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Dissertations / Theses on the topic 'Cobaltic ions'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Sylvester, Paul. "Extraction of cobalt and other metal ions from aqueous solutions using inorganic ion exchangers." Thesis, University of Reading, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.278137.

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2

Heshmati, Parissa. "Novel annulation reactions using cobalt stabilised carbonium ions." Thesis, Kingston University, 1994. http://eprints.kingston.ac.uk/20573/.

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This programme of work was aimed at the synthesis of a range of linear hydrocarbon molecules bearing functionality at each end. It was envisaged that by the application of an intramolecular Nicholas reaction the linear chain would cyclise to afford an [alpha],[beta] disubstituted cycloalkanone. The Nicholas reaction is based on the propargyl carbonium ions, stabilised with binuclear cobalt species, which are subject to nucleophilic attack at the propargyl position. This reaction has previously been exploited in syntheses in an intermolecular fashion, however, few approaches involving an intram

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3

Xu, Jing. "The effects of cobalt and chromium ions and nanoparticles on macrophage and fibroblast behaviour." Thesis, Queen Mary, University of London, 2018. http://qmro.qmul.ac.uk/xmlui/handle/123456789/42807.

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Adverse tissue reactions to hip prostheses containing CoCr alloys have been widely reported, particularly for implants utilising a metal-on-metal bearing surface or, more recently, a modular taper junction and have been termed Adverse Response to Metal Debris (ARMD). Histological assessments of synovial tissues from patients at revision operation often demonstrate an extensive accumulation of macrophages and abundant tissue necrosis or fibrosis. The inflammatory response starts with the recruitment of immune cells and requires the egress of macrophages from the inflamed site for resolution of

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4

Gao, Shuang. "INVESTIGATION OF TRANSITION-METAL IONS IN THE NICKEL-RICH LAYERED POSITIVE ELECTRODE MATERIALS FOR LITHIUM-ION BATTERIES." UKnowledge, 2019. https://uknowledge.uky.edu/cme_etds/100.

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Layered lithium transition-metal oxides (LMOs) are used as the positive electrode material in rechargeable lithium-ion batteries. Because transition metals undergo redox reactions when lithium ions intercalate in and disintercalate from the lattice, the selection and composition of transition metals largely influence the electrochemical performance of LMOs. Recently, a Ni-rich compound, LiNi0.8Co0.1Mn0.1O2 (NCM811), has drawn much attention. It is expected to replace its state-of-the-art cousins, LiCoO2 (LCO) and LiNi1/3Co1/3Mn1/3O2 (NCM111), because of its higher capacity, lower cost, and red

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5

Fleury, Cyrille. "Effect of cobalt and chromium ions on osteoblasts in vitro." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=83863.

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Despite the tremendous success of total hip arthroplasty (THA) in terms of cost and clinical results, this procedure has been restrained by long term outcomes. One of the major clinical concerns is the generation of UHMWPE particles leading to periprosthetic osteolysis. Because of their low volumetric wear rate, metal-on-metal bearings have emerged as an alternative. However, metal particles and ions released from metal hip prostheses due to wear and corrosion have been essential concerns for the orthopaedic community. In fact, several clinical studies have demonstrated elevated concent

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6

Daou, Samira. "Impact des ions cobalt sur le pouvoir bactéricide des neutrophiles humains." Versailles-St Quentin en Yvelines, 2011. http://www.theses.fr/2011VERS0026.

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L’infection sur prothèse totale de hanche métal-métal est une complication redoutable. En dépit de nombreux avantages, le couple de frottement MM présente l’inconvénient de produire des ions cobalt (Co2+) dans les tissus péri prothétiques, riches en PNN. La concentration de Co2+ dans ces tissus est inconnue. En revanche, la concentration sanguine chez ces patients est de l’ordre de 20nM. Les effets biologiques du Co2+ restent encore controversés. Dans ce travail, nous avons tout d’abord mesuré les concentrations péri prothétiques de Co2+ chez des patients porteurs d’une PTH MM puis nous avons

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7

Boeer, Angelika. "Anisotropy in Molecular Magnetism- Magnetic Exchange Coupling of Octahedral Cobalt (II) Ions." Thesis, University of Manchester, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.503050.

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8

Gédéon, Antoine. "Contribution a l'etude par rmn (**(1)h et **(129)xe) des zeolithes my (m = na**(+), ni**(2+), cu**(2+) et co**(2+)) : adsorption d'eau et d'ammoniac." Paris 6, 1987. http://www.theses.fr/1987PA066390.

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L'application de la rmn **(129)xe permet de suivre l'evolution du libre parcours moyen du xenon adsorbe utilise comme sonde en fonction de la concentration en eau d'une zeolite nay. De plus, l'adsorption de l'ammoniac sur la zeolite y modifiee par echange de cations metalliques, a montre que la rmn-**(1)h permet de suivre la reconstitution des complexes ammoniaques en fonction de la temperature de pretraitement du solide et de la concentration en nh::(3) adsorbe ou desorbe

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9

Claridge, Stephen. "Applications of cobalt stabilised carbonium ions to the synthesis of fused ring carbocycles." Thesis, Kingston University, 1996. http://eprints.kingston.ac.uk/20593/.

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This programme of work has been aimed at developing novel annulation reactions in order to furnish a variety of carbocyclic and heterocyclic ring systems: In all of the examples investigated the key cyclisation step was achieved using a Nicholas reaction, that is, the reaction of a dicobalt hexacarbonyl stabilised propargylic carbonium ion with an intramolecular nucleophile. After an initial review of both cyclisation reactions and the chemistry of organocobalt clusters, the results of these investigations are detailed. In the initial investigations a range of 1,2-disubstituted cycloalkanes we

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10

Muthakia, Gerald K. "Electron transfer reactions in solution involving cobalt(III), chromium(VI) and manganate(VII) ions." Thesis, University of Exeter, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.304800.

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11

Keech, Angus Miles. "Role of cobalt(II) and manganese(II) as optical and magnetic probes of metal binding sites in proteins." Thesis, University of East Anglia, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389267.

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12

Tottey, Stephen. "Copper transport and metal specificity in Synechocystis PCC 6803." Thesis, University of Newcastle Upon Tyne, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.391269.

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13

Tong, Tedman. "Corrosion Dynamics of Cobalt-Chromium Alloy F-75 Powder." DigitalCommons@CalPoly, 2010. https://digitalcommons.calpoly.edu/theses/368.

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The increasing usage of metal-on-metal joint replacements consisting of a cobalt-chromium-molybdenum alloy requires increasing concern regarding the inevitable generation of metallic wear debris. Patients with these joint replacements exhibit elevated concentrations of cobalt and chromium ions within their serum, blood and urine. The presence of these metal ions suggests the potential for bodily damage and indicates corrosive processes are acting upon wear debris. To understand the behavior of these corrosive processes, powders of cobalt-chromium-molybdenum alloy F-75 were studied. Four pow

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14

Pedacchia, Marta. "Rilassometria NMR per lo studio degli ioni cobalto nel cobaltismo da artroprotesi." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/8330/.

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Il rilascio di detriti d’usura metallici è una grave problematicità connessa ai sistemi protesici, e principalmente riguarda le protesi d’anca ad accoppiamento metallo su metallo in lega CoCr. La presenza di un livello di ioni Co nel siero che supera la soglia di tossicità è correlata a metallosi periprotesica eal fallimento del l’impianto. Recentemente è emersa un’altra casistica, presumibilmente connessa alla distribuzione e accumulo di questi ioni in tessuti di organi anche lontani dall’impianto, che si manifesta con una sintomatologia sistemica analoga a casi noti di avvelenamento da Cobal

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15

Esfandiari, Hossein. "Ion beam mixing of nickel and cobalt films on silicon." Thesis, University of Salford, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.304593.

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16

Talib, Ibrahim Abu. "Aqueous oxidation of Inconel alloy and its interaction with cobalt ion." Thesis, University of Surrey, 1985. http://epubs.surrey.ac.uk/844400/.

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The transport of radioactivity in the primary circuits of water-cooled reactors is an important problem in the nuclear power industry. It is generally believed that active species (particularly Co-60 and Co-58) are transported via particulates or in solution and may be incorporated into the oxide films on Inconel, which accounts for 15% of the total surface area exposed to the primary coolant in modern PWRs. This thesis describes investigation of the oxidation of the Inconel alloy in aqueous media at 473 K and 573 K, and its interaction with cobalt ion. The X-ray photoelectron spectroscopy in

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17

Adams, Robert Jonathan Watt. "The extraction of caesium and cobalt(II) from solution using inorganic ion exchangers in electrochemical ion exchange." Thesis, University of Reading, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.385171.

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18

D'Orléans, Céline. "Elaboration par implantation ionique de nanoparticules de cobalt dans la silice et modifications de leurs propriétés sous irradiation d'électrons et d'ions de haute énergie." Université Louis Pasteur (Strasbourg) (1971-2008), 2003. http://www.theses.fr/2003STR13101.

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L'objectif de ce travail est d'explorer les possibilités offertes par les faisceaux énergétiques pour élaborer des nanoparticules magnétiques dans la silice et d'en modifier les propriétés. Des ions Co+ ont été implantés à 160 keV à 2. 1016,5. 1016 et 1017 at. Cm-2,à des températures de 77, 295 et 873K. Nous avons montré la dépendance de la taille des particules de la fluence,et de façon plus prononcée,de la température d'implantation. La MET révèle la présence de particules d'un diamètre de l'ordre de 1 nm qui augmente jusqu'à 9,7 nm pour les implantations à 2. 1016 Co+. Cm-2 à 77K,et à 1017

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19

Breteau, Jean-Marc. "Etude de materiaux dopes ni**(2+) et co**(2+) pour laser accordable a fonctionnement continu dans le proche infrarouge." Paris 6, 1986. http://www.theses.fr/1986PA066357.

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Les composes mgf::(2): ni, mgf::(2): co, kznf::(3): ni, kznf::(3): co et mga1::(2)o::(4): ni font l'objet d'une etude spectroscopique pour determiner leurs caracteristiques en tant que materiaux pour laser accordable a fonctionnement continu dans le proche i. R. (1 mu m a 2 mu m). Nous montrons le role de la concentration en ions actifs sur l'intensite et la duree de vie de fluorescence i. R. Ainsi que l'importance des transferts d'energie et de la reabsorption dans l'etat excite. Pour l'ensemble des materiaux, les transitions radiatives et non radiatives font l'objet d'une etude approfondie q

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20

Kladova, Anna Vadymivna. "Metals in proteins from sulphate-reducing bacteria: adenylate kinase and ATP sulfurylase. Proteins containing cobalt, zinc, iron (II) ions." Doctoral thesis, Faculdade de Ciências e Tecnologia, 2009. http://hdl.handle.net/10362/6342.

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A Thesis submitted at the Faculty Science and Technology of the New University of Lisbon for a degree in Doctor of Philosophy in Biochemistry with specialization in Physical Biochemistry<br>(fellowship BD SFRH/BD/24744/05)- Foundation for Science and Technology

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21

Harry, Milton Anthony. "Structural and electrical properties of ion beam synthesised ternary iron-cobalt silicide." Thesis, University of Surrey, 1996. http://epubs.surrey.ac.uk/842748/.

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The fundamental properties of the binary disilicides CoSi2 and FeSi2 have been extensively studied. Epitaxial CoSi2 can be formed on silicon, however, it is very difficult to form epitaxial FeSi2 on silicon substrates. With the aim to improve the epitaxial quality of FeSi2 and also to study the effect of the incorporation of Fe(Co) into CoSi2(FeSi2), ternary Fe-Co silicides are explored. This thesis reports a study of the structural and electrical characterisation of surface and buried ternary Fe-Co silicide layers in Si(100) fabricated by ion beam synthesis (IBS). In all cases two sets of sam

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22

Edwards, S. C. "Ion induced cobalt silicide formation in the presence of an interfacial barrier." Thesis, Lancaster University, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.373808.

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23

Balasubramanian, Prasanth [Verfasser]. "Cobalt free nanomaterials as positive electrodes for Lithium ion battery / Prasanth Balasubramanian." Ulm : Universität Ulm, 2019. http://d-nb.info/1180496973/34.

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24

Takeuti, Douglas de Freitas. "Thermal radiative properties of ion-implanted silicon and titanium and cobalt silicides." Thesis, University of Cambridge, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.627343.

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25

Diantouba, Bertin Aimé. "Effets structuraux des acyl-4-pyrazolones-5 dans l'extraction liquide-liquide des cations metalliques divalents." Université Louis Pasteur (Strasbourg) (1971-2008), 1988. http://www.theses.fr/1988STR13093.

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Etude de l'effet de l'acidite de la lipophilie et effets structuraux des acyl-4 pyrazolones-5 dans l'extraction de cu, co, zu et pb divalents. Extraction de 3 types de complexes metalliques : mononucleaires de type m(l-n-lh)::(2) ou m(l-n-l) et polynucleaires (m(l-n-l))::(j). Meilleures possibilites des bis-acyl-4 pyrazolones-5

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26

Zheng, Panni. "The Design and Optimization of a Lithium-ion Battery Direct Recycling Process." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/93212.

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Nowadays, Lithium-ion batteries (LIBs) have dominated the power source market in a variety of applications. Lithium cobalt oxide (LiCoO2) is one of the most common cathode materials for LIBs in consumer electronics. The recycling of LIBs is important because cobalt is an expensive element that is dependent on foreign sources for production. Lithium-ion batteries need to be recycled and disposed properly when they reach the end of life (EOL) to avoid negative environmental impact. This project focuses on recycling cathode material (LiCoO2) by direct method. Two automation stages, tape peeling

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27

Mourão, Cecília Alves 1989. "Purificação de fragmentos Fab humano em níquel, cobre, cobalto e zinco quelatados ao CM-Asp." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266104.

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Orientador: Sonia Maria Alves Bueno<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-25T09:14:39Z (GMT). No. of bitstreams: 1 Mourao_CeciliaAlves_M.pdf: 2559584 bytes, checksum: efe6b17b9b7e5ceb16ade74a6ae30629 (MD5) Previous issue date: 2014<br>Resumo: As imunoglobulinas G (IgG) e seus fragmentos Fab, F(ab)¿2 e Fv apresentam aplicações proeminentes nas áreas terapêuticas e de diagnósticos. Em determinadas situações em que a região Fc é dispensável e/ou deletéria, emprega-se preferencialmente fragmentos em r

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28

Navick, Caldentey Martine. "Contribution à l'étude des phénomènes de synergie en extraction liquide-liquide : application à l'extraction du nickel(II) et du cobalt(II) en milieu acide." Paris 6, 1986. http://www.theses.fr/1986PA066297.

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Etude des propriétés d'agent d'extraction des acides di(alkyl)dithiophosphoriques ; ils ne peuvent pas être utilisés industriellement car ils s'hydrolysent rapidement au contact d'une phase aqueuse des 35**(o). En fait il semble que les anions di(alkyl) monothiophosphoriques conviennent, utilises en même temps qu'une oxime. Effet de divers facteurs sur la cinétique d'extraction. On peut séparer à ph1, ni et co par une extraction par acide di(ethyl)monothiophosphorique et quinoleinols-8 substitués.

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29

Akbar, Moeed. "Investigation into the immunological effects of chromium and cobalt ions and wear debris released from metal-on-metal hip implants." Thesis, University of Strathclyde, 2011. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=16801.

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30

d'Aloya, de Pinilla Anna. "Heterogeneous electrochemical reactions taking place on metallic iron in ammoniacal-carbonate solutions containing dissolved nickel, cobalt, copper and thiosulfate ions." Thesis, d'Aloya de Pinilla, Anna (2015) Heterogeneous electrochemical reactions taking place on metallic iron in ammoniacal-carbonate solutions containing dissolved nickel, cobalt, copper and thiosulfate ions. PhD thesis, Murdoch University, 2015. https://researchrepository.murdoch.edu.au/id/eprint/29416/.

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In the Caron process, nickeliferous laterite ores undergo a pyrometallurgical pre-treatment step, in which their nickel and cobalt content is reduced to the metallic state. This is followed by leaching in ammoniacal-carbonate solutions, where metallic nickel and cobalt dissolve by forming complexes with ammonia. Since the reductive pre-treatment step also results in some metallic iron being formed, nickel and cobalt are present in the pre-reduced ore mainly as ferro-alloys. As a result, the dissolution behaviour of metallic nickel and cobalt is strongly influenced by the behaviour of metallic

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31

Yu, Jie. "Oxidation of ultra high molecular weight polyethylene, UHMWPE, containing traces of cobalt ion." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0018/MQ53349.pdf.

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32

Liu, Xiao Jie. "Synthesis of magnetic nanoparticles and carbon based nanohybrid materials for biomedical and energy application." Thesis, Strasbourg, 2014. http://www.theses.fr/2014STRAF055/document.

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Les travaux de cette thèse ont été consacrés à la synthèse de nanoparticules magnétiques d'oxyde de fer et d'oxyde de cobalt et de nanoparticules coeur-coquille constituées d'un coeur d'oxyde de fer recouvert d'oxyde de cobalt et à l'élaboration de nanomatériaux - composites nanostructures carbonées/nanoparticules d'oxyde métallique - pour des applications dans le domaine biomédical et celui de l'énergie. Pour la synthèse des NPs, la forme et la taille des NPs sont fortement dépendantes des conditions de réaction (nature des ligands, des solvants, température de réaction ... ) , ce qui affecte

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33

Hamdani, Fayçal. "Etude magnétooptique des semiconducteurs semimagnétiques à base de cobalt II1-xCoxVI : Cd1-xCoxSe, Cd1-xCoxS et Zn1-xCoxSe." Montpellier 2, 1992. http://www.theses.fr/1992MON20101.

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J'ai developpe au cours de ce travail un ensemble d'etudes concernant les proprietes magnetooptiques de nouveaux materiaux semimagnetiques a base de cobalt. Une grande partie de ce travail concerne l'etude des composes possedant une structure cristalline de type hexagonal: cdcose et cdcose. L'etude de magnetoreflectance et d'aimantation, nous a permis de determiner les parametres d'echange ion-porteur et les parametres de la structure de bande. Les variations des energies de transitions excitoniques en fonction du champ magnetique sont parfaitement decrites par les energies propres de l'hamilt

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34

Ge, Dayang. "Direct Lithium-ion Battery Recycling to Yield Battery Grade Cathode Materials." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/92800.

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The demand for Lithium-ion batteries (LIBs) has been growing exponentially in recent years due to the proliferation of electric vehicles (EV). A large amount of lithium-ion batteries are expected to reach their end-of-life (EOL) within five to seven years. The improper disposal of EOL lithium-ion batteries generates enormous amounts of flammable and explosive hazardous waste. Therefore, cost-effectively recycling LIBs becomes urgent needs. Lithium nickel cobalt manganese oxides (NCM) are one of the most essential cathode materials for EV applications due to their long cycle life, high capacity

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Chebiam, Ramanan Venkata. "Lithium-ion battery cathodes : structural and chemical stabilities of layered cobalt and nickel oxides /." Full text (PDF) from UMI/Dissertation Abstracts International, 2001. http://wwwlib.umi.com/cr/utexas/fullcit?p3008298.

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Zamil, Raya. "Recycling Cathode of Lithium-Ion Battery by Using Deep Eutectic Solvents to Extract Cobalt." Thesis, Umeå universitet, Kemiska institutionen, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-173089.

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37

Xiao, Jie. "Layered lithium nickel manganese cobalt dioxide as a cathode material for Li-ion batteries." Diss., Online access via UMI:, 2008.

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Posada, Estefan Olga Maria. "Study of the toxicity, immunological and gene expression effects of cobalt ions and wear debris derived from metal-on-metal hip implants." Thesis, University of Strathclyde, 2013. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=23100.

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Joint replacements have been used for over 30 years with considerable success as treatment for bone diseases. As a surgical alternative to metal on metal (MoM) total hip replacement, hip resurfacing was developed using Cobalt-Chromium (CoCr) alloys. However, debris particles are generated by wear at the articulating CoCr surfaces. The nanoparticles and ions produced disseminate throughout the body and interact with different cell types. In order to evaluate the effects of CoCr particles and ions released from MoM implants, U937 cells and primary human lymphocytes were exposed in vitro to artif

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Ogbeifun, Osemeikhian. "Sol-gel and solid-state fluorination of lithium cobalt oxide for Li-ion secondary batteries." Diss., University of Pretoria, 2017. http://hdl.handle.net/2263/66580.

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A series of fluorinated LiCoO2 compounds, LiCoO2−xFx with x = 0.05 − 0.65, were synthesised by both a sol-gel and a solid-state method. The sol-gel method utilises LiNO3 and Co(NO3)2.6H2O as Li and Co sources respectively, water and 1-butanol as solvent for the fluoride precursor LiF, and citric acid as the chelating agent. The prepared materials were compared using pXRD, SEM, Raman, TG and DTA analyses. pXRD revealed a secondary phase appearing at x= 0.25 in materials prepared by the sol-gel method and as early as x= 0.08 in materials prepared by the thermal solid-state method. Materials prep

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40

Djoudi, Neïla. "Conception, développement et mise au point d'un procédé hydrométallurgique de récupération du cobalt (II) issu de mines secondaires par précipitation." Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0010.

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Le cobalt fait partie des cinquante métaux stratégiques, considérés comme essentiels pour l’industrie et qui sont au cœur d’enjeux économiques et géopolitiques mondiaux. C’est pourquoi, la recherche portant sur la récupération de ce métal critique, à partir de déchets industriels ou urbains, est particulièrement importante pour les années à venir. L’objet de la thèse porte sur le développement d’un procédé hydrométallurgique permettant de récupérer le cobalt à partir d’un lixiviat de batterie Li-ion par précipitation. La première partie de ces travaux s’est portée sur le choix de l’agent préci

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Lobos, Aldo. "Bioleaching Potential of Filamentous Fungi to Mobilize Lithium and Cobalt from Spent Rechargeable Li-Ion Batteries." Scholar Commons, 2017. http://scholarcommons.usf.edu/etd/7051.

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Demand for lithium (Li) and cobalt (Co) is on the rise, due in part to their increased use in rechargeable Li-ion batteries (RLIB). Current recycling processes that utilize chemical leaching efficiently recover in Li and Co from the cathode material in spent batteries; however, these processes are costly and emit hazardous waste into the environment. Therefore, a more sustainable process for recycling Li and Co is needed, and bioleaching may provide a solution. Fungal bioleaching has been shown in previous studies to effectively mobilize metals (Pb, Al, Mn, Cu, and Zn) f

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42

Sugiura, Kenji, Hiromichi Ohta, Kenji Nomura, Masahiro Hirano, Hideo Hosono, and Kunihito Koumoto. "High electrical conductivity of layered cobalt oxide Ca_3Co_4O_9 epitaxial films grown by topotactic ion-exchange method." American Institute of Physics, 2006. http://hdl.handle.net/2237/7021.

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43

Salager, Laurent. "Conception en vue du durcissement des circuits intégrés numériques aux effets radiatifs." Montpellier 2, 1999. http://www.theses.fr/1999MON20030.

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Cette etude est consacree a la conception de circuits digitaux pour des fonctionnements en environnements radiatifs. Les effets de dose cumulee et des ions lourds sont presentes et modelises pour mettre en place de nouvelles techniques de durcissement adaptees aux technologies cmos-bulk standards. Des experimentations sont ensuite effectuees sur des circuits incluant ces nouveaux principes. Ils comportent par exemple des cellules digitales durcies aux effets de dose cumulee et des matrices de points memoires statiques durcis aux effets des ions lourds. Une modelisation des courants de fuite in

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Vasconcelos, Glenda Lara Lopes. "Efeito das pastilhas higienizadoras efervescentes à base de peróxido alcalino em liga metálica de cobalto-cromo." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/58/58131/tde-15032016-162731/.

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A higienização das próteses é de fundamental importância para a longevidade do tratamento reabilitador. Entretanto, é necessário analisar os efeitos que os higienizadores podem causar nas superfícies que compõem uma prótese. Deste modo, o objetivo deste estudo foi avaliar os efeitos de pastilhas efervescentes à base de peróxido alcalino em liga de cobalto cromo (Co-Cr), utilizada em Prótese Parcial Removível (PPR). A partir de uma matriz metálica, padrões de cera em forma de disco (12 mm x 3 mm) foram confeccionados para posterior fundição. Os espécimes metálicos (n=16) foram imersos nas soluç

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Le, Roux Barbara. "Etude des borates de métaux de transition en tant que matériaux d'électrode pour accumulateurs Lithium-ion." Caen, 2015. http://www.theses.fr/2015CAEN2025.

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Les borates LiMBO3 (M = Fe, Mn, Co) ont été synthétisés et optimisés pour être utilisés comme matériaux d’électrode positive dans les accumulateurs Li-ion. De nouvelles méthodes de synthèse, telles que la synthèse solvothermale, ont été développées afin de réduire la taille des particules pour augmenter la conductivité de ces matériaux dans le but d’améliorer leurs performances électrochimiques. Au vu des propriétés des matériaux considérés, le polymorphe basse température de LiMnBO3 a été plus largement étudié. La structure du cœur de ce matériau est conservée pendant le cyclage, cependant, l

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Vicary, Amanda Denise. "Aspects of nickel uptake and resistance in the yeast Saccharomyces cerevisiae." Thesis, Keele University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368986.

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Steibel, Jérôme. "Etude par fluorescence de complexes ternaires : adn-sels de cobalt-proflavine role catalytique de l'adn." Université Louis Pasteur (Strasbourg) (1971-2008), 1987. http://www.theses.fr/1987STR13239.

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La fluorescence de sondes intercalees dans l'adn a ete etudiee en presence de sels metalliques. Seuls les sels du cobalt donnent lieu a une inhibition de fluorescence qui s'explique par le transport d'oxygene pres de la sonde fluorescente

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Zakri, Waleed. "Fabrication and Simulation of Semi-Solid Electrodes for Flexible Lithium-Ion Batteries." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1531480028749308.

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Thoréton, Vincent. "Propriétés de transport de l'oxygène dans les cobaltites Ba2Co9O14 et Ca3Co4O9+δ  : apport du SIMS et du LEIS". Thesis, Lille 1, 2012. http://www.theses.fr/2012LIL10144/document.

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Ce travail porte principalement sur la caractérisation des propriétés de transport de l'oxygène dans deux cobaltites, Ba2Co9O14 et Ca3Co4O9+δ, matériaux prometteurs comme cathode de pile à combustible à oxyde solide ou anode d’électrolyseur haute-température. Une grosse partie du travail a concerné la mise en place de la mesure de profils de diffusion de l'oxygène par échange isotopique et analyse SIMS. L'étude a ainsi démontré que ces deux matériaux sont des conducteurs mixtes ionique/électronique.Alors que les paramètres de transport mesurés sur Ba2Co9O14sont relativement faibles, les phases

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Brinkhaus, Linda [Verfasser], and Dirk [Akademischer Betreuer] Guldi. "Degradation Phenomena of Lithium-rich Lithium-Nickel-Cobalt- Manganese-Oxide in Lithium-Ion-Batteries / Linda Brinkhaus. Gutachter: Dirk Guldi." Erlangen : Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 2015. http://d-nb.info/1075837618/34.

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