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Dissertations / Theses on the topic 'Hot oxidation'

Author: Grafiati

Published: 31 May 2025

Last updated: 31 July 2025

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1

Hurd, Timothy John. "The oxidation and hot corrosion behaviour of a platinum enriched superalloy." Thesis, University of Liverpool, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297365.

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2

Ladak, Sam. "Hot electron transport and barrier oxidation effects in magnetic tunnel junctions." Thesis, University of Exeter, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.425319.

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3

Wang, Yiguang. "POLYMER-DERIVED SI-AL-C-N CERAMICS:OXIDATION, HOT-CORROSION, AND STRUCTURAL EVOLUTION." Doctoral diss., University of Central Florida, 2006. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4214.

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Polymer-derived ceramics are a new class of materials synthesized by thermal decomposition of polymer precursors. Previous studies have shown that the materials exhibit excellent thermo-mechanical properties and can be stable at temperatures up to 2000oC. Furthermore, the novel polymer-to-ceramics process enables the manipulation of the ceramic structures at the atomic/nano level by designing the chemistry of polymer precursors and controlling the pyrolysis conditions, thereby, the properties of ceramics. In this dissertation, oxidation/hot-corrosion behavior and the structural evolution of Si

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4

Gao, Wei. "Oxidation of nitride-bonded silicon carbide (NBSC) and hot rod silicon carbide with coatings." Thesis, University of Strathclyde, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366751.

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5

Lee, Moonyong. "In-situ morphological study of wustite scale growth in a hot stage environment SEM /." The Ohio State University, 1986. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487266011224367.

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6

Jonnalagadda, Krisha Praveen. "Failure mechanisms in APS and SPS thermal barrier coatings during cyclic oxidation and hot corrosion." Licentiate thesis, Linköpings universitet, Konstruktionsmaterial, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-134379.

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Thermal Barrier Coatings (TBCs) are advanced material systems that are being used in the hot sections of gas turbines such as combustor, turbine blades, and vanes. The top ceramic coating in TBCs provides insulation against the hot gases and the intermediate metallic bond coat provides oxidation and corrosion resistance to the underlying turbine components. Durability of thermal barrier coatings is very important for the overall performance of the gas turbine. TBCs can fail in several different ways and there is a combination of more than one failure mechanism in most situations. One of the mo

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7

O'Neill, Daniel Scott Materials Science &amp Engineering Faculty of Science UNSW. "An investigation of surface hot shortness in low carbon steel." Awarded by:University of New South Wales. Materials Science and Engineering, 2002. http://handle.unsw.edu.au/1959.4/18274.

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A series of model steels containing copper levels up to 0.48wt%, nickel up to 0.22wt% and silicon levels of 0.52wt% were oxidised in air at 1050 and 1150??C, and in a CO2-N2 mixture at 1250??C for times of up to 3 hours. The scaling kinetics were measured and the behaviour of copper-rich phase formation at the scale/metal interface was investigated. When oxidised at 1050/1150??C, significant quantities of copper-rich phase were observed for most model steels. The relatively high oxidation rate under these conditions led to the rapid development of a copper-rich layer with little copper diffusi

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Zahiri, Azar Maryam. "Early Stage Hot Corrosion Behavior of Pt/Cr-Modified ß-NiAl Alloys at 700°C." Case Western Reserve University School of Graduate Studies / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=case1434558093.

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9

Jung, Sung Hoon. "The effects of asphalt binder oxidation on hot mix asphalt concrete mixture rheology and fatigue performance." [College Station, Tex. : Texas A&M University, 2006. http://hdl.handle.net/1969.1/ETD-TAMU-1754.

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10

Guyer, Douglas Edward. "Oxidation and hot corrosion of Pt- and Si-modified Ni-18Al-10Cr-0.1Hf and comparison compositions." [Ames, Iowa : Iowa State University], 2010. 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:1475924.

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11

Koski, K. (Kristian). "Structural studies on the enzymatic units of the peroxisomal multifunctional enzyme type 2 (MFE-2)." Doctoral thesis, University of Oulu, 2004. http://urn.fi/urn:isbn:9514274652.

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Abstract Multifunctional enzyme type 2 (MFE-2) is a peroxisomal enzyme participating in the breakdown of fatty acids in eukaryotes. Depending on the organism, MFE-2 is composed of two to four functional units, out of which the two enzymatic ones, 2-enoyl-coenzyme A (CoA) hydratase 2 and (3R)-hydroxyacyl-CoA dehydrogenase, are found in the all MFE-2s. These units are responsible for the catalysis of the second and third steps of the peroxisomal β-oxidation of various CoA thioesters of fatty acids and fatty acyl derivatives. Their (R)-stereospecificity and ability to accept a broad range of fatt

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12

Tsaur, Charng-Cheng. "High temperature oxidation and NaCl-induced accelerated corrosion of hot-dip aluminized 9Cr-1Mo and 310 stainless steel." Texas A&M University, 2004. http://hdl.handle.net/1969.1/1375.

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The behaviors of high temperature corrosion on hot-dip aluminized on 9Cr-1Mo and 310 stainless steels when catalyzed by NaCl and cyclic heating environment were studied experimentally. The corrosion behavior and morphological development were investigated by weight gain kinetics, metallographs, depths of attack, metal losses, and X-ray analyses. The results of 310SS deposited with salt mixtures show that weight gain kinetics in simple oxidation reveals a steady-state parabolic rate law after 3 hr, while the kinetics with salt deposits display multi-stage growth rates. NaCl is the main corrosiv

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13

Mohan, Prabhakar. "Environmental Degradation of Oxidation Resistant and Thermal Barrier Coatings for Fuel-Flexible Gas Turbine Applications." Doctoral diss., University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3013.

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The development of thermal barrier coatings (TBCs) has been undoubtedly the most critical advancement in materials technology for modern gas turbine engines. TBCs are widely used in gas turbine engines for both power-generation and propulsion applications. Metallic oxidation-resistant coatings (ORCs) are also widely employed as a stand-alone protective coating or bond coat for TBCs in many high-temperature applications. Among the widely studied durability issues in these high-temperature protective coatings, one critical challenge that received greater attention in recent years is their resist

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14

Lima, Luiz Gustavo Del Bianchi da Silva. "Análise experimental e modelagem numérica da influência da oxidação na fadiga térmica de cilindros de laminação a quente." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/3/3151/tde-23052018-081121/.

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Embora a literatura disponível sobre conformação mecânica disponha de grande número de trabalhos relacionados à fadiga térmica em cilindros de laminação a quente, poucos autores abordam como esse tipo de dano é influenciado por algumas características do processo - em especial a oxidação na superfície de trabalho dos cilindros, tanto enquanto formação de uma camada de óxido uniforme sobre essa superfície quanto na forma de corrosão. Essa lacuna ocorre a despeito do volume de referências que relacionam a oxidação à fadiga térmica em escala laboratorial. O presente trabalho busca relacionar amba

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15

MORAIS, DANIEL S. "Cinetica e mecanismo de oxidacao de ceramicas a base de nitreto de silicio com adicao de terras raras." reponame:Repositório Institucional do IPEN, 1998. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10693.

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16

Dorgans, Céline. "Study of interactions between glass and tungsten during glass hot forming processes." Grenoble INPG, 2010. http://www.theses.fr/2010INPG0022.

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Lors du formage des seringues, l'interaction entre le verre et le tungstène de l'outil conduit à des phénomènes combinés d'oxydation et d'usure, et à la contamination de la seringue par le tungstène. Ceci peut entraîner des réactions indésirables avec les solutions médicamenteuses. L'étude de l'oxydation et usure à chaud de l'outil en tungstène a été réalisée dans l'air et dans le verre, dans des conditions statiques et cycliques, lors d'expériences spécifiques et lors du procédé industriel. Couplée à la caractérisation des différents oxydes présents à la surface des seringues, elle a permis d

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17

Sanviemvongsak, Tom. "Oxydation et corrosion à haute température de superalliages à base de nickel issus de la fabrication additive." Thesis, Toulouse, INPT, 2020. http://www.theses.fr/2020INPT0066.

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La résistance à l’oxydation isotherme et cyclique de l’alliage 718 produit par le procédé de fusion sélective par faisceau laser (LBM) et par faisceau d’électrons (EBM) a été comparée à celle de l’alliage 718 forgé (AMS5662). Les essais d’oxydation isotherme à 850 °C sous air ont montré des tenues à l’oxydation similaires en termes de prise de masse et d’oxydation intergranulaire pour les trois alliages. L’effet de la rugosité sur les cinétiques d’oxydation a été quantifié et il a été démontré que la cinétique d’oxydation intergranulaire suit le modèle de Wagner de l’oxydation interne avec un

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GUEDES, e. SILVA CECILIA C. "Estudo de sinterizacao de nitreto de silicio com adicoes dos oxidos de lantanio, gadolinio e aluminio." reponame:Repositório Institucional do IPEN, 2000. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10808.

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19

Parezanović, Ivana. "Selective oxidation and segregation in commercial steels and model alloys (tools for improving the surface wettability by liquid Zn during hot dip galvanizing)." [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=979088933.

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20

Grégoire, Benjamin. "Functionalization of aeronautical thermal barrier systems elaborated by slurry (FONBAT)." Thesis, La Rochelle, 2017. http://www.theses.fr/2017LAROS023/document.

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La sélection des matériaux utilisés dans les moteurs aéronautiques est un enjeu majeur pour assurer la sécurité des passagers, optimiser les performances de l’avion et maîtriser les coûts. Dans les parties les plus chaudes des moteurs (i.e. chambre de combustion et turbine), les pièces sont généralement constituées de superalliages à base nickel en raison de leurs excellentes propriétés mécaniques à haute température. Vulnérables aux phénomènes de corrosion et d’oxydation à haute température, les superalliages doivent la plupart du temps être revêtus afin de prolonger leur durée de vie (ingéni

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21

Kchaou, Mohamed. "Influence du couplage frottement-oxydation sur l’usure d’un acier à outil de travail à chaud : développement d’un tribomètre spécifique au cyclage de matriçage." Thesis, Ecole centrale de Lille, 2010. http://www.theses.fr/2010ECLI0030/document.

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L’amélioration de la durée de vie des outillages de mise en forme à chaud constitue un enjeu industriel important et encore mal maitrisé. En effet, les sollicitations induites lors de la mise en forme mettent en jeu des couplages impliquant des phénomènes thermiques, mécaniques, tribologiques et physicochimiques. Les modes de dégradation engendrés sont multiples, principalement par déformation plastique, par fatigue thermomécanique, par frottement et par oxydation. Les dégradations par frottement demeurent parmi les plus pénalisantes et les plus difficiles à appréhender et à maîtriser compte t

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22

Lager, Louis-Jean. "Revêtements anti-oxydation haute température élaborés par un procédé hybride : texturation laser ultra-bref et dépôt sol-gel." Electronic Thesis or Diss., Ecully, Ecole centrale de Lyon, 2025. http://www.theses.fr/2025ECDL0001.

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L'industrie aéronautique contribue depuis des décennies à la réduction des émissions polluantes et en particulier à la décarbonation des aéronefs. Pour y parvenir, plusieurs approches complémentaires sont envisagées afin de respecter l'objectif de zéro émission de carbone équivalent CO2 à l'horizon 2050, fixé par les accords de Paris de la COP21. L'une d'entre elles consiste à améliorer les performances des turboréacteurs, ayant pour conséquence l'augmentation de leur température de fonctionnement. Cette optimisation possède plusieurs effets bénéfiques : une amélioration du rendement de compre

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23

Esiyok, Beatrice-Andreea [Verfasser], Heinz [Akademischer Betreuer] Köser, and Günter [Akademischer Betreuer] Scheffknecht. "Development of Au/TiO2-coated SCR-DeNOx catalysts with increased elemental mercury co-oxidation activity under hot and cold site power plant flue gas conditions / Beatrice-Andreea Esiyok ; Heinz Köser, Günter Scheffknecht." Halle, 2016. http://d-nb.info/112211107X/34.

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24

Hoyt, Kathryn Olivia. "Oxidation behavior of (Co,Mn)₃O₄ coatings on preoxidized stainless steel." Thesis, Montana State University, 2011. http://etd.lib.montana.edu/etd/2011/hoyt/HoytK0511.pdf.

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As global energy challenges grow, alternative energy technologies like fuel cells are being investigated. Solid Oxide Fuel Cells (SOFCs) provide the advantages of high energy conversion efficiency, low emissions, fuel flexibility and both portable and stationary application. High material cost and need for longer material lifespan still impede the wider use of SOFCs. To produce substantial voltage, planar SOFCs are joined into stacks using interconnects. Interconnects both separate and connect each individual fuel, separating gas flow and conducting current. For SOFCs that operate at less than

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25

TERNER, MATHIEU. "Innovative materials for high temperature structural applications: 3rd Generation γ-TiAl fabricated by Electron Beam Melting". Doctoral thesis, Politecnico di Torino, 2014. http://hdl.handle.net/11583/2527509.

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In the aeronautics industry, the propulsion systems stand among the most advanced and critical components. Over the last 50 years, gas turbine aeroengines were subjected to intensive research to increase efficiency and reduce weight, noise and harmful emissions. Together with design optimization, breakthrough in materials science for structural applications triggered the development of the most advanced gas turbine engines. For low temperatures, basically ahead of the combustion section, lightweight Ti alloys are preferred for their good mechanical properties. For high temperatures instead, Ni

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26

Kadri, Mekki. "Speciation d'isotopes d'uranium et de neptunium produits par irradiation neutronique." Université Louis Pasteur (Strasbourg) (1971-2008), 1988. http://www.theses.fr/1988STR13092.

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Determination de l'etat d'oxydation (speciation) des atomes de **(239)u formes par la reaction **(238)u(n,gamma ) et des atomes de **(239)np formes dans la desintegration beta de **(239)u. Les cibles irradiees sont des composes simples d'u et des complexes d'u avec les ethers crown des cryptanols et cyclam

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27

Muritala, Ibrahim Kolawole. "Investigation of trace components in autothermal gas reforming processes." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2018. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-232005.

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Trace component analysis in gasification processes are important part of elemental component balances in order to understand the fate of these participating compounds in the feedstock. Residual traces in the raw synthesis gas after quench could bring about the poisoning of catalysts and corrosion effects on plant facilities. The objective of this work is to investigate the effects of quenching operation on the trace components during test campaigns of the autothermal non-catalytic reforming of natural gas (Gas-POX) mode in the HP POX (high pressure partial oxidation) test plant. In order to ac

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28

Nilsonthi, Thanasak. "Caractérisation Physico-chimique et adhérence de couches d'oxydes thermiques sur des aciers recyclés." Phd thesis, Université de Grenoble, 2013. http://tel.archives-ouvertes.fr/tel-00947653.

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.L'objectif de cette étude était, en premier lieu, de mettre en place en Thaïlande un testd'adhésion par traction-écaillage sur une machine de traction classique (test" macroscopique "), de le comparer au test " microscopique " Grenoblois fonctionnant dansla chambre du MEB et de l'utiliser pour évaluer l'adhérence des calamines de process sur desaciers industriels. Deux paramètres ont été étudiés, la vitesse de déformation et la teneur desaciers en silicium. Il apparaît que l'écaillage des calamines au cours du test augmente quandaugmente la vitesse de déformation. Une vitesse de déformation é

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29

Zheng, Yifeng. "Studies on biological activities of low dose of phenethylamine from hot water extract of Chlorella pyrenoidosa." Doctoral thesis, Kyoto University, 2020. http://hdl.handle.net/2433/259745.

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京都大学<br>0048<br>新制・課程博士<br>博士(農学)<br>甲第22849号<br>農博第2432号<br>新制||農||1082(附属図書館)<br>学位論文||R2||N5309(農学部図書室)<br>京都大学大学院農学研究科応用生物科学専攻<br>(主査)教授佐藤健司, 教授澤山茂樹, 教授菅原達也<br>学位規則第4条第1項該当<br>Doctor of Agricultural Science<br>Kyoto University<br>DGAM

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30

N'gadjaga, Maimouna Djamila Sadio. "Influence and reliance of Chlamydia trachomatis on host glucose metabolism." Electronic Thesis or Diss., Sorbonne université, 2021. http://www.theses.fr/2021SORUS486.

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Les microorganismes à développement intracellulaire exercent une pression importante sur le métabolisme de leur hôte, car ils obtiennent tous leurs nutriments de son cytoplasme. Les bactéries intracellulaires obligatoires Chlamydia trachomatis en sont une illustration extrême : elles dépendent de leur hôte non seulement pour l’apport en glucose, leur source principale de carbone, mais probablement aussi, au moins partiellement, pour l’obtention de la monnaie énergétique issue du catabolisme du glucose, l’adénosine triphosphate (ATP). Ces bactéries effectuent un cycle de développement biphasiqu

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31

Cuco, Ana Patrícia Domingues. "Host-parasite interactions in environmental stress scenarios." Doctoral thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/22246.

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Doutoramento em Biologia<br>The overarching objective of this thesis was to explore ecologically relevant scenarios of contamination by agrochemical fungicides, in particular their interaction with disease (a ubiquitous and relevant natural stressor), using a host (Daphnia spp.) × parasite (Metschnikowia bicuspidata) system as an experimental model. Because parasites act as modulators of population dynamics and genetic diversity, interaction scenarios between disease and anthropogenic factors (namely pollution) are important to clarify. For this work, copper sulphate and tebuconazole we

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32

Bjur, Eva. "Virulence of Salmonella enterica serovar typhimurium and innate antibacterial host responses /." Stockholm, 2006. http://diss.kib.ki.se/2006/91-7140-946-7/.

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Andreß, Stefanie Heike [Verfasser]. "Auswirkungen von hochintensivem körperlichem Training (HIT) auf oxidativen Stress und DNA-Reparaturkapazität bei BRCA-Mutation / Stefanie Heike Andreß." Ulm : Universität Ulm, 2019. http://d-nb.info/1179226224/34.

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Perez-Rodriguez, Jacqueline. "ROLE OF OXIDATIVE STRESS AND T CELL HOMING IN THE DEVELOPMENT OF MURINE SYNGENEIC GRAFT-VERSUS-HOST DISEASE." UKnowledge, 2009. http://uknowledge.uky.edu/gradschool_diss/804.

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Syngeneic graft-versus-host disease (SGVHD) is induced by reconstituting lethally irradiated mice with syngeneic BM cells followed by a 21 day treatment with the immunosuppressive agent cyclosporine A (CsA). Clinical symptoms of the disease appear 2-3 weeks following cessation of CsA therapy and disease-associated inflammation occurs primarily in the colon and liver. The development of SGVHD is a complex process resulting from the cooperative interaction of multiple effector cell populations including NK cells, T cells and macrophages. TH1 cytokines (IL-12, TNF-α, IFN- γ), produced by these ef

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Le, Tan Ngoc Linh. "Mesure d’intermédiaires réactionnels (HO2, H2O2, CH2O) par CRDS lors de la combustion du n-butane et de l’éther di-méthylique et simulations cinétiques." Thesis, Orléans, 2015. http://www.theses.fr/2015ORLE2027.

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La mesure de la formation de HO2 et H2O2 lors de l’oxydation de carburant est très difficile. Par contre, elle est extrêmement importante pour déterminer l’importance relative des voies de terminaison de chaînes de R + O2 et de ramification des chaînes menant à la production des radicaux OH. Par ailleurs, ces informations sont essentielles pour améliorer les modèles cinétiques. Afin de répondre à cette demande, un nouveau dispositif expérimental a été développé dans notre laboratoire : un réacteur auto-agité par jets gazeux couplé à un détecteur cw-CRDS qui permet d’analyser en ligne des produ

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Carlsson, Josef. "Dietärt intag av nitrat förbättrar inte prestationen i Coopers test hos löpare på motionsnivå." Thesis, Linnéuniversitetet, Institutionen för kemi och biomedicin (KOB), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-27757.

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Bakgrund. Nitrat är ett födoämne som fått stor uppmärksamhet inom forskningen de senaste åren. Studier påvisar blodtryckssänkande effekt, minskad syrekostnad vid submaximalt- och maximalt arbete. Det ökar samtidigt den muskulära verkningsgraden och kan därmed i idrottssammanhang ha eventuell positiv inverkan på prestationen. Syfte. Att undersöka om tre dagars uppladdning med nitrat i form av 7 cl rödbetsjuice (0,4 gram nitrat) om dagen, samt en fjärde dos på testdagen kan öka prestationen hos medeltränade löpare i ett Coopers test. Metod. En randomiserad dubbelblind placebo-kontrollerad korsa

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Marno, Daniel Richard [Verfasser]. "The Oxidation Capacity of the Summertime Asian Monsoon Anticyclone - Airborne measurements of OH and HO2 radicals in the Upper Troposphere using Laser Induced Fluorescence Spectroscopy / Daniel Richard Marno." Mainz : Universitätsbibliothek der Johannes Gutenberg-Universität Mainz, 2021. http://d-nb.info/1236341252/34.

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Nordqvist, Anneli. "Hit Identification and Hit Expansion in Antituberculosis Drug Discovery : Design and Synthesis of Glutamine Synthetase and 1-Deoxy-D-Xylulose-5-Phosphate Reductoisomerase Inhibitors." Doctoral thesis, Uppsala universitet, Avdelningen för organisk farmaceutisk kemi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-155428.

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Since the discovery of Mycobacterium tuberculosis (Mtb) as the bacterial agent causing tuberculosis, the permanent eradication of this disease has proven challenging. Although a number of drugs exist for the treatment of tuberculosis, 1.7 million people still die every year from this infection. The current treatment regimen involves lengthy combination therapy with four different drugs in an effort to combat the development of resistance. However, multidrug-resistant and extensively drug-resistant strains are emerging in all parts of the world. Therefore, new drugs effective in the treatment o

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Arens, Daniel Kurt. "Evolution and Selection: From Suppression of Metabolic Deficiencies to Bacteriophage Host Range and Resistance." BYU ScholarsArchive, 2021. https://scholarsarchive.byu.edu/etd/8957.

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The evolution and adaptation of microorganisms is so rapid it can be seen in the time frame of days. The root cause for their evolution comes from selective environmental pressures that see organisms with beneficial mutations survive otherwise deadly encounters or outperform members of its population who fail to adapt. This does not always result in strict improvement of the individual as in the case of antibiotic resistant bacteria who often display fitness tradeoffs to avoid death (see Reviews [1-3]). For example, when an ampicillin resistance gene (ampC) containing plasmid that is occasiona

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De, Rosa Viviana. "L'effet anticancéreux d'un sélénium : étude de son rôle dans l'activité de réparation de l'ADN et la résistance au stress oxydant." Thesis, Grenoble, 2011. http://www.theses.fr/2011GRENV053/document.

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Le sélénium est reconnu comme un micronutriment important pour l'homme et les animaux. Plusieurs études ont montré qu'une supplementation en sélénium dans le régime alimentaire pourrait être bénéfique contre les cancers du foie, du colon, du pancréas et de la prostate. Le mécanisme anti-carcinogène du sélénium se produit au niveau systémique, cellulaire et nucléaire. Ces processus peuvent également impliquer le système immunitaire et ne doivent pas être interprétés par un seul mécanisme. Jusqu'à présent son mécanisme d'action est encore inconnu. L'objectif de cette étude était d'étudier l'effe

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Wongdontree, Paprapach. "Staphylococcus aureus Adaptation to FASII-Targeted Antibiotics in Host Environments and Strategies to Potentiate Antibiotic Activities." Electronic Thesis or Diss., université Paris-Saclay, 2023. http://www.theses.fr/2023UPASB088.

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Staphylococcus aureus est un pathogène opportuniste responsable d’infections difficiles à traiter dues à l’inefficacité des antibiotiques actuels. En 2019, cette bactérie a causé le taux de mortalité mondial le plus élevé. La nécessité de recherche de nouveaux antibiotiques a permis de développer de nouvelles molécules inhibant la synthèse des acides gras de type II (FASII). Cependant, ces molécules anti-FASII présentent une faiblesse : S. aureus et les pathogènes Firmicutes sont capables de contourner l’inhibition de FASII par incorporation d’acides gras environnementaux présents dans l’hôte

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Barreiro, Portela Esther. "Study of reactive oxygen species (ROS) and nitric oxide (NO) as molecular mediators of the sepsis-induced diaphragmatic contractile dysfunction : protective effect of heme oxygenases." Doctoral thesis, Universitat Pompeu Fabra, 2002. http://hdl.handle.net/10803/7066.

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Protein nitration is considered as a marker of reactive nitrogen species formation. Heme oxygenases (HOs) are important for the defence against oxidative stress. We evaluated the involvement of the neuronal (nNOS), the endothelial (eNOS), and the inducible (iNOS) in nitrotyrosine formation and localitzation, and both the expression and funcional significance (HO inhibition and contractility studies) of HOs in sepsis-induced muscle contractile dysfunction. Sepsis was elicited by injecting rats and transgenic mice deficient in either nNOS, eNOS, or iNOS isoforms with E.Coli lipolysaccharide (LPS

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Doche, Cécile. "Elaboration et caractérisation de composites céramiques réfractaires SiAlON-nitrure de bore." Grenoble INPG, 1996. http://www.theses.fr/1996INPG4204.

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Les si alon-bn sont des materiaux susceptibles de remplacer des refractaires carbones utilises en siderurgie en particulier pour l'elaboration d'acier a faible teneur en c. Deux familles de composites, obtenues par des voies d'elaboration differentes, ont ete etudiees: si#3n#4-bn par compression a chaud et si alon-bn par frittage naturel. Dans le premier cas, un precurseur organique du bn, qui semble activer le frittage, a aussi ete utilise. Pour tous ces materiaux, nous avons etudie les procedes de fabrication, les microstructures, les proprietes mecaniques, les resistances aux chocs thermiqu

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Березка, Тетяна Олександрівна. "Удосконалення технології високостійкого пива з використанням антиоксидантів з рослинної сировини". Thesis, Національний університет харчових технологій, 2014. http://repository.kpi.kharkov.ua/handle/KhPI-Press/25005.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.18.05 – технологія цукристих речовин та продуктів бродіння. – Національний університет харчових технологій Міністерства освіти і науки, Київ, 2014. Дисертаційну роботу присвячено удосконаленню технології пива з використанням антиоксидантів з рослинної сировини. Розглянуто окиснення ізо-альфа-кислот при кип’ятінні сусла з хмелем або хмелепродуктами за ланцюговим вільнорадикальним механізмом. Визначено шляхи сповільнення окиснення в результаті додавання антиоксидантів з рослинної сировини. На основі вивчення кі

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Dessources, Samuel. "Conception de matériaux de type PtxM1-x/C (M=Ni, Nb) et PtxNi1-x/CeO2/C pour l'électroréduction de l'eau (HER) et l'électrooxydation du dihydrogène (HOR)." Thesis, Poitiers, 2015. http://www.theses.fr/2015POIT2317/document.

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Le platine constitue le matériau de référence pour l’électroréduction de l’eau (HER) et l’électrooxydation du dihydrogène (HOR). Les propriétés physicochimiques de ce matériau d’électrode synthétisé sous forme Pt/C par la méthode BAE et les paramètres cinétiques des réactions électrochimiques HOR et HER à sa surface en milieu alcalin ont été déterminés. Le palladium et l’or ont aussi des activités intéressantes vis-à-vis de ces réactions. L’activité de ces métaux nobles supportés sur carbone et obtenus par la même méthode de synthèse a été étudiée dans les mêmes conditions pour établir une étu

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Messias, Ueliton. "Atividade da superoxido dismutase, catalase, peroxidases e acumulo de H2O2 associados a infecção de um Carlavirus em soja e um Potyvirus no feijoeiro." [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/315675.

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Orientador:Jorge Vega<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Biologia<br>Made available in DSpace on 2018-08-12T04:10:59Z (GMT). No. of bitstreams: 1 Messias_Ueliton_D.pdf: 899792 bytes, checksum: c79dd05dd46e901a7add3fa66d7afc3f (MD5) Previous issue date: 2008<br>Resumo: As plantas defendem-se continuamente contra ataques de bactérias, vírus, fungos, invertebrados e de outras plantas. O estresse oxidativo é um tipo de resposta fisiológica da planta após o reconhecimento do patógeno, podendo resultar em sintomas nas plantas dependendo da sensibilidade do hosped

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Freytez, Carlos Luis Vásquez. "Bioecologia do ácaro vermelho das palmeiras, Raoiella indica Hirst (Acari: Tenuipalpidae), na Venezuela." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/11/11146/tde-14092012-171151/.

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A ocorrência do ácaro vermelho das palmeiras (AVP), Raoiella indica Hirst (Acari: Tenuipalpidae), foi relatada no Novo Mundo em 2004 e desde então este ácaro tem colonizado várias espécies de aceráceas e musáceas, assim como plantas ornamentais de outras famílias nas ilhas do Caribe, Florida (USA), Venezuela, Brasil e Colômbia. Desde aquele primeiro relato, essa espécie tem produzido consideráveis perdas econômicas em coqueiro nos países onde foi encontrada, o que tem conduzido a um interesse cada vez maior em se conhecer o impacto da praga às plantas em que este ácaro tem sido encontrado. Com

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Chêne, Charlotte. "Optimisation de l'efficacité et de la tolérance du trioxyde d'arsenic (ATO) dans les maladies fibro-inflammatoires." Electronic Thesis or Diss., Université Paris Cité, 2022. http://www.theses.fr/2022UNIP5081.

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La maladie du greffon contre l'hôte (Graft-versus-Host Disease: GvHD) et la sclérodermie systémique (Ssc) sont deux pathologies pro-inflammatoires pouvant toucher différents organes tels que la peau, les poumons, l'appareil digestif. La gravité des atteintes et le manque de traitement efficace conduisent à l'engagement du pronostic vital des patients. Il a été démontré dans plusieurs études qu'un dérèglement du système immunitaire est responsable de la réponse inflammatoire exacerbée et chronique qui induit la fibrose. Le trioxyde d'arsenic (ATO) est un agent anti-cancéreux utilisé dans le tra

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Pal, Terek. "Unapređenje kvaliteta alata za livenje pod pritiskom primenom tehnologija inženjerstva površina." Phd thesis, Univerzitet u Novom Sadu, Fakultet tehničkih nauka u Novom Sadu, 2016. http://www.cris.uns.ac.rs/record.jsf?recordId=101472&source=NDLTD&language=en.

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Proučavane su koroziona postojanost i tendencija lepljenja različitihmaterijala u kontaktu sa tečnom Al–Si–Cu legurom. Ispitivanjem suobuhvaćeni čelik za rad na toplo, plazma nitrirani čelik i dupleksslojevi sa CrN, TiAlN, TiAlSiN i CrAlN prevlakama, različitog nivoapovršinske hrapavosti. Za ispitivanja pomenutih fenomenaprimenjena je metoda izvlačenja, koja je unapređena kako bi se povećalenjena tačnost i verodostojnost simulacije procesa livenja. Korozioniefekti su pojačani tako što su uzorci osim kratkog kontakta sa odlivkomzadržavani i u dužim periodima u kontaktu sa tečnom leg

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Yang, Yu-Hsi, and 楊玉璽. "Isolation and metabolism ofelemental sulfur oxidation microbes in acidic hot spring." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/73653994310278054524.

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碩士<br>臺灣大學<br>動物學研究所<br>98<br>Abstract A thermoacidophilic sulfur-oxidizing Archaea, strain SYK-ESO-1, was isolated from a hot spring in Shauyuken （71.6℃, pH 2.36）, Yangminshan. On the basis of 16S rDNA analysis, strain SYK-ESO-1 is affiliated with Acidianus manzaensis strain NA-1 and Acidianus manzaensis strain TA at a similarity of 99 %. The range of growth temperature, pH and NaCl concentration are 50-85℃ (optimum at 82℃), 0.0-5.0 (optimum at pH= 2.0), 0-10 ‰ (optimum at 1.67 ‰), respectively. The cells are irregular cocci. Strain SYK-ESO-1 is aerobic and can grow autotrophically using S0 a

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