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Dissertations / Theses on the topic 'Thermochemical and kinetic studies'

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1

Khan, Mohammad A. "Thermochemical kinetic studies of organic peroxides relevant to the combustion of hydrocarbons." Thesis, University of Aberdeen, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.290241.

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In the combustion of fuels and related organic compounds the initial step consists of a free radical forming process occurring either homogeneously or heterogeneously, such as RH + O<sub>2 → R + HO</sub>_2 (1) The radical R, reacts with oxygen to produce an alkyl or other peroxy radical: R + O_2 ↔ RO<sub>2</sub> (2) One of the controversies involved in the mechanism for the oxidation of hydrocarbons is the route for the unimolecular decomposition of the hydroperoxy alkyl radical (R<sub>-H</sub>OOH). This would be produced as a result of the isomerisation of the alkyl peroxy radical (RO<sub>2</
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2

Davies, Joanne Wendy. "Studies of gas-phase radical reactions." Thesis, University of Oxford, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329952.

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3

Stewart, Paul Hendry. "Theoretical and experimental studies of unimolecular reactions relevant to combustion and the atmosphere." Thesis, University of Aberdeen, 1986. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU366734.

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The pyrolysis of methyl nitrite (1 torr) in the presence of nitrogen dioxide (1 torr) was studied at 458K over the pressure range 0-760 torr of carbon tetrafluoride. The only detectable products were methyl nitrate and formaldehyde. The decomposition can be described by the following simple mechanism: CH₃ONO + M → CH₃O + NO + M (1); CH₃O + NO₂ → CH₃ONO₂ (2); CH₃O + NO₂ → HCHO + HONO (3). Step (1) was found to be stongly pressure dependent with a P½ value of 760 torr. The rate constant for decomposition k₁ was found from RRKM modelling to be given by the following expression: log (k₁/s⁻¹) = 15.
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4

Fiagome, Elizabeth Delanyo. "Thermochemical studies of some iodates." Thesis, Teesside University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387140.

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5

Chatre, Lucas. "Étude et modélisation des phénomènes de transport et réactionnels dans un four à vis." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASB034.

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Les convoyeurs à vis sont très largement utilisés dans l'industrie chimique. Du fait de leur capacité de mélange et de transport, ils sont mis en œuvre pour différentes applications (convoyage, séchage, pyrolyse, etc.). Cette technologie se voit ainsi utilisée dans le retraitement de matière nucléaire, notamment pour stabiliser des oxalates de plutonium en oxyde. De nombreuses études ont été menées à l'échelle du laboratoire afin d'établir précisément les mécanismes réactionnels par analyse thermogravimétrique (ATG) et les propriétés physico-chimiques des espèces mises en jeu. Il s'agit de réa
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6

Aubry, Christiane. "Thermochemical and mass spectrometric studies of gas phase ions." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq26103.pdf.

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7

Huynh, Kathy Tang. "Gas-Phase Thermochemical Properties of Proline-Containing Dipeptides and Fluorinated Alcohols using the Extended Kinetic Method." W&M ScholarWorks, 2016. https://scholarworks.wm.edu/etd/1539626981.

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8

Dasopoulos, P. "Thermochemical studies of siliceous zeolites for vapour phase adsorption processes." Thesis, University of Surrey, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.374206.

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9

Hall, I. W. "Kinetic studies of atmospheric reactions." Thesis, University of Oxford, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.236263.

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10

Hindmarsh, Kathryn. "Kinetic studies of platinum complexes." Thesis, University of Canterbury. Chemistry, 1998. http://hdl.handle.net/10092/8647.

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Since the chance discovery, in 1967, of the anti-tumour activity of cisplatin, cis-dichlorodiammineplatinum(II), research has focussed on studying the reactions of this and other related complexes in an effort to elucidate the nature of the biological activity. This thesis presents a study of the aqueous solution chemistry of some platinum(II) and platinum(IV) complexes in order to extend what is known about the simple chemistry of this biologically important class of compounds. The chloride ion anation of diaqua (cis-[Pt(OH₂)₂(N)₂]²⁺) complexes is investigated as is the bromide ion anation o
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11

Jones, J. "Kinetic studies on NADsup(+):ADPribosyltransferase." Thesis, University of Reading, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372662.

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12

Wong-Pascua, David Han Yen. "Kinetic studies of carotenoid degradation." Thesis, Durham University, 2017. http://etheses.dur.ac.uk/12389/.

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Carotenoids are a diverse family of naturally occurring pigments that are produced by plants, photosynthetic bacteria and certain fungi. Their biological roles within these organisms include the quenching of reactive oxygen species, acting as accessory pigments in photosystems and the colouration of flowers and fruits. Although mammals do not produce carotenoids, they may be obtained through the diet. Numerous health benefits in humans have been found to be associated with carotenoid containing diets, such as the maintenance of cardiovascular health and protection against degenerative eye dise
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13

Jouvelet, Benjamin. "Kinetic studies of supramolecular polymer." Paris 6, 2013. http://www.theses.fr/2013PA066102.

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Appropriately designed bis-urea monomers dissolved in apolar solvent self-assembled through intermolecular hydrogen bonds into two distinct aggregates. Simple filaments with one monomer in the cross-section are formed at high temperature, although tubes with three bis-ureas in the cross section are formed at low temperature. These two aggregates self-assembled in a highly cooperative fashion and are in dynamic equilibrium with free monomers in solution. Kinetic studies were conducted on this system to determine different mechanistic purposes. By using chiral bis-urea monomers, supramolecular c
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14

Ruzicka, Alexander Marion. "Petrologic-kinetic studies of meteorites." Diss., The University of Arizona, 1996. http://hdl.handle.net/10150/187466.

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This dissertation presents the results of six published and submitted papers covering various petrologic and kinetic studies of meteorites. The principal topic was the formation of mineralogically layered structures by diffusion-controlled reactions during metamorphism or metasomatism. Previous steady-state models for forming mineral layers by metasomatism were modified to make such models more versatile. These models were used in conjunction with chemical and petrographic data obtained with microprobe, scanning-electron-microscopy (SEM), and optical microscopy techniques to study (1) olivine
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15

Hischier, Illias. "CO₂ splitting via a solar thermochemical cycle based on Zn/ZnO redox reactions: thermodynamic and kinetic analysis." Zürich : ETH, Swiss Federal Institute of Technology Zurich, Institute of Energy Technology, 2008. http://e-collection.ethbib.ethz.ch/show?type=dipl&nr=360.

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16

Villano, Stephanie M. "Gas-phase negative ion chemistry: Photoelectron spectroscopy, reactivity, and thermochemical studies." Connect to online resource, 2008. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3337158.

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17

Schmidt, Mark. "Thermochemical Treatment of TiO2 Nanoparticles for Photocatalytic Applications." Scholar Commons, 2007. http://scholarcommons.usf.edu/etd/3428.

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Titanium Dioxide (TiO 2) has been considered an ideal photocatalyst due to factors such as its photocatalytic properties, chemical stability, impact on the environment and cost. However, its application has been primarily limited to ultraviolet (UV) environments due to its high band gap (3.2 eV). This high band gap limits the harvesting of photons to approximately 4% of sunlight radiation. Research today is focused on lowering this gap by doping or coupling TiO 2 with other semiconductors, transition metals and non-metal anions, thereby expanding its effectiveness well into the visible range
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18

Hughes, Morris. "Kinetic studies of electrical storage cells." Thesis, Loughborough University, 1985. https://dspace.lboro.ac.uk/2134/27952.

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The thesis describes an investigation of the kinetics of certain electrochemical energy storage systems. The work mainly involves A.C. impedance measurements made over a wide frequency range on some primary and secondary cells. In a number of cases this was sufficient to establish the electrochemistry and evaluate the magnitudes of the circuit elements of the analogue for the cell. In some other cases (secondary cells) the electrode behaviours of anode and cathode had to be established in order to produce the composite cell behaviours.
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19

Alkherraz, Abdulfattah M. "Kinetic studies of phosphoryl transfer reactions." Thesis, University of Sheffield, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.531190.

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20

Morris, Philippa Ann. "Kinetic and product studies involving thionitrites." Thesis, Durham University, 1987. http://etheses.dur.ac.uk/6675/.

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The kinetics of nitrosation of cysteine, cysteine methyl ester, N-acetylcysteine, penicillamine, N-acetylpenicillamine, glutathione and thioglycolic acid was undertaken. These thiols exhibited identical rate laws which are interpreted as nitrosation at sulphur by H(_2)NO(_2)(^+)/NO(^+). The rate constants determined show the high reactivity of thiols towards the nitrosating agent. The nucleophile catalyzed reactions were also investigated and the order of reactivity NOCl > NOBr > NOSCN was observed. Normally in these nucleophile catalyzed reactions there is a first order dependence on [thiol].
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21

Colthurst, Matthew John. "Kinetic studies of carbonyl group transfer." Thesis, University of Kent, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240168.

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22

Martin, Paul Anthony. "Transient kinetic studies of propane hydrogenolysis." Thesis, University of Cambridge, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239493.

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23

Kwak, Yungwan. "Kinetic studies on living radical polymerizations." 京都大学 (Kyoto University), 2006. http://hdl.handle.net/2433/144032.

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24

Pisano, Mary Grace. "Determining the Efficacy of the Extended Kinetic Method for Determination of Thermochemical Properties of Small, High-Entropy, Organic Molecules." W&M ScholarWorks, 2015. https://scholarworks.wm.edu/etd/1539626795.

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25

Steiner, Petr. "Kinetic and Deactivation Studies of Hydrodesulfurization Catalysts." Doctoral thesis, Norwegian University of Science and Technology, Department of Chemical Engineering, 2002. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-94.

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<p>Hydrodesulfurization is an important part of the hydrotreating process. More stringent regulations on the quality of fuels bring new requirements to the catalytic processes. The removal of sulfur has become a key issue in the oil refining and this work aims to address several aspects of the process.</p><p>Kinetic studies of the hydrodesulfurization reaction over conventional (molybdenum-based) and new (Pt/Y-zeolite) catalysts are reported. The hydrodesulfurization of both the real oil (light gas oil from Statoil Mongstad refinery) and model compounds (thiophene and dibenzothiophene) over a
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26

Cornell, Stephen John. "Studies of freezing in kinetic Ising models." Thesis, University of Oxford, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.257825.

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27

Moroney, S. E. "Kinetic studies on the biosynthesis of penicillin." Thesis, University of Oxford, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.354849.

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28

Beltran-Alvarez, Pedro. "Kinetic studies on the actinorhodin polyketide synthase." Thesis, University of Bristol, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.492551.

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The actinorhodin (act) minimal polyketide synthase (PKS) from Streptomyces coelicolor consists of three proteins: an acyl carrier protein (ACP), and two P-ketoacyl ACP synthase components known as KSa and KSp. The act minimal PKS catalyzes at least 18 separate reactions, which can be divided into loading, initiation, extension, and cyclization and release phases.
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29

Crookes, Michael Jonathan. "Kinetic studies of nitrosations by alkyl nitrites." Thesis, Durham University, 1988. http://etheses.dur.ac.uk/6586/.

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The reactions of tertiary butyl nitrite and isopropyl nitrite in aqueous acid solution have been studied. In the case of Isopropyl nitrite the rates of reaction with hydrazoic acid, sulphamic acid, thioglycolic acid and N-methylaniline are markedly reduced by the addition of propan-2-ol. This has been explained in terms of a rapid hydrolysis of the alkyl nitrite to yield an equilibrium concentration of nitrous acid which then effects nitrosation. Analysis of the results gives values for the equilibrium constant for isopropyl nitrite hydrolysis and for the rate constants for nitrous acid nitros
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30

Moore, Dominic Thomas. "Kinetic studies of catalysed oxidations by H2O2." Thesis, University of East Anglia, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300393.

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31

Borman, Christopher David. "Kinetic studies on galactose oxidase and laccase." Thesis, University of Newcastle Upon Tyne, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.391288.

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32

Gharibi, Hussein. "Electrochemical and kinetic studies in surfactant solutions." Thesis, University of Salford, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.258365.

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33

Mandani, Faisal Mohammad. "Kinetic and deactivation studies during catalytic dehydrogenation." Thesis, University of Salford, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305913.

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34

Nashat, Khalid Hashim. "Kinetic studies of the hepatic reticuloendothelial system." Thesis, University of Sheffield, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.280637.

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35

Knowles, Terence Spencer. "Crystallographic and kinetic studies on ruthenium catalysts." Thesis, University of Surrey, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.388993.

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36

Miles, Caroline S. "Kinetic and spectroscopic studies of flavocytochrome b2." Thesis, University of Edinburgh, 1992. http://hdl.handle.net/1842/12657.

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Flavocytochrome <i>b</i><SUB>2</SUB> (<i>b</i><SUB>2</SUB>) from baker's yeast catalyses the two electron oxidation of L(&43 )lactate to pyruvate and subsequent reduction of cytochrome c. The enzyme is a tetramer of identical subunits, each of which consists of two functionally distinct domains; a flavodehydrogenase domain containing flavin mononucleotide (FMN) and a cytochrome domain containing protoheme IX. The work in this thesis describes the investigation of the roles of specific amino acid residues, carried out through the kinetic and spectroscopic characterisation of site-directed mutan
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37

Williamson, Mark Allen. "Thermodynamic and kinetic studies of sulfur geochemistry." Diss., Virginia Tech, 1992. http://hdl.handle.net/10919/38485.

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38

Jang, Mei-Huei. "Mechanistic and kinetic studies of Trimethylamine Dehydrogenase /." The Ohio State University, 2000. http://rave.ohiolink.edu/etdc/view?acc_num=osu1488191124572066.

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39

Abdel, Aziz May. "Kinetic and Thermodynamic Studies of Thrombin Inhibitors." VCU Scholars Compass, 2013. http://scholarscompass.vcu.edu/etd/2956.

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Sulfated low molecular weight lignins (LMWLs), CDSO3 and FDSO3, designed recently as macromolecular mimetics of heparin, were found to exhibit potent anticoagulant activity. Small molecules based on the same scaffold, SBD and SBT, showed promising thrombin inhibition. We were able to address the mechanism of the inhibition using Michaelis-Menten kinetics. All the molecules were found to be allosterically impairing thrombin activity using either noncompetitive or uncompetitive mechanism. Absence of competition with hirugen, an exosite 1 ligand, and competition with polymeric heparin points to e
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40

López, Olvera Enrique Argenis. "Kinetic studies of carrier conjugated protease inhibitors." Thesis, Uppsala universitet, Institutionen för biologisk grundutbildning, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-397114.

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Conjugates of soybean trypsin inhibitor (SBTI) and potato serine protease inhibitor (PSPI) immobilized on metal oxide particles of ~100nm diameter were prepared. Inhibition of trypsin hydrolysis of BAPA by these conjugates was measured and enzyme kinetics constants kcat, KM, kcat/KM and ki were determined. Metal oxide particles presented an inhibitory effect similar to that of a competitive inhibitor, noticed through the increase value of the K M constant. Furthermore, PSPI conjugates had the highest inhibition of trypsin, illustrated by the significantly higher value of KM relative to the val
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41

Wang, Lijun. "Experimental and modelling studies of the thermophysical and thermochemical properties of some slag systems." Doctoral thesis, Stockholm : Skolan för teknikvetenskap, Kungliga Tekniska högskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11232.

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42

Woltz, Christian. "Kinetic studies on alkane hydroisomerization over bifunctional catalysts." [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=978158458.

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43

Gilvey, Lauren Brenna Galvagni. "Kinetic Studies of Dehaloperoxidase-Hemoglobin From Amphitrite Ornata." NCSU, 2006. http://www.lib.ncsu.edu/theses/available/etd-08302006-104458/.

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The focus of this research was to determine how three different factors affect the kinetics of the reaction between Dehaloperoxidase ? Hemoglobin (DHP-Hb), a halogenated phenol substrate, and a peroxide co-substrate. The factors examined were the order of addition of the substrate and co-substrate, the pH of the solutions, and the difference between using hydrogen peroxide (H2O2) and m-Chloroperbenzoic acid (MCPBA) as the co-substrates. The order of addition studies were carried out on a stop-flow apparatus. The results presented here demonstrate that the substrate must bind to DHP-Hb prior to
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44

Shang, Shubo. "Kinetic studies of hydrocarbon reactions over ruthenium catalysis." Thesis, University of Cambridge, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315931.

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45

Buxton, J. P. "Kinetic and dynamical studies of thermal decomposition reactions." Thesis, University of Oxford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.371510.

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46

Fogg, Andrew Michael. "Structural, kinetic and synthetic studies of intercalation compounds." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297906.

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47

Jiang, W. "TPD and steady-state kinetic studies of catalysts." Thesis, University of Cambridge, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.605605.

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The first part is the use of a variety of temperature programmed desorption techniques, analytical studies and numerical simulation to see whether it is possible to identify differences in the nature and number of hydroxyl groups associated with Cabosil and sol-gel silicas. The motivations of this work are to examine the strength of this technique to provide quantitative information about the heterogeneous surface and to explore the effects of different kinetic parameters on TPD spectra through both analytical and Monte Carlo methods. The second part of this thesis focuses on using a Monte Car
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48

Guo, Xingwei. "Kinetic and mechanistic studies on reactions of quinones." Diss., Ludwig-Maximilians-Universität München, 2014. http://nbn-resolving.de/urn:nbn:de:bvb:19-177113.

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49

Whitmore, James Michael John. "Kinetic studies of nucleophilic displacement at heteroaromatic centres." Thesis, University of Kent, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386135.

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50

Routledge, Carol A. "Kinetic studies on molybdenum and tungsten chalcogenide clusters." Thesis, University of Newcastle Upon Tyne, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308347.

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