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Dissertations / Theses on the topic 'Mediated oxidation'

Author: Grafiati

Published: 8 June 2024

Last updated: 31 July 2025

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1

Škrabalová, Lada. "Hemoglobin-mediated oxidation of marine liposomes." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2012. http://www.nusl.cz/ntk/nusl-216833.

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Cílem této práce bylo studium mechanismu oxidace lipidů katalyzované hovězím methemoglobinem a zhodnocení účinků různých experimentálních podmínek a antioxidantů (EDTA, askorbová kyselina, kávová kyselina, a-tokoferol, d-tokoferol, astaxanthin a L-askorbyl-6-palmitát) na methemoglobinem zprostředkovanou oxidaci lipidů v modelovém systému liposomů připravených z fosfolipidů. K monitorování oxidace lipidů při pH 5,5 a teplotě 30 °C bylo použito spotřeby kyslíku. Pro zhodnocení antioxidační aktivity v modelovém systému liposomů se ukázaly být důležitými faktory typ prooxidantu a koncentrace proox

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2

Wood, Geoffrey Paul Farra. "Theoretical Investigations of Radical-Mediated Protein Oxidation." Thesis, The University of Sydney, 2006. http://hdl.handle.net/2123/1413.

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This thesis primarily details the application of high-level ab initio quantum chemistry techniques in order to understand aspects of free-radical mediated protein oxidation. Traditionally, product analysis and electron paramagnetic resonance (EPR) spectroscopy are the primary means for elucidating the chemistry of protein oxidation. However, in experiments involving relatively small proteins reacting with a controlled radical-flux, a vast array of compounds can be produced, which are often difficult to analyse. Quantum chemical techniques on the other hand, can calculate the properties of any

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3

Wood, Geoffrey Paul Farra. "Theoretical Investigations of Radical-Mediated Protein Oxidation." University of Sydney, 2006. http://hdl.handle.net/2123/1413.

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Doctor of Philosophy (PhD)<br>This thesis primarily details the application of high-level ab initio quantum chemistry techniques in order to understand aspects of free-radical mediated protein oxidation. Traditionally, product analysis and electron paramagnetic resonance (EPR) spectroscopy are the primary means for elucidating the chemistry of protein oxidation. However, in experiments involving relatively small proteins reacting with a controlled radical-flux, a vast array of compounds can be produced, which are often difficult to analyse. Quantum chemical techniques on the other hand, can ca

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4

Hersey, Michelle. "Oxidation of Arsenite Via Chelator-mediated Fenton Systems." Fogler Library, University of Maine, 2006. http://www.library.umaine.edu/theses/pdf/HerseyMX2006.pdf.

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5

Probert, Gareth David. "The zirconocene-mediated synthesis of amines." Thesis, University of Southampton, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242623.

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6

Henderson, William Howell. "Palladium-Mediated C-H Activations." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1318003095.

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7

Wright, Adam. "Investigations of singlet oxygen-mediated amino acid, peptide and protein oxidation." Thesis, The University of Sydney, 2002. https://hdl.handle.net/2123/27830.

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8

Crosby, Natasha M. "The role of oxidation in hyperglycemia-mediated erythrocyte phospholipid asymmetry." [Bloomington, Ind.] : Indiana University, 2009. 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:3344761.

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Thesis (Ph. D.)--Indiana University, Dept. of Biology, 2009.<br>Title from PDF t.p. (viewed Oct. 8, 2009). Source: Dissertation Abstracts International, Volume: 70-02, Section: B, page: 0830. Adviser: David L. Daleke.

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9

Kapinga, Sarah Kasangana. "Organic binder mediated Co3O4/TiO2 heterojunction formation for heterogeneous activation of Peroxymonosulfate." Thesis, Cape Peninsula University of Technology, 2019. http://hdl.handle.net/20.500.11838/2811.

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Thesis (Master of Engineering in Chemical Engineering)--Cape Peninsula University of Technology, 2019.<br>A shortage of water has resulted in the need to enhance the quality of wastewater that is released into the environment. The advanced oxidation process (AOP) using heterogeneous catalysis is a promising treatment process for the management of wastewater containing recalcitrant pollutants as compared to conventional processes. As AOP is a reliable wastewater treatment process, it is expected to be a sustainable answer to the shortage of clean water. AOP using heterogeneous catalysis based o

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10

Han, Hyungjin Civil &amp Environmental Engineering Faculty of Engineering UNSW. "Mechanisms and modelling of sonochemically-mediated free radical degradation of contaminants." Awarded by:University of New South Wales. Civil & Environmental Engineering, 2009. http://handle.unsw.edu.au/1959.4/43485.

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Hazardous and recalcitrant pollutants in the environments have led to a great many environmental issues these days. Many researchers have focused on the approaches to treatment of these pollutants which contaminate environments such as soil, surface and groundwater. As an advanced oxidation processes (AOPs), sonolysis which is the oxidation technology involving the use of ultrasonic irradiation, has proven to be successful for the treatment and remediation of contaminated environments. In this thesis, hydrogen peroxide formation and formic acid degradation by ultrasonic irradiation of well-c

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11

Kristinova, Vera. "Oxidation of marine lipids in liposomes and emulsions mediated by iron and methemoglobin." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for bioteknologi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-25022.

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Long chain omega-3 polyunsaturated fatty acids (LC omega-3 PUFA) are vital for physiological functions and have therapeutic and health benefits. The consumption of LC PUFA in the Western world has been below recommended intake levels the past decades, despite promotion of seafood and omega-3 supplements. Incorporation of the LC PUFA into processed food consumed on a daily basis might therefore bridge the gap between the recommended and actual consumption of LC omega-3 PUFA. Unfortunately, the development of omega-3 enriched food is hampered by a very high susceptibility of LC PUFA to oxidative

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12

Mulder, Ashley Jade. "The Surface Oxidation States of Copper Nanoparticles Generated by Ligand-Mediated Laser Ablation." Thesis, Curtin University, 2017. http://hdl.handle.net/20.500.11937/59636.

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Copper nanoparticles (CuNPs) generated by Laser Ablation Synthesis in Solution (LASiS) were encapsulated and stabilised by a variety of ligands in solution. The encapsulation ligands where chosen to utilise the N-donor binding ability to the CuNPs. This facilitated the oxidative control of the CuNPs, controlling the surface plasmon resonance of the CuNPs. Exploitation of this oxidative control has implications for various nanotechnological applications.

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13

MARTINOVITY, FERENC. "Coupling of soot oxidation and ammonia-mediated selective catalytic reduction of nitrogen oxides." Doctoral thesis, Politecnico di Torino, 2021. http://hdl.handle.net/11583/2907024.

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14

Botfield, Andrew Civil &amp Environmental Engineering Faculty of Engineering UNSW. "Kinetic modelling studies of As(III) oxidation in dark pH 3 and 8 Fenton - mediated and pH 8 Cu(II) - H2O2 systems." Awarded by:University of New South Wales. School of Civil and Environmental Engineering, 2006. http://handle.unsw.edu.au/1959.4/31969.

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In this thesis, a combination of laboratory experimentation under well defined conditions coupled with a kinetic modelling approach is used to verify the existence and respective kinetic rates of previously unconfirmed or postulated mechanisms that drive and limit dark Fenton (Fe(II)/H2O2) - mediated As(III) oxidation at pH 3 and 8 and dark Cu(II) - H2O2 - mediated As(III) oxidation at pH 8. Dark Fenton - mediated oxidation of As(III) at pH 3 is first examined and the effects of the variation in the concentration of reactants (As(III), Fe(II) and H2O2), oxygen, phosphate and organics (2 - prop

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15

Lycksam, Jonas. "Metal Mobilization in Mine Waste as a Result of Oxidation and Bacterial Mediated Activity." Thesis, Umeå universitet, Kemiska institutionen, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-95210.

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16

Tobler, Nicole Béatrice. "Iron-mediated coupling of microbial oxidation and abiotic reduction of organic contaminants in anoxic environments /." Zürich : ETH, 2007. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=17155.

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17

Vahedi, Hooshang. "Catalytic symmetric oxidation of sulfides to sulfoxides mediated by 3-substituted-1,2-benzisothiazole 1,1-dioxides." Thesis, University of Liverpool, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367257.

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18

Lippert, Cameron A. "Redox-active ligand-mediated radical coupling reactions at high-valent oxorhenium complexes: reactions relevant to water oxidation for artificial photosynthesis." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/41199.

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The making and breaking of O-O bonds has implications ranging from artificial photosynthesis and water oxidation to the use of O₂ as a selective, green oxidant for transformations of small molecules. Oxidative generation of O₂ from coupling of two H₂O molecules remains challenging, and well defined systems that catalytically evolve O₂ are exceedingly rare. Recent theoretical studies have invoked metal oxyl radicals (L[subscript n]M=O*) containing a singly occupied M-O π-type orbital as precursors to O-O bond forming events in both biological and synthetic water oxidation catalysts. However, th

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19

Zhang, Lei 1970. "Sol-gel matrix-mediated synthesis of superparamagnetic iron oxide clusters and supported iron porphyrin oxidation catalysts." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/9968.

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20

Gladman, Calvin. "Ferricyanide Mediated Microbial Respiration - Application to the Analysis of Waters and Wastewaters." Thesis, Griffith University, 2011. http://hdl.handle.net/10072/367669.

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A novel rapid respiration-based bioassay for the quantitative determination of microbial oxidation of organic substrate in wastewaters has been developed. By replacing oxygen as the terminal electron acceptor with the ferricyanide ion during microbial respiration, the rate and extent of the biochemical reaction (i.e. oxidation of substrate) was significantly increased. This was due to the high solubility of the ferricyanide ion in solution, thereby allowing the use of substantially larger populations of microorganisms in the assay without rapid depletion of the electron acceptor during respira

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21

Firth, Carole Anne. "7,8-Dihydroneopterin-mediated protection of low density lipoprotein, but not human macrophages, from oxidative stress." Thesis, University of Canterbury. Biological Sciences, 2006. http://hdl.handle.net/10092/1317.

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Any lipoproteins and cells present in the inflammatory environment of atherosclerotic plaques are likely to be exposed to high levels of oxidative stress. As 7,8-dihydroneopterin (7,8-NP) is synthesized by interferon-Î³ (IFN-Î³)-activated macrophages, this pteridine is also thought to exist at sites of inflammation. 7,8-NP s in vivo role remains controversial, but numerous in vitro studies have identified a radical scavenging activity. The possibility of 7,8-NP protecting against oxidative damage in inflammatory environments like plaque was investigated in this thesis. Both human monocyt

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22

Wang, Jin. "A mechanistic study of the preferential photo-oxidation of the 5-CH3 substituent of thymine and thymidine mediated by NH4(VO(O2)2(5-NO2phen))." HKBU Institutional Repository, 2009. http://repository.hkbu.edu.hk/etd_ra/1056.

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23

Dang, Zheng. "The Investigation of Carboxyl Groups of Pulp Fibers during Kraft Pulping, Alkaline Peroxide Bleaching, and TEMPO-mediated Oxidation." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/16143.

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Over the past 10 years, growing concerns over the modification of fibers have led researchers to focus on enriching the carboxyl group content of fibers by chemical oxidation and topochemical grafting. The current series of experiments continues this line of research by investigating the carboxyl group content of fibers during kraft pulping, alkaline peroxide bleaching, and 2,2,6,6-tetrametyl-1-piperidinyloxy radical (TEMPO)-KBr-NaClO oxidation system. The first experiment characterizes changes in the carboxyl group content of fibers for two sets of kraft pulps: 1) conventional laboratory coo

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24

Sopaci, Saziye Betul. "Microorganism Mediated Stereoselective Bio-oxidation And Bio-hydrogenation Reactions And Thiamine Pyrophosphate Dependent Enzyme Catalyzed Enantioselective Acyloin Reactions." Phd thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/2/12610516/index.pdf.

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In this study various microbial and enzymatic methods developed for enantioselective acyloin synthesis for preparation of some pharmaceutically important intermediates. By performing Aspergillus flavus (MAM 200120) mediated biotransformation, enantioselective bio-oxidation of meso-hydrobenzoin was achieved with a high ee value (76%). Racemic form of hydrobenzoin was also employed for the same bio-oxidation process and this bioconversion was resulted in accumulation of meso form (&gt<br>90% yield) confirming the suggested mechanism of oxidation-reduction sequence of hydrobenzoin. Wieland-Miesch

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25

Diering, Simon [Verfasser], and Friederike [Akademischer Betreuer] Cuello. "The impact of protein oxidation on kinase-mediated phosphorylation and cardiac myocyte contractile function / Simon Diering ; Betreuer: Friederike Cuello." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2019. http://d-nb.info/1182537863/34.

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26

Salem, Mohamed M. A. "H2O2-mediated oxidation and nitration enhances DNA binding capacity / DNA repair via up-regulated epidermal wild-type p53 in vitiligo." Thesis, University of Bradford, 2009. http://hdl.handle.net/10454/3348.

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The entire epidermis of patients with vitiligo exhibits accumulation of up to 10-3M concentrations of hydrogen peroxide (H2O2) (Schallreuter, Moore et al. 1999). Over the last decade our group and others have focused on the effect of H2O2-mediated oxidative stress on the function of many proteins and peptides due to oxidation of target amino acid residues in their structure including L-methionine, L-tryptophan, L-cysteine and seleno cysteine (Rokos, Beazley et al. 2002; Gillbro, Marles et al. 2004; Hasse, Kothari et al. 2005; Schallreuter, Chavan et al. 2005; Spencer, Chavan et al. 2005

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27

Li, Qing Qing. "Nanocellulose: Preparation, Characterization, Supramolecular Modeling, and its Life Cycle Assessment." Diss., Virginia Tech, 2012. http://hdl.handle.net/10919/49556.

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Nanocellulose is a nascent and promising material with many exceptional properties and a broad spectrum of potential applications; hence, it has drawn increasing research interests in the past decade. A new type of nanocellulose -- with mono- or bi-layer cellulose molecular sheet thickness -- was synthesized through a combined chemical-mechanical process (TEMPO-mediated oxidation followed by intensive sonication), and this new material was named molecularly thin nanocellulose (MT nanocellulose). The overarching objective of this study was to understand the formation and supramolecular struct

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28

Aybey, Ayse. "Oxidative Ring Opening Reactions Of A-hydroxy Ketones." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/3/12609279/index.pdf.

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Chiral polyfunctionalized 1,5-dicarbonyl compounds are important synthetic intermediates and starting materials for many biologically active compounds so their synthesis has a great importance in the literature. In the first step, 1,3-cyclohexandione and other b-diketone derivatives are protected under acid catalyzation and their corresponding b-keto enol ether derivatives are obtained. These b-keto enol ethers are then converted to a-acetoxy enones in racemic form by Mn(OAc)3 mediated oxidation. Enzymatic kinetic resolution is applied to the racemic acetoxy enones by using different lipases

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29

Salem, Mohamed Metwalli AbouElloof. "H₂O₂-mediated oxidation and nitration enhances DNA binding capacity/DNA repair via up-regulated epidermal wild-type p53 in vitiligo." Thesis, University of Bradford, 2009. http://hdl.handle.net/10454/3348.

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The entire epidermis of patients with vitiligo exhibits accumulation of up to 10-3M concentrations of hydrogen peroxide (H₂O₂) (Schallreuter, Moore et al. 1999). Over the last decade our group and others have focused on the effect of H₂O₂-mediated oxidative stress on the function of many proteins and peptides due to oxidation of target amino acid residues in their structure including L-methionine, L-tryptophan, L-cysteine and seleno cysteine (Rokos, Beazley et al. 2002; Gillbro, Marles et al. 2004; Hasse, Kothari et al. 2005; Schallreuter, Chavan et al. 2005; Spencer, Chavan et al. 2005; Chava

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30

Carlsson, Daniel O. "Structural and Electrochemical Properties of Functionalized Nanocellulose Materials and Their Biocompatibility." Doctoral thesis, Uppsala universitet, Nanoteknologi och funktionella material, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-215090.

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Nanocellulose has received considerable interest during the last decade because it is renewable and biodegradable, and has excellent mechanical properties, nanoscale dimensions and wide functionalization possibilities. It is considered to be a unique and versatile platform on which new functional materials can be based. This thesis focuses on nanocellulose from wood (NFC) and from Cladophora algae (CNC), functionalized with surface charges or coated with the conducting polymer polypyrrole (PPy), aiming to study the influence of synthesis processes on structural and electrochemical properties o

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Salsman, Scott J. "Redox regulation of protein tyrosine phosphatases in cell membrane receptor-mediated signal transduction." Oklahoma City : [s.n.], 2005.

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32

Senocak, Deniz. "Chemoenzymatic Synthesis Of Chiral Hydroxymethyl Cycloalkenols." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12605056/index.pdf.

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Chiral cyclic alkenols with hydroxymethyl functionality are important structural units in many biologically active natural compouds such as prostaglandins, sesquiterpene antiviral agents, pentenomycins, xanthocidin, sarkomycin, etc. 1,3-cycloalkanediones are converted into bicyclic polyoxo derivatives with formaldehyde and trioxane in the presence of Lewis acid. Selective oxidation of the bicyclic compounds by using manganese(III)acetate followed by enzyme-catalyzed kinetic resolution afforded chiral bicyclic hydroxy ketones. Reduction of carbonyl group and cleavage of the ether functionality

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33

Maher, Christopher John. "Options for treatment of legacy and advanced nuclear fuels." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/options-for-treatment-of-legacy-and-advanced-nuclear-fuels(984fa9e5-3732-4f1b-b9b1-42457ef0f732).html.

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The treatment of advanced nuclear fuels is relevant to the stabilisation of legacy spent fuels or nuclear materials and fuels from future nuclear reactors. Historically, spent fuel reprocessing has been driven to recover uranium and plutonium for reuse. Future fuel cycles may also recover the minor actinides neptunium, americium and perhaps curium. These actinides would be fabricated into new reactor fuel to produce energy and for transmutation of the minor actinides. This has the potential to reduce the long lived radioactivity of the spent fuel and reprocessing high level waste, whilst also

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34

Silvers, Kimberly Jane. "The role of cytochrome P450-mediated C-oxidation and cytosolic nitroreduction in the metabolism, DNA binding, and mutagenicity of 1-nitropyrene in human liver." Case Western Reserve University School of Graduate Studies / OhioLINK, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=case1062512189.

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35

Offenbacher, Adam R. "Protein structural changes and tyrosyl radical-mediated electron transfer reactions in ribonucleotide reductase and model compounds." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/39473.

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Tyrosyl radicals can facilitate proton-coupled electron transfer (PCET) reactions that are linked to catalysis in many biological systems. One such protein system is ribonucleotide reductase (RNR). This enzyme is responsible for the conversion of ribonucleotides to deoxyribonucleotides. The beta2 subunit of class Ia RNRs contains a diiron cluster and a stable tyrosyl radical (Y122*). Reduction of ribonucleotides is dependent on reversible, long-distance PCET reactions involving Y122* located 35 Å from the active site. Protein conformational dynamics are postulated to precede diiron cluster ass

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36

Filosa, Angelo. "Study of locally unfolded forms of cytochrome c by Fourier transform infrared and of H2O2-mediated oxidation of ferricytochrome c and metmyoglobin by mass spectrometry." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/NQ63979.pdf.

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Kose, Elif. "Chemoenzymatic Synthesis Of 4-hydroxy Enones." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/1252519/index.pdf.

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Chiral cyclic polyoxo-ketones are important structural units in many natural products, biologically active compouds, such as prostaglandins, didemnenones, sarkomycin, punaglandin, clavulone, etc. In this work, a chemoenzymatic synthesis of both enantiomers of the &amp<br>#945<br>&rsquo<br>-acetoxy-&amp<br>#945<br>-methyl and &amp<br>#947<br>-hydroxy-&amp<br>#945<br>-methyl cyclic enones starting from &amp<br>#945<br>-methyl-&amp<br>#946<br>-methoxy cyclic enone is described. Manganese (III) acetate-mediated acetoxylation followed by the enzyme-mediated hydrolysis of &amp<br>#945<br>&rsquo<br>

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Aher, Ashish. "SYNTHESIS, CHARACTERIZATION AND APPLICATIONS OF REDUCED GRAPHENE OXIDE AND COMPOSITE MEMBRANES FOR SELECTIVE SEPARATIONS AND REMOVAL OF ORGANIC CONTAMINANTS." UKnowledge, 2019. https://uknowledge.uky.edu/cme_etds/111.

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Among the next generation materials being investigated for membrane development, partially reduced Graphene Oxide (rGO) has received increasing attention from the membrane community. rGO-based nanofiltration membranes have shown promising results in applications such as partial desalination, organic contaminant removal, gas-phase separations, and separations from solvent media. rGO offers a unique platform compared to common polymeric membranes since it can be used for separation applications in both aqueous and organic solvent media. An rGO-based platform could also be utilized to synthesize

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Mai, Trang. "FUNCTIONALIZATION OF IRON OXIDE NANOPARTICLES AND THE IMPACT ON SURFACE REACTIVE OXYGEN SPECIES GENERATION FOR POTENTIAL BIOMEDICAL AND ENVIRONMENTAL APPLICATIONS." UKnowledge, 2019. https://uknowledge.uky.edu/cme_etds/102.

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Iron oxide nanoparticles (IONPs) have been widely studied for a variety of applications, from biomedical applications (e.g., cell separation, drug delivery, contrast agent for magnetic resonance imaging and magnetically mediated energy delivery for cancer treatment) to environmental remediations (e.g., heavy metal removal and organic pollutants degradation). It has been demonstrated that IONPs can induce the production of reactive oxygen species (ROS) via Fenton/Haber-Weiss reactions which has been shown to be one of the key underlying mechanisms of nanoparticles toxicity. This inherent toxici

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Davidson, Stuart Cameron. "The development of organic peroxide mediated oxidations." Thesis, University of Strathclyde, 2018. http://digitool.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=30330.

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This thesis describes the development of two novel metal-free oxidations processes: a method to selective synthesis anti-diols directly from commercially available alkene starting materials and an organocatalytic sulfoxidation procedure using diketones as catalysts. Chapter 1 describes a novel metal-free method for the one-pot anti-dihydroxylation of alkenes to form diols using malonoyl peroxide 13. The reaction conditions were optimised and the scope of the optimal conditions were examined with a variety of stilbene, styrene and indene derivatives to give the corresponding anti-diols in good

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Ohleier, Alexia. "Nickel mediated negishi and oxidative couplings." Thesis, Toulouse 3, 2017. http://www.theses.fr/2017TOU30074/document.

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Ce projet de recherche porte sur la formation de nouvelles liaisons C-C et la production de produits chimiques valorisables grâce à l'utilisation de complexes de nickel chélatés. La première partie de cette thèse est dédiée à des complexes bis-phosphines de nickel employés comme catalyseurs pour le couplage croisé de Negishi. Le précatalyseur [(dcpp)Ni(n2-toluene)] (dcpp = 1,3 bis(dicyclohexylphosphino)propane) permet de coupler efficacement des chloro-arènes avec des organozinciques en utilisant de faibles charges catalytiques (0,2 mol% - 0,1 mol%) et des conditions douces (THF, 60 °C). Une é

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Grocock, Estella Louise. "Novel catalysts and mechanistic investigation in dioxirane-mediated oxidations." Thesis, Loughborough University, 2000. https://dspace.lboro.ac.uk/2134/33767.

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The work described in this thesis follows the development of a family of achiral trifluoroketones, which were studied for use as ketone catalysts for the in situ generation of dioxiranes. One of the ketones investigated was a novel solid phase polymer-bound ketone, which led to a new area for dioxirane generation that could be of particular use in industry. Oxidations were run under monophasic and biphasic solvent reaction systems, with emphasis on the former. Ranges of reactions, including epoxidation and alcohol oxidations were examined to test the efficiency of each ketone. It was found tha

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Godinho, Diana Anacleto. "Produção de nanocelulose para aplicação em papel de impressão e escrita." Master's thesis, [s.n.], 2017. http://hdl.handle.net/10316/83161.

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Dissertação de Mestrado Integrado em Engenharia Química apresentada à Faculdade de Ciências e Tecnologia<br>A presente tese de mestrado tem como principal objetivo a produção de nanocelulose 1 a partir de pasta kraft branqueada de eucalipto, para aplicação na matriz fibrosa do papel de impressão e escrita e posterior estudo da sua influência nas propriedades papeleiras. A “Indústria Papeleira” ao longo dos últimos anos tem vindo a otimizar o processo de produção de papel face ao aumento da competitividade, abrindo assim portas à investigação de novos materiais, com o objetivo de melhorar as pr

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Mansley, Tamsin E. "Iron(III) mediated oxidative cyclisations of substituted cyclopropanes." Thesis, University of East Anglia, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389223.

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Parry, Joel D. "Transcriptomic assessment of quinone mediated hepatic oxidative stress." Thesis, University of Leicester, 2007. http://hdl.handle.net/2381/30781.

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Quinone based drugs are complex structures with multiple chemical properties. Therefore in this work to further understand quinone toxicity in drugs simpler structures with defined chemistry were used as tools. To discern mechanistic insight transcriptomic investigations were undertaken in rat hepatocytes and in vivo mouse liver exposed to a range of prototypical quinines. Genes important in response to quinone exposure were identified and analysed using several bioinformatic tools. Transcriptomics in hepatocytes could not differentiate quinone redox effects from other interactions, although 2

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Horne, Susan C. "Free radical mediated oxidative stress in plant cancers." Thesis, Abertay University, 2006. https://rke.abertay.ac.uk/en/studentTheses/fcb5aadb-8ee1-43dd-bbd0-367b93d87d11.

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This project provides for the first time an in depth examination of oxidative stress and antioxidant protection in plant tissue cultures undergoing various stages of ageing and neoplastic progression towards a cancerous state. Two experimental systems were investigated: (1) <i>Beta Vulgaris</i> cultures comprising two fully habituated (cancerous), lines, one partially abituated line and a non-habituated cell line; (2) <i>Glycine max</i> cultures comprised of two similar aged (15 years) cell lines, one of which has lost the ability to produce pigments. Biochemical profiles of free radical activ

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Lo, Raquel. "Cystine-mediated oxidative defence in Lactobacillus reuteri BR11." Thesis, Queensland University of Technology, 2010. https://eprints.qut.edu.au/39608/1/Raquel_Lo_Thesis.pdf.

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Lactobacillus reuteri BR11 possesses an abundant cystine uptake (Cyu) ABC-transporter that was previously found to be involved in a novel mechanism of oxidative defence mediated by cystine. The current study aimed to elucidate this mechanism with a focus on the role of the co-transcribed cystathionine ã-lyase (Cgl). Growth studies of wild-type L. reuteri BR11 and mutants inactivated in cgl and the cystine-binding protein encoding gene cyuC showed that in contrast to the Cyu transporter, whose inactivation led to growth arrest in aerated cultures, Cgl is not crucial for oxidative defence. Howev

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Maheshwari, Himanshu. "Functional 1D mesochannels for Electrochemical Sensors." Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0267.

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Dans cette thèse, nous discutons de silice à mésoporosité verticale et ses méthodes de synthèses, ses propriétés caractéristiques et ses applications potentielles. Il s’agit d’un matériau particulièrement intéressant car il offre un accès direct au substrat sur lequel il est déposé au travers de mésopores et offre une grande variété d’applications telles que : la filtration à l’échelle moléculaire, la protection des surfaces d’électrodes, la détection améliorée de cations par électrochimie et électrochimiluminescence, le dépôt de nanofils isolés métalliques ou polymériques, les biocapteurs ADN

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Jain, Nikita. "Chiral hypervalent iodine mediated enantioselective oxidative dearomatization of naphthols." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/62521.

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This dissertation investigates and describes the hypervalent iodine mediated dearomatization of naphthols, thereby yielding diversity of spiro-heterocyclic compounds in both racemic and chiral form. The first part of this thesis discloses the synthesis of racemic spiropyrrolidines and spirolactams via oxidative amidation of corresponding naphtholic sulfonamides, employing DIB as the oxidant. Enantioselective variant of the same have been demonstrated by using in situ generated chiral hypervalent iodine to provide chiral spiropyrrolidines. A noteworthy side reaction discovered in the course o

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Hulcoop, David Geoffrey. "Manganese(III) acetate mediated domino oxidative free radical cyclisations." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.613805.

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