78GeV." Thesis, University of Oxford, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.355754.
Full textBunner-Pilotelle, Anne. "Lipid-protein and protein-protein interactions in the mechanisms of photosynthetic reaction centre and the Na+, K+-ATPase." Paris 11, 2008. http://www.theses.fr/2008PA112163.
Full textReported Iiterature values of the dissociation constant, Kd, of ATP with the E1 conformation of the Na+. K++ATPase based on equilibrium titrations and kinetic methods disagree. Using isothermal titration calorimetry ((TC) and simulations of the expected equilibrium behaviour for different binding models, this thesis presents an eX~lanation for this apparent discrepancy based on protein-protein interactions. Because of the importanCE of Mg + in ATP hydrolysis, kinetic studies of Mg2+ binding to the protein were also carried out. These studies showed that ATP alone is responsible for Mg2+ complexation, with no significant contribution from the enzyme environ ment
Bizabani, Christine. "The diversity of root fungi associated with Erica species occurring in the Albany Centre of Endemism." Thesis, Rhodes University, 2015. http://hdl.handle.net/10962/d1018575.
Full textJuodžbalienė, Vilma. "Paauglių pusiausvyros, paprastosios ir psichomotorinės reakcijos priklausomybė nuo regos lygio." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2006. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2005~D_20060118_182900-43929.
Full textFarrington, Benjamin Joseph. "A tale of two spins : electron spin centre assemblies with N@C60 for use in QIP." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:7f280123-41af-4d96-bf34-04094aaba1dd.
Full textDahlenborg, Katarina. "Celluar and molecular aspects of the germinal center reaction." Lund : Lund University, 1998. http://catalog.hathitrust.org/api/volumes/oclc/68945013.html.
Full textHUBERT, JEAN-GASPARD. "Rmn de proteines 4fe-4s : proprietes structurales et transfert electronique intramoleculaire." Université Joseph Fourier (Grenoble), 1996. http://www.theses.fr/1996GRE10175.
Full textMeziane, Driss. "Etude de la polymérisation des alcynes amorcée par un dérivé alkylidène du tungstène." Paris 13, 1986. http://www.theses.fr/1986PA132002.
Full textBartoli, Alexandra. "Approche unifiée aux squelettes polycycliques de molécules isolées du genre Schisandra via une nouvelle réaction domino." Thesis, Aix-Marseille 3, 2011. http://www.theses.fr/2011AIX30023.
Full textThe spiro [6.4] ring system is a recurring structural motif in numerous natural products such as Lancifodilactones, Micrandilactones and Rubriflordilactones. These polycyclic structures represent a synthetic challenge for organic chemists. Indeed, these molecules present at least nine stereogenic centers including several quaternary ones. The main goal of this work was to develop new metal-catalyzed reactions as key steps to obtain quickly and efficiently the polycyclic core of those natural products. The first part of these studies was dedicated to the development of a new palladium-catalyzed domino reaction leading to, depending on the conditions used, different polycyclic cores of nortriterpenoids coming from the same family, in a totally diastereoselective manner. This domino sequence of three reactions allowed the collective synthesis of various skeletons of natural products isolated from the Schisandra genus, in one pot. An approach to the tetracyclic core of Lancifodilactone F applying this methodology for the construction of the spirolactone moiety was then envisaged. A highly functionalized cycle D was synthetized in a diastereoselctive way via an Ireland-Claisen rearrangement and a ring closing metathesis reaction. Afterwards, an intramolecular cyclopropanation followed by the domino reaction should allow an access to the ABCD skeleton of Lancifodilactone F. In the last part, two approaches to the CDEF and ACDE cores of Rubriflordilactone A were developed around the same key reaction: a [2+2+2] cycloaddition of an acyclic triynic compound. The tricyclic skeleton CDE was reached at once in a single step. The ACDE tetracyclic moiety should be quickly accessible after few modifications of the initial strategy
Hasegawa, Jun-ya. "Theoretical Study on the Excited States and Electron Transfer Reactions in Photosynthetic Reaction Center." Kyoto University, 1998. http://hdl.handle.net/2433/77871.
Full textYaghoubi, Houman. "Bio-Photoelectrochemical Solar Cells Incorporating Reaction Center and Reaction Center Plus Light Harvesting Complexes." Scholar Commons, 2015. http://scholarcommons.usf.edu/etd/5803.
Full textChanna, Aravinda Wijesinghe W. M. "Photosynthetic antenna-reaction-center mimicry." Diss., Wichita State University, 2012. http://hdl.handle.net/10057/5369.
Full textThesis (Ph.D.)--Wichita State University, College of Liberal Arts and Sciences, Dept. of Chemistry
Gautrey, Charlotte. "The biomechanics of the dynamic defence mechanism." Thesis, University of Hertfordshire, 2013. http://hdl.handle.net/2299/13905.
Full textWilkinson, Jon N. "Regioselective reactions at a diruthenium centre." Thesis, University of Bristol, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266954.
Full textMoccellin, Ana Silvia. "Adaptações no controle postural estático e dinâmico durante a gestação." Universidade Federal de São Carlos, 2011. https://repositorio.ufscar.br/handle/ufscar/5279.
Full textUniversidade Federal de Minas Gerais
Pregnancy causes considerable physiologic, hormonal and anatomic changes in women that may affect the lower limbs and trunk movements, lead to instability of postural control and increased risk of falls, causing a direct impact on mother´s health and quality of life. We conducted three studies to examine the changes in static postural control (STUDY I), in dynamic postural control (STUDY II) and the relationship of these changes with quality of life (STUDY III) of 13 pregnant women during the gestational period (G1, G2 and G3), and a control group of 29 non-pregnant women. For static postural control assessment, a force plate (Bertec®) was used and to assess the quality of life was used the WHOQOL-Bref. In STUDY I posturographic tests were applied in four still standing positions, for three trials, with a combination of different visual conditions (eyes open - EO/eyes closed - EC) and support base configurations. The variables analyzed, derived from the center of pressure (COP), were statokinesigram, displacement amplitude, displacement velocity and sway frequency. In STUDY II were analyzed variables of ground reaction force during the stance phase of gait: time and value of the first peak (P1), second peak (P2) and the valley of the vertical component; time and maximum and minimum value found in the anteroposterior horizontal component (max Fy / min Fy) and the difference between the maximum and minimum values in the mediolateral horizontal component ( max min Fx). And in the STUDY III we used data from the first two studies, plus the assessment of quality of life of pregnant women. The results demonstrate that, early in pregnancy, the woman's body seems to be already adapted for postural control, probably due to hormonal factors, and during the trimesters there was a decrease in postural stability. Compared to the control group, pregnant women had larger areas, an increase in the amplitudes and velocities of COP displacement, more time in the first phase of weight acceptance, lower values of peak 1 and 2 of the vertical component and lower maximum and minimum values of anteroposterior horizontal component of ground reaction force, possibly indicating a reduction in speed and thrust of the gait. With respect to quality of life, the physical domain was the most affected in the first trimester, with lower values mainly during late gestation.
A gestação ocasiona consideráveis alterações fisiológicas, hormonais e anatômicas na mulher que podem afetar os membros inferiores e os movimentos do tronco, levar a uma instabilidade do controle postural e aumentar o risco de quedas, podendo gerar um impacto direto na saúde e qualidade de vida da gestante. Foram realizados três estudos com o objetivo de analisar as adaptações no controle postural estático (ESTUDO I), no controle postural dinâmico (ESTUDO II) e a relação dessas adaptações com a qualidade de vida (ESTUDO III) de 13 gestantes, ao longo dos trimestres gestacionais (G1, G2 e G3), além de um grupo controle formado por 29 mulheres não-gestantes. Para avaliação do controle postural utilizou-se uma Plataforma de Força (Bertec®), e para a avaliação da qualidade de vida utilizou-se o instrumento WHOQOL-bref. No ESTUDO I foram aplicados testes posturográficos em quatro posições eretas estáticas, por três tentativas, combinando diferentes condições visuais (olhos abertos OA/ olhos fechados OF) e diferentes configurações da base de suporte. As variáveis analisadas, relacionadas com o centro de pressão, foram a área elíptica do estatocinesigrama, a amplitude de deslocamento, a velocidade de deslocamento e a freqüência de oscilação. No ESTUDO II foram analisadas as variáveis da força de reação do solo na fase de apoio da marcha: tempo e valor do primeiro pico (P1), segundo pico (P2) e vale da componente vertical; tempo e valor máximo e mínimo encontrado na direção ântero-posterior da componente horizontal (max Fy/min Fy) e a diferença entre os valores máximo e mínimo na direção médiolateral do componente horizontal (max-min Fx). E no ESTUDO III foram utilizados dados dos dois primeiros estudos, acrescidos da avaliação da qualidade de vida das gestantes. Os resultados mostraram que, logo no início da gestação, o organismo feminino pareceu já sofrer adaptações no controle postural, provavelmente por fatores hormonais e, no decorrer dos trimestres, ocorreu uma tendência à redução da estabilidade postural. Comparadas ao grupo controle, as gestantes apresentaram maiores áreas, amplitudes e velocidades de deslocamento do centro de pressão, maior período de tempo na primeira fase de aceitação do peso, menores valores dos picos 1 e 2 da componente vertical e menores valores máximo e mínimo da componente horizontal ântero-posterior da força de reação do solo, possivelmente indicando uma redução na velocidade e na força de propulsão da marcha. Com relação à qualidade de vida, o domínio físico foi o mais afetado logo no primeiro trimestre, apresentando menores valores principalmente ao final da gestação.
Rodier, Fabien. "Nouvel accès chimio-, régio- et stéréosélectif aux motifs spirolactones polycycliques via une réaction de cycloaddition [3+2]." Thesis, Aix-Marseille, 2012. http://www.theses.fr/2012AIXM4324.
Full textThe spiro (7, 5) ring system is a recurring structural moiety in numerous natural products such as Micrandilactones and Rubriflordilactones. In term of complexity, these polycyclic structures represent a synthetic challenge for organic chemist. Indeed, these molecules present at least nine stereogenic centres including several quaternary ones. The main goal of this work was to use unprecedented partners in the [3+2] cycloaddition reaction to obtain quickly and efficiently the polycyclic core of those natural products. The first part of these studies was dedicated to the development of an intra- and intermolecular [3+2] cycloaddition using for the first time a γ-alkylidene-butenolide dipolarophile. This approach provides rapid and facile access to highly functionalised polycyclic molecules along with excellent regio-, chemo- and stereoselectivities. In addition, thanks to computational studies an overall picture of the mechanism of the intermolecular rhodium catalysed [3+2] cycloaddition between 2-diazo-1,3-ketoester and protoanemonin was apprehended, and experimental results have been rationalised.Finally, two approaches to the ABC and CD cores of Micrandilactone C were developed using respectively a formal intermolecular [3+2] cycloaddition reaction in presence of a silicon acetal linker followed by a Diels Alder reaction. The ACDE tetracyclic moiety should be quickly accessible after few modifications of the initial strategy
Wigginton, James Richard. "The reactions of diynols at a diruthenium centre." Thesis, University of Bristol, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274641.
Full textSoltau, Carl Peter. "Nitroxide trapping of radical species formed from the reaction of sulfoxides with reactive oxygen species." Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/210339/1/Carl_Soltau_Thesis.pdf.
Full textRobert, Bruno. "Etude de la structure et des interactions au sein des complexes proteine pigments impliques dans la photosynthese bacterienne : contribution de la spectrometrie raman de resonance." Paris 6, 1987. http://www.theses.fr/1987PA066603.
Full textFigueredo, Michael. "Reactive architecture : Urban Recreational center." FIU Digital Commons, 2005. https://digitalcommons.fiu.edu/etd/3595.
Full textSmyth, R. M. "Studies of nuceophilic reactions at unsaturated centres." Thesis, University of Kent, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233495.
Full textFyfe, Paul Kelman. "Biophysical investigations of photosynthetic reaction centres from Rhodobacter sphaeroides." Thesis, University of Glasgow, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263434.
Full textCrystall, Ben. "Time resolved fluorescence studies of photosystem 2 reaction centres." Thesis, Imperial College London, 1990. http://hdl.handle.net/10044/1/47831.
Full textBooth, Paula Jane. "Thermodynamics of electron transfer in photosystem 2 reaction centres." Thesis, Imperial College London, 1990. http://hdl.handle.net/10044/1/47779.
Full textRastelli, Julia. "Latent Epstein-Barr virus infection and the germinal center reaction." Diss., lmu, 2007. http://nbn-resolving.de/urn:nbn:de:bvb:19-105021.
Full textBalelli, Irène. "Fondements mathématiques de la maturation d’affinité des anticorps." Thesis, Sorbonne Paris Cité, 2016. http://www.theses.fr/2016USPCD091/document.
Full textThe adaptive immune system is able to produce a specific response against almost any pathogen that could penetrate our organism and inflict diseases. This task is assured by the production of antigen-specific antibodies secreted by B-cells. The agents which causes this reaction are called antigens: during an immune response B-cells are submitted to a learning process in order to improve their ability to recognize the immunizing antigen. This process is called antibody affinity maturation. We set a highly flexible mathematical environment in which we define and study simplified mathematical evolutionary models inspired by antibody affinity maturation. We identify the fundamental building blocks of this extremely efficient and rapid evolutionary mechanism: mutation, division and selection. Starting by a rigorous analysis of the mutational mechanism in Chapter 2, we proceed by successively enriching the model by adding and analyzing the division process in Chapter 3 and affinity-dependent selection pressures in Chapter 4. Our aim is not to build a very detailed and comprehensive mathematical model of antibody affinity maturation, but rather to investigate interactions between mutation, division and selection in a simplified theoretical context. We want to understand how the different biological parameters affect the system’s functionality, as well as estimate the typical time-scales of the exploration of the state-space of B-cell traits. Beyond the biological motivations of antibody affinity maturation modeling, the analysis of this learning process leads us to build a mathematical model which could be relevant to model other evolutionary systems, but also gossip or virus propagation. Our method is based on the complementarity between probabilistic tools and numerical simulations
Grimshaw, M. D. "Reactions of propargyl alcohols and propargyl amines at a diruthenium centre." Thesis, University of Bristol, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274617.
Full textRaave, DA. "The control and auxiliary equipment of the national accelerator centre precision = 1,5m scattering chamber." Thesis, Cape Technikon, 1987. http://hdl.handle.net/20.500.11838/1111.
Full textA variable-energy separated sector cyclotron with a K value of 200 MeV as well as an 8 MeV solid pole injector cyclotron has been completed at the national Accelerator Centre complex at Faure. These accelerators will produce bith light-ion and heavy-ion beams for Nuclear Physics, Radiotherapy and Isotope production.
Tetreault, Michelle Lynn. "Investigation of the docking and electron transfer reactions between cytochrome c₂ and the reaction center from the photosynthetic bacteria Rhodobacter sphaeroides using site-directed mutants /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC IP addresses, 1999. http://wwwlib.umi.com/cr/ucsd/fullcit?p9945781.
Full textWynne, Graham M. "Oxygen centred radical fragmentations in polycycle constructions." Thesis, University of Nottingham, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294257.
Full textMauthe, Silvia [Verfasser]. "Mimicking the reactive center of photosystem II : analysis of the reaction behavior of free tetrameric and pentameric (Calcium-)manganese-oxide cluster ions / Silvia Mauthe." Ulm : Universität Ulm, 2021. http://d-nb.info/1228439087/34.
Full textChuang, Jessica I.-Jane. "Understanding unidirectional electron transfer in the photosynthetic reaction center using protein engineering /." May be available electronically:, 2007. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.
Full textBecton, J. Bret Feild Hubert S. "Candidate reactions to three assessment center exercises a field study /." Auburn, Ala., 2005. http://repo.lib.auburn.edu/2005%20Summer/doctoral/BECTON_J._14.pdf.
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