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Tesi sul tema "Peroxides"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 30 luglio 2024

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1

McDonald, Iain M. "Bicyclic peroxides : synthesis, structure and reactions." Thesis, Heriot-Watt University, 1987. http://hdl.handle.net/10399/1047.

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2

Gray, Norman. "The oxidation of arenethiols by peroxides." Thesis, University of Aberdeen, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328218.

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The oxidation of 4-substituted-benzenethiolate ions by hydrogen peroxide or <i>t</i>-butyl hydroperoxide gave the corresponding disulphide, sulphinic acid and sulphonic acid. With hydrogen peroxide the oxidation was of the second-order with p = -0.71 and showed a small positive salt effect. Benzenethiolate ion gave a small increase in rate with increasing solvent polarity and in 50% v/v dioxan at 25.0°C had ΔH<sup>dag</sup> 54.7 kJ mol<sup>-1</sup>, ΔS^dag -52.2 J mol^-1K^-1 and ΔG<sup>dag</sup> 70.2 kJ mol<sup>-1</sup>. 2-Nitrobenzenethiolate similarlygave ΔH^dag 39.7 kJ mol^-1, ΔS<sup>dag</s

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3

Dragan, Andrei. "Oxidations with endocyclic peroxides and their derivatives." Thesis, University of Strathclyde, 2016. http://digitool.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=27446.

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This thesis describes two novel transformations (a method to synthesize alkylidene phthalides and a different approach toward the Baeyer-Villiger oxidation) and the development and mechanistic study of a metal-free oxidation of arenes. Chapter 1 introduces the concept of alkene oxyamination. Synthesis of a series of hydroxylamine derivatives of endocyclic peroxides was undertaken, which were then reacted with nitrogen, sulfur and carbon nucleophiles. This led to the discovery of a new reaction that provides access to alkylidene phthalides, a class of compounds which exhibit interesting biologi

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4

Rawling, Michael J. "Metal-free syn-dihydroxylation of alkenes using malonoyl peroxides." Thesis, University of Strathclyde, 2013. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=25565.

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This thesis describes the successful application of cyclopropyl malonoyl peroxide II in the metal-free syn-dihydroxylation of alkenes I. Chapter 1 outlines the available metal-free methods for achieving syn-1,2- dioxygenation of alkenes. The use of hypervalent iodine, selenium, sulfur and peroxide reagents are discussed in terms of the advantages and limitations of each method. Chapter 2 details a mechanistic investigation into the dihydroxylation reaction using cyclopropyl malonoyl peroxide II. Through kinetic studies, Hammett analysis, multiple isotopic labelling experiments, NMR investigati

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5

Smith, David P. "Characterisation of peracids." Thesis, University of Cambridge, 1996. https://www.repository.cam.ac.uk/handle/1810/272276.

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6

Haq, Ahsanul. "The preparation of macrocyclic compounds by thermolysis of cyclic peroxides." Thesis, Heriot-Watt University, 1992. http://hdl.handle.net/10399/1491.

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7

DiPasquale, Antonio Giovanni. "Peroxide complexes of non-redox active metal centers : models for alternative mechanisms in cytochrome P450 oxidations? /." Thesis, Connect to this title online; UW restricted, 2006. http://hdl.handle.net/1773/11603.

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8

R, Morris Vernon. "An investigation of transient atmospheric inorganic peroxides : a theoretical and experimental study." Diss., Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/25857.

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9

Tribelhorn, Michael John. "Reactions of iron- and zinc-fuelled pyrotechnic systems." Thesis, Rhodes University, 1995. http://hdl.handle.net/10962/d1005003.

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A major industrial use of pyrotechnic compositions is as delay fuses in electric detonators. Suitable delay times may be achieved through (i) choice of chemical components (ii) adjustment of composition of the system chosen and, finally, (iii) adjustment of the length of fuse used. This study forms part of a survey of binary fuel/oxidant combinations in an attempt to provide some fundamental information on the first step above: (i) choice of chemical components. The complete survey has included studies of a single fuel in combination with one of a variety of oxidants, and studies of the oxidat

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10

Leahy, Christopher David. "The oxidation by peroxides of cyanides, cyanide complexes and related species." Thesis, Imperial College London, 1990. http://hdl.handle.net/10044/1/46407.

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11

Morgan, Richard Brierley. "Field studies of atmospheric peroxides and the development of sampling methods." Thesis, University of Leeds, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.410964.

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12

Stell, Jonathan Kendrew. "An E.S.R. study of the decomposition of peroxides by metal ions." Thesis, University of York, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.276493.

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13

Scrivens, Garry. "An EPR investigation into the catalytic oxidation of thiols by peroxides." Thesis, University of York, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284121.

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14

Bousejra-El, Garah Fatima. "Role of metals in the mechanism of action of antimalarial peroxides." Toulouse 3, 2010. http://thesesups.ups-tlse.fr/824/.

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Le cycle 1,2,4-trioxane de l'artémisinine est essentiel pour son activité antipaludique. Le fer(II) peut catalyser la réaction de réduction de la liaison peroxyde de l'artémisinine et conduire à la formation de radicaux. Ces radicaux alkylent l'hème libéré lors de la dégradation de l'hémoglobine par Plasmodium pour former des produits de couplage appelés adduits hème-artémisinine. Ce processus d'alkylation pourrait être directement ou indirectement responsable de la mort du parasite. La connaissance du mécanisme d'action de l'artémisinine est le point de départ de ce projet de thèse qui se div

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15

Naseem, Khalid Malik. "The influence of lipoproteins and peroxides on platelet activation and inhibition." Thesis, University College London (University of London), 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.718859.

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16

Fertinger, Christoph [Verfasser], and Rudi van [Akademischer Betreuer] Eldik. "Activation of Peroxides by Model Systems for Cytochrome P450 = Aktivierung von Peroxiden an Modellsystemen für Cytochrom P450 / Christoph Fertinger. Betreuer: Rudi van Eldik." Erlangen : Universitätsbibliothek der Universität Erlangen-Nürnberg, 2011. http://d-nb.info/1015475159/34.

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17

Červený, Ladislav. "Reaktivní extruze polymerů s využitím peroxidů." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2021. http://www.nusl.cz/ntk/nusl-449699.

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Diploma thesis deals with processing of two types of PP, HDPE, LDPE, PET, PA, PS, PMMA and ABS by reactive extrusion in presence of peroxides. The theoretical part summarizes existing knowledge about processing of used polymers. Reactive extrusion was carried out with a single screw extruder at 260 °C, 30 rpm and 60 rpm depending on peroxide used. One type of PP was processed in presence of Luperox 101, hydrogen peroxide, dicumyl peroxide and potassium persulfate. Luperox 101 and hydrogen peroxide were chosen for reactive extrusion of other polymers. The efficiency of selected peroxides on rad

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18

Gerbig, Oliver [Verfasser], and Joachim [Akademischer Betreuer] Maier. "Defect chemistry in alkali peroxides and superoxides / Oliver Gerbig. Betreuer: Joachim Maier." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2014. http://d-nb.info/1062951441/34.

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19

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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20

Pan, Yilan, and 潘怡兰. "Studies on fluorescent probes for the detection of peroxynitrite and hypochlorous acid." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B45515335.

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21

Chen, Yingche, and 陈映澈. "Studies on FRET-based fluorescent probes for the detection of peroxynitrite." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B46924334.

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22

Clarke, Carole Anne. "The anti-algal activity of peroxygen compounds." Thesis, University of Bath, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.280884.

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23

Ennis, Julie N. "Mechanisms and applications of dioxirane chemistry." Thesis, Loughborough University, 1998. https://dspace.lboro.ac.uk/2134/33113.

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Dimethyldioxirane oxidises nitrogen-containing substrates. The sites of oxidation are generally the sp3 nitrogen atoms in the molecules although other reactive groups can be oxidised if present. An indication of the reactivity of different dioxiranes was obtained qualitatively from the polarographic peak reduction potentials and quantitatively by reaction with the model substrate 4-nitro-N,N-dimethylaniline. The polarographic peak potentials were shown to be of a similar order to those of typical acyclic peroxides. The rank order in terms of reactivity was shown to be methyl(trifluoromethyl)di

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24

Gupta, Rajat. "Is breakdown of fatty acid peroxides involved in the induction of apolipoprotein A1?" Master's thesis, University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5752.

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Over the past few years the number of deaths caused due to cardiovascular diseases has been increasing and is of major concern. In the United States, 75% of cardiovascular-related deaths have been attributed to atherosclerosis. Western diets containing large quantities of peroxidized lipids are considered atherogenic. Heated oil in the form of fried food brings high levels of peroxidized fat and its decomposition products in the diet. Peroxidized lipids are known to increase the susceptibility of serum lipoproteins to undergo oxidatio

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25

Nissen, Jan Hendrick [Verfasser]. "Perfluorinated Dialkyl Peroxides : Their Properties And Syntheses From Perfluoroalkyl Hypohalites / Jan Hendrick Nissen." Berlin : Freie Universität Berlin, 2021. http://d-nb.info/1229436731/34.

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26

Andia, Alexander A. "Addition of Molecular Oxygen to Alkenes| Chemical and Biological Applications of Organic Peroxides." Thesis, New York University, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10929113.

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<p> Molecular oxygen is an ideal source of oxygen atoms for synthetic transformations because it is inexpensive, abundant, and non-toxic. This dissertation presents the development of synthetic methods to oxidize alkenes to α-oxygenated ketones, hydroperoxides, alcohols, and endoperoxides using molecular oxygen under transition-metal or ambient-light catalysis. Chapter One describes a copper-catalyzed method to afford α-oxygenated ketones that can be further functionalized to give a variety of products. Chapter Two offers a light-catalyzed method for the synthesis of hydroperoxides

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27

Chung, Nga-wai. "Applications of regioselective intramolecular oxidation by dioxirane generated in situ : stereoselective synthesis of substituted tetrahydropyrans and fluorescence probes for peroxynitrite /." View the Table of Contents & Abstract, 2004. http://sunzi.lib.hku.hk/hkuto/record/B30575618.

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28

Aboua, Yapo Guillaume. "The impact of organic hydroperoxides and a red palm oil supplemented diet on spermatogenesis, sperm function and sperm apoptosis." Thesis, Cape Peninsula University of Technology, 2009. http://hdl.handle.net/20.500.11838/1523.

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Thesis (DTech (Biomedical Technology))--Cape Peninsula University of Technology, 2009<br>Many environmental, physiological, and genetic factors have been shown to impair sperm function through oxidative damage. Oxidative stress (OS) arises as a consequence of excessive reactive oxygen species (ROS) production and/or impaired antioxidant defence mechanisms. The decline in male reproductive health generated considerable public and scientific concerns about the possible role of environmental contaminants. A better understanding of how OS affects sperm function will be beneficial as it might help

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29

Almeida, Letícia Cunha Amaral Gonzaga de [UNESP]. "Análise do efeito clareador e da sensibilidade pós operatória utilizando diferentes materiais clareadores e fontes de luz." Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/89608.

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Made available in DSpace on 2014-06-11T19:24:07Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-03-20Bitstream added on 2014-06-13T20:11:58Z : No. of bitstreams: 1 gonzaga_lca_me_araca.pdf: 772898 bytes, checksum: a490bb43e9735c3542d945420fe1e996 (MD5)<br>O clareamento dental tem sido empregado por muitos profissionais por acreditarem ser uma técnica segura e eficaz. Contudo, com o objetivo de acelerar e potencializar o processo clareador, o uso de peróxidos em altas concentrações está sendo associado a fontes de calor e/ou luz. A combinação de materiais clareadores altamente concentr

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30

Johnson, Kathryn Michelle. "A mechanistic investigation into the reaction of haem proteins with peroxides and related compounds." Thesis, University of York, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.359272.

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31

Baker, Ruletha Deon Goodwin Douglas C. "Roles of an 'inactive' domain in catalase-peroxidase catalysis modulation of active site architecture and function by gene duplication /." Auburn, Ala., 2006. http://repo.lib.auburn.edu/2006%20Fall/Dissertations/HARTFIELD-BAKER_RULETNA_19.pdf.

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32

Chung, Nga-wai, and 鍾雅慧. "Applications of regioselective intramolecular oxidation by dioxirane generated in situ: stereoselective synthesisof substituted tetrahydropyrans and fluorescence probes forperoxynitrite." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B45014735.

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33

Ahn, Chang-Ho. "Mechanism of action of prostaglandin endoperoxide (U46619) and trimetoquinol on human platelet function /." The Ohio State University, 1985. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487261553057595.

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34

Parsons, Jason Luke. "The mechanism of genotoxicity of potassium bromate." Thesis, University of Birmingham, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364521.

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35

Loew, Noya. "Meerrettich Peroxidase : Modifikationen und Anwendungen in Biosensoren." Phd thesis, Universität Potsdam, 2008. http://opus.kobv.de/ubp/volltexte/2008/1843/.

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Biosensoren werden oft für die Messung einzelner Substanzen in komplexen Medien verwendet, wie z.B. bei der Blutzuckerbestimmung. Sie bestehen aus einem physikochemischen Sensor, dem Transduktionselement, und einer darauf immobilisierten biologischen Komponente, dem Erkennungselement. In dieser Arbeit wurde als Transduktionselement eine Elektrode und als Biokomponente das Enzym „Meerrettich Peroxidase“ (engl. horseradish peroxidase, HRP) verwendet. Solche HRP-Elektroden werden für die Messung von Wasserstoffperoxid (H2O2) eingesetzt. H2O2 wird im Körper von weißen Blutkörperchen produziert, um

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36

Magagula, Sifiso Innocent. "The effect of organic peroxides on the molecular composition of heterophasic ethylene-propylene impact copolymers." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/97850.

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Thesis (MSc)--Stellenbosch University, 2015.<br>ENGLISH ABSTRACT: Heterophasic ethylene-propylene copolymers, also known as impact polypropylene (PP) copolymers (IPCs) or heterophasic copolymers (HECOs), are a unique group of polyolefins produced through the copolymerisation of ethylene and propylene, with the aim of improving the impact properties of the PP homopolymer at low temperatures. Therefore, this polymer comprises of a PP homopolymer matrix with a dispersed rubbery copolymer phase. Due to their unique properties, HECO polymers have become commercially important materials, with a wide

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37

Chaves, Tiago Alexandre Guedes. "Influência dos sistemas de luz/laser no branqueamento dentário." Master's thesis, [s.n.], 2014. http://hdl.handle.net/10284/4606.

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Projeto de Pós-Graduação/Dissertação apresentado à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Mestre em Medicina Dentária<br>O branqueamento dentário é um dos procedimentos cosméticos menos invasivos, com efeitos relativamente imediatos e previsíveis. Perante uma procura crescente por parte dos pacientes e uma oferta muito variada das marcas disponíveis no mercado, existem ainda poucas evidências científicas da eficácia clínica das várias técnicas, sobretudo das que recorrem ao uso de aparelhos de luz. O sucesso clínico de um branqueamento dentário depende

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38

Hoffman, Amy Jo Gray Harry B. Hoffmann Michael R. "Photocatalytic reactions on quantum-sized semiconductor colloids : photoinitiated polymerization of vinylic monomers, formation of hydrogen peroxide and organic peroxides, oxidation of carboxylic acids, and synthesis of humic-like material /." Diss., Pasadena, Calif. : California Institute of Technology, 1993. http://resolver.caltech.edu/CaltechETD:etd-09272005-134829.

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39

FREITAS, ANTONIO A. de. "Recuperação de tório e terras raras via peróxido do resíduo originado na unidade de purificação de tório." reponame:Repositório Institucional do IPEN, 2008. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11692.

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Made available in DSpace on 2014-10-09T12:54:49Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:07:33Z (GMT). No. of bitstreams: 0<br>Dissertação (Mestrado)<br>IPEN/D<br>Instituto de Pesquisas Energéticas e Nucleares - IPEN/CNEN-SP

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40

Rothbart, Sabine [Verfasser], and Rudi van [Akademischer Betreuer] Eldik. "Mechanistic investigations on the activation of peroxides by manganese compounds / Sabine Rothbart. Betreuer: Rudi van Eldik." Erlangen : Universitätsbibliothek der Universität Erlangen-Nürnberg, 2012. http://d-nb.info/1022737236/34.

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41

Mekarbane, Pierre Gabriel. "An ESR-spin-trapping study of radicals formed during the thermolysis of organic peroxides in solution." Thesis, Lancaster University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286991.

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42

Stiasny, Benedikt [Verfasser], and Thomas M. [Akademischer Betreuer] Klapötke. "Investigation of organic peroxides and their properties as energetic materials / Benedikt Stiasny ; Betreuer: Thomas M. Klapötke." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2016. http://d-nb.info/1151449148/34.

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43

Shields, Dylan J. "Photochemistry of Organic Azides, Quinones, and Peroxides in Solution, Crystals, Super Molecular Complexes and Cryogenic Matrices." University of Cincinnati / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ucin157441745178423.

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44

Gulzar, Naeem [Verfasser], and Martin [Akademischer Betreuer] Klußmann. "C–H Functionalization Via Photochemically Generated Peroxides: Method Development and Mechanistic Studies / Naeem Gulzar. Gutachter: Martin Klußmann." Köln : Universitäts- und Stadtbibliothek Köln, 2014. http://d-nb.info/1064693385/34.

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45

Bråred, Christensson Johanna. "Clinical and experimental studies on oxidized fragrance terpenes as contact allergens /." Göteborg : Department of Dermatology and Venereology, Sahlgrenska University Hospital, Institute of Clinical Sciences at Sahlgrenska Academy, University of Gothenburg, 2009. http://hdl.handle.net/2077/19052.

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46

Kozak, Allyson Jill. "The balance of nitric oxide and peroxynitrite in the heart during organ preservation." View abstract, 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:3295438.

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47

Mohd, Esah Effarizah. "The effect of metal peroxides on the survival of campylobacter jejuni and the role of CorA in magnesium uptake." Thesis, University of Surrey, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.604031.

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Abstract (sommario):

The initial aim of this study was to investigate the potential of oxygen releasing compounds as an antimicrobial treatment to reduce the transmission of C. jejuni. C. jejuni was highly sensitive to Mg02 Ca02 and 2Na2CO3H202 when exposed to these compounds in Maximum Recovery Diluent (MRD), Ultra Heat Treated (UHT) skimmed milk and soil microcosms. in MRD, initial counts of 1 x 107 colony forming units per ml fell to undetectable levels in 32, 8 and 4 hours in the presence of 0.26, 2.6 and 5.2 mM Mg02 respectively. The same reduction in viability of C. jejuni was seen within 10 minutes and 30 m

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48

Ma, Kangming 1965. "Peroxide value and trans analyses by Fourier transform infrared (FTIR) spectroscopy." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=36643.

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New Fourier transform infrared (FTIR) approaches for the quantitative determination of peroxide value (PV) and isolated trans analyses were investigated and developed. The FTIR-PV methods investigated were all based on the stoichiometric reaction of hydroperoxides and triphenylphosphine (TPP) which converts TPP to triphenylphosphine oxide (TPPO). A reference transmission cell (100 mum) method was developed based on the use of a unique TPPO absorption at 542 cm-1. This method covered PV values from 0--15 PV and was shown to be superior in accuracy and reproducibility to the standard American Oi

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49

Ticha, Lawrence Awa. "Development of amperometric biosensor with cyclopentadienylruthenium (II) thiolato schiff base self-assembled monolayer (SAM) on gold." Thesis, University of the Western Cape, 2007. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_5394_1341319478.

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A novel cyclopentadienylruthenium(II) thiolato Schiff base, [Ru(SC6H4NC(H)C6H4OCH2CH2SMe)(&eta<br>5-C2H5]2 was synthesized and deposited as a selfassembled monolayer (SAM) on a gold electrode. Effective electronic communication between the Ru(II) centers and the gold electrode was established by electrostatically cycling the Shiff base-doped gold electrode in 0.1 M NaOH from -200 mV to +600 mV. The SAMmodified gold electrode (Au/SAM) exhibited quasi-reversible electrochemistry. The integrity of this electro-catalytic SAM, with respect to its ability to block and electro-catalyze certain Farada

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50

Dubois, Janie. "Determination of peroxide value and anisidine value using Fourier transform infrared spectroscopy." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=23391.

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Abstract (sommario):

Lipid oxidation has important consequences in the edible oil industry, producing compounds with sensory impact and thus reducing the economic value of the products. This work focused on the development of two Fourier transform infrared (FTIR) spectroscopy methods for the measurement of peroxide value (PV) and anisidine value (AV), representing the primary and secondary oxidation products of edible oils.<br>The infrared method developed for PV determination was based on a mathematical treatment by the partial least squares method of the information contained in the spectral region between 3750

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