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Dissertations / Theses on the topic 'Metal ions. Cations'

Author: Grafiati

Published: 4 June 2021

Last updated: 4 February 2022

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1

Palla, Veladri. "Heterometallic Interactions of d8-d10 Metal Ions in the Presence of +2 Cations." Fogler Library, University of Maine, 2007. http://www.library.umaine.edu/theses/pdf/PallaV2007.pdf.

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2

Liu, Haichuan. "Reactions in gaseous metal-organic complexes induced by the photoexcitation of the metal chromaphores /." View abstract or full-text, 2004. http://library.ust.hk/cgi/db/thesis.pl?CHEM%202004%20LIU.

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3

Mason, Andrew James. "The synthesis and development of new chromogenic reagents for cations." Thesis, University of Liverpool, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240310.

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4

Matlack, Keith Scanlan. "Modeling the interaction of dissolved organic matter with cations." Diss., Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/26215.

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5

Brady, Dean. "Bioaccumulation of metal cations by yeast and yeast cell components." Thesis, Rhodes University, 1993. http://hdl.handle.net/10962/d1004107.

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The aim of the project was to determine whether a by-product of industrial fermentations, Saccharomyces cerevisiae, could be utilized to bioaccumulate heavy metal cations and to partially define the mechanism of accumulation. S. cerevisiae cells were found to be capable of accumulating Cu²⁺in a manner that was proportional to the external Cu²⁺ concentration and inversely proportional to the concentration of biomass. The accumulation process was only minimally affected by temperature variations between 5 and 40°C or high ambient concentrations of sodium chloride. The accumulation process was ho

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6

Ruffolo, Raffaele. "Silanes and allylsilanes as possible precursors for transition metal-stabilized silylium ions /." *McMaster only, 1997.

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7

Weeks, Jennifer Megan. "A structural thermodynamic and equilibrium study of chiral pendant arm triaza macrocyclic ligand complexes: towards the formation of metal-ion activated molecular receptors : a thesis submitted for the degree of Doctor of Philosophy at the University of Adelaide (Faculty of Science) /." Title page, table of contents and abstract only, 2000. http://web4.library.adelaide.edu.au/theses/09PH/09phw395.pdf.

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8

Stephens, Ashley. "Cryptates and pendant arm ligand complexes /." Title page, contents and abstract only, 1994. http://web4.library.adelaide.edu.au/theses/09PH/09phs832.pdf.

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9

Müller, Wolfram. "Extraction liquide-solide de cations métalliques par des cations amphiphiles." Thesis, Montpellier 2, 2010. http://www.theses.fr/2010MON20173/document.

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Dans le domaine de la séparation sélective pour le traitement et la valorisation des combustibles nucléaires usés, l'extraction liquide-liquide est largement utilisée au niveau industriel. Cependant dans le cadre des technologies nucléaires du futur, des procédés alternatifs de séparation sont recherchés. Notamment la précipitation sélective d'actinides par des tensioactifs cationiques en milieu aqueux (l'extraction liquide-solide étudié par Heckmann et al dans les années 80) apparaît comme une approche intéressante. Le principal avantage de cette technique, comparée à l'extraction liquide-liq

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10

Clarke, Philip. "A study of cryptate complexes and pendant arm ligand complexes /." Title page, contents and abstract only, 1992. http://web4.library.adelaide.edu.au/theses/09PH/09phc5988.pdf.

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11

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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12

Zhao, Ming. "Removal and recovery of heavy metals from synthetic solutions and electroplating effluents using yeast and the water fern Azolla filiculoides." Thesis, Rhodes University, 1998. http://hdl.handle.net/10962/d1004061.

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The aims of the project were twofold. The initial objective of the study, based on previous results, was to develop an economically viable methodology for immobilizing yeast cells for the treatment of heavy metal-laden waste water. The non-viable yeast cross-linked by 13% (w/v) formaldehyde/1N HNO₃ exhibited satisfactory mechanical strength and rigidity in a continuous-flow column operation. No apparent disruption of the biomass after repeated use was observed. The cost of immobilizing 1kg dry yeast pellets was estimated at less than US$I. Zn uptake capacity of FA-cross-linked pellets, on batc

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13

Giard, Aude. "Étude quantique de sites métalliques dans des peptides et protéines modèles." Thesis, Montpellier, Ecole nationale supérieure de chimie, 2014. http://www.theses.fr/2014ENCM0008/document.

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La nicotianamine est une molécule naturelle qui joue un rôle essentiel dans la régulation des concentrations en métaux de transition dans les plantes. Sa structure comprend trois acides carboxyliques et trois fonctions amines. L'objectif du travail présenté dans ce manuscrit est d'établir un protocole permettant de reproduire les propriétés de chélation de cette molécule grâce à des calculs de chimie quantique. L'intérêt est d'appliquer ce protocole à des analogues synthétiques de la nicotianamine, afin de prédire leurs propriétés.Le protocole que nous avons mis au point s'articule autour de q

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14

Schaumann-Gaudinet, Annick. "Perturbation par les ions lithium de caractéristiques ioniques des suspensions cellulaires d'Acer pseudoplatanus L." Rouen, 1988. http://www.theses.fr/1988ROUES018.

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15

Kowenje, Chrispin B. O. "Spectroscopic characterization of the metal cation siting and the adsorbate-cation interactions in Cu (II) and Co (II) exchanged faujasite-X zeolite." Diss., Online access via UMI:, 2006.

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16

Tambosi, Reem. "Stress and toxicity of metal in photosynthetic bacteria : multi-scale study of the effects and the targets of metal ions and nanoparticles Silver and Copper Acute Effects on Membrane Proteins and Impact on Photosynthetic and Respiratory Complexes in Bacteria Silver Effect on Bacterial Cell Membrane Structure Investigated by Atomic Force and Scanning Electron Microscopes Cadmium and Copper Cross-tolerance. Cu+ alleviates Cd2+ toxicity, and both cations target heme and chlorophyll biosynthesis pathway in Rubrivivax gelatinosus Additive effects of metal excess and superoxide, a highly toxic mixture in bacteria." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASL070.

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L’usage intensif des métaux et des ions métalliques dans l'industrie et l'agriculture représente une menace sérieuse pour l'environnement et pour tous les êtres vivants en raison de la toxicité aiguë de ces ions. Cependant, cela peut aussi être un outil prometteur. En effet, les ions comme les nanoparticules d'argent sont très utilisés dans diverses applications médicales, industrielles et sanitaires. L'effet antimicrobien de ces nanoparticules est en partie lié aux ions Ag⁺ libérés et à leur capacité à interagir avec les membranes bactériennes. L'objectif de ce projet est d'étudier l'interact

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17

Ye, Songtao. "Ion-Pair Behavior Between Polyoxometalates Anion and Alkali Metal Cation." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1522253761785623.

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18

Zapata-Ormachea, Mariel L. "Thermodynamic aspects of macrocycles and their metal-ion complexes in solution and in the solid state." Thesis, University of Surrey, 2000. http://epubs.surrey.ac.uk/843197/.

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This thesis concerns the thermodynamics of macrocycles and their metal cation complexes in non-aqueous media and these are discussed under two main headings, i) Thermodynamics of Alkali-Metal Cations and Macrocycles in Solution and in the Solid State. Thermodynamic parameters of complexation for alkali-metal cations and macrocycles (18-crown-6 and ethyl p-tert-butylcalix(6)arene hexanoate) in benzo-nitrile at 298.15 K are first reported. These data are compared with those previously reported for cryptand 222 and these cations in this solvent. A 'peak' selectivity for potassium is observed for

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19

Momoh, Paul O. "Structures and Reactivities of Ionized and Metal Cation-Containing Acetylene Clusters." Available to VCU users online at:, 2007. http://hdl.handle.net/10156/1659.

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20

Alshamrani, Nouf. "Cation-π Interactions of Selected Alkali Metal Ions with Two Benzene Rings Connected through Linear Chains". DigitalCommons@Robert W. Woodruff Library, Atlanta University Center, 2018. http://digitalcommons.auctr.edu/cauetds/147.

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Quantum chemical calculations at M06-2X/6-311+G(2d,2p) level were employed to examine the structures, dissociation energies and vibrational spectra of complexes formed by Li+, Na+ and K+ with diphenylmethane, 1,2-diphenylethane, 1,3-diphenylpropane, [2.2]paracyclophane and [3.3]paracyclophane molecules. The effect of heteroatom substitution in the connecting chains of 1,3-diphenylpropane and [3.3]paracyclophane molecules on the binding affinity of cations with ligands was also included in this study. The complexes of [3.3] paracyclophane based molecules seem to have weak cation-pi interactions

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21

Salazar, Lupe E. Pulcha. "Lower rim calix[4]arene derivatives and their complexes with univalent cations : solution, complexation and X-ray diffraction studies." Thesis, University of Surrey, 2001. http://epubs.surrey.ac.uk/843331/.

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Following an introoduction on calixarene chemistry and their metal-ion complexes including some of their applications, the aims of the work are described. Thus, the first part of this thesis concerns the detemination of the standard enthalpies of solution, sH°, of new lithium and sodiimi 1:1 electrolytes based on eth p=tert-butycalix[4]arene tetraethanoate containing various anions in acetonitrile at 298.15 K. Using these data in conjunction with previously reported sH° values for the free metal-ion salts and the ligand and standard enthalpies of complexation, cH°H° of allcali-

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22

Alsharaeh, Edreese Housni. "Gas Phase Studies of Molecular Clusters Containing Metal Cations, and the Ion Mobility of Styrene Oligomers." VCU Scholars Compass, 2004. http://scholarscompass.vcu.edu/etd/1200.

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This study is divided into three parts. Part I deals with the mechanism of the self-initiated polymerization (or thermal polymerization) of styrene in the gas phase. In this work, we present the first direct evidence for the thermally self-initiated polymerization of styrene in the gas phase. Our approach is based on on-line analysis of the gas phase Oligomers by mass-selected ion mobility. The mobility measurements provide structural information on the ionized oligomers based on their collision cross-sections (Ω) which depend on the geometric shapes of the ions. Theoretical calculations of p

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23

Gennen, Jérôme. "Characterization of CCX2, a member of the cation antiporter CaCA superfamily and its role in metal homeostasis." Doctoral thesis, Universite Libre de Bruxelles, 2011. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209864.

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Caractérisation de CCX2, un élément de la super-famille des antiports cationiques CaCA et de son rôle dans l’homéostasie minérale.<p><p>L'homéostasie des métaux est importante pour les fonctions cellulaires. Elle dépend de la régulation stricte des transports cellulaires d'ions métalliques et des espèces métalliques complexées. Nous rapportons ici l'analyse fonctionnelle chez Arabidopsis thaliana d'un élément de la superfamille CaCA, CCX2 (Calcium Cation eXchanger 2) qui n’est pas encore caractérisé dans les plantes. Nous avons pu observer en utilisant une fusion aves la protéine fluorescente

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24

Sarowar, Chowdhury Hasan Chemistry Faculty of Science UNSW. "Electrospray ionisation fourier transform ion cyclotron resonance and quadrupole ion trap mass spectrometry of metal-flavonoid complexes." Publisher:University of New South Wales. Chemistry, 2009. http://handle.unsw.edu.au/1959.4/43658.

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Positive-ion electrospray ionisation Fourier transform ion cyclotron resonance and ion trap mass spectrometry have been used to investigate the reactions of the flavonoids 3-hydroxyflavone, 5-hydroxyflavone, 5-methoxyflavoe, quercetin, quercitrin and rutin with monovalent Li+, Na+, K+ and Cs+, divalent Cu2+, Zn2+ and Pb2+ and trivalent La3+ and Eu3+ metal cations. The effect of capillary-skimmer potential difference and the ion residence time in the hexapole ion trap of the Fourier transform ion cyclotron resonance mass spectrometer are systematically investigated for the flavonoid-alkali and

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25

Martí, Calatayud Manuel César. "STUDY OF THE TRANSPORT OF HEAVY METAL IONS THROUGH CATION-EXCHANGE MEMBRANES APPLIED TO THE TREATMENT OF INDUSTRIAL EFFLUENTS." Doctoral thesis, Universitat Politècnica de València, 2015. http://hdl.handle.net/10251/46004.

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La presente Tesis Doctoral consiste en la determinación de las propiedades de transporte de diferentes especies catiónicas a través de membranas de intercambio catiónico. Las membranas de intercambio iónico son un componente clave de los reactores electroquímicos y de los sistemas de electrodiálisis, puesto que determinan el consumo energético y la eficiencia del proceso. La utilización de este tipo de membranas para el tratamiento de efluentes industriales no es muy extendida debido a los requisitos de elevada resistencia química y durabilidad que deben cumplir las membranas. Otro asunto impo

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26

Chirat, Christine. "Effet de l'ozone sur les hydrates de carbone et la lignine des pâtes à papier chimiques : application au blanchiment." Grenoble INPG, 1994. http://www.theses.fr/1994INPG0049.

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L'objectif de ce travail est d'analyser les effets de l'ozone sur les hydrates de carbone et la lignine contenus dans les pates a papier chimiques, et en particulier dans les pates kraft de résineux, ainsi que les conséquences de ces effets sur la qualité des pates blanchies a l'ozone, et sur les résultats obtenus dans des stades de blanchiment ultérieurs. Apres un premier chapitre consacre a une revue de la littérature sur l'ozone en milieu aqueux, sur son action sur les hydrates de carbone et la lignine, ainsi que sur son utilisation dans le blanchiment des pates a papier chimiques, un deuxi

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27

Spångberg, Daniel. "Cation Solvation in Water and Acetonitrile from Theoretical Calculations." Doctoral thesis, Uppsala University, Department of Materials Chemistry, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3598.

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<p>Metal ions solvated in aqueous, non-aqueous, and mixtures of solvents occur in many chemical contexts, for example in electrochemical applications and solvent separation. Solvated ions appear in high concentration in the living organisms, where their presence or absence can fundamentally alter the functions of life. In many of these cases, understanding the selective solvation and the dynamics of the ions is essential for the understanding of the processes involved.</p><p>Computer simulation provides a molecular level of detail of the solvation process usually not available from experiments

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28

Inamoto, Jun-ichi, and Junichi Inamoto. "Electrochemical Characterization of Surface-State of Positive Thin-Film Electrodes in Lithium-Ion Batteries." Kyoto University, 2017. http://hdl.handle.net/2433/226784.

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29

Mabakane, Elizabeth Nontombi. "The determination of distribution coefficient for some elements on the macroporous cation exchanger Amberlyst 15 using nitric acid – methanol mixtures." Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2329.

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Thesis (MTech (Chemistry))--Cape Peninsula University of Technology, 2016.<br>The main purpose of this study is to understand the application of ion exchange chromatography on separation of charged ions of elements. Ion exchange chromatography is an analytical method, which is used for the separation of elements, quantitation and qualitation. The use of Amberlyst 15 resin as a source of separation for metal ions has been investigated and studies in various academic disciplines such as chemistry and material science. In this research study, Amberlyst 15 resin was investigated in order

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30

Botella, Jean-Marie. "Etude sur reactions modeles du transfert de groupement carboxyle catalyse par la biotine." Toulouse 3, 1987. http://www.theses.fr/1987TOU30059.

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Etude cinetique des reactions d'hydrolyse et d'aminolyse d'esters allophaniques, reactions constituant une situation modele de la reaction de transfert du groupement carboxyle de la carboxybiotine a l'accepteur ceci dans les reactions catalysees par le coenzyme biotine

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31

Palacios, Manuel A. "Materials and Strategies in Optical Chemical Sensing." Bowling Green State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1225902887.

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32

Touchard, Pascale. "Propriétés d'échange et de transport ioniques des parois végétales isolées de cals de lin." Rouen, 1988. http://www.theses.fr/1988ROUES017.

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33

Niehus, Christina. "Untersuchungen zur Selektivität unterschiedlich substituierter Iminodiessigsäure-Ionenaustauscher gegenüber zweiwertigen Metallionen." Phd thesis, Universität Potsdam, 2007. http://opus.kobv.de/ubp/volltexte/2007/1319/.

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Zur selektiven Entfernung von Schwermetallen aus industriellen Abwässern und Prozesslösungen der metallverarbeitenden Industrie werden synthetische metallkomplexierende funktionelle Polymere – mit Iminodiessigsäure (IDE) als aktive Spezies – seit Jahren erfolgreich zur Eliminierung störender Kationen eingesetzt. Ständig steigende Anforderungen an die Qualität der aufzubereitenden Wässer verlangen nach leistungsfähigen Selektivaustauschern, die den Erhalt der Eigenschaften von Prozesslösungen (z. B. pH-Wert, Salzgehalt) ermöglichen. Ziel der Untersuchungen war es, die strukturellen Matrixeinflü

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34

Cai, Feng Xian. "Influence du coordinat triéthylphosphine sur la réactivité des ions Ni+ supportés dans la réactivité d'oligomérisation de l'éthylène." Paris 6, 1986. http://www.theses.fr/1986PA066077.

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Les deux premiers chapitres sont consacrés à la préparation et à la caractérisation des catalyseurs aux différentes étapes de leur élaboration par l'utilisation conjointe des spectroscopies RPE, Uv-Vis et IR. Les deux derniers chapitres sont consacrés aux tests catalytiques et à l'étude du mécanisme réactionnel et de l'empoisonnement des sites actifs.

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35

Palla, Veladri. "Heterometallic interactions of d⁸-d¹⁰ metal ions in the presence of +2 cations /." 2007. http://www.library.umaine.edu/theses/pdf/PallaV2007.pdf.

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36

Whitbread, Sonya L. "A stability and mechanistic study of pendant arm ligand complexes / by Sonya L. Whitbread." 1999. http://hdl.handle.net/2440/19444.

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Erratum pasted onto front-end paper.<br>Includes bibliographical references.<br>xi, 225 leaves : ill. ; 30 cm.<br>Title page, contents and abstract only. The complete thesis in print form is available from the University Library.<br>Investigates alkali and alkaline earth complexes of pendant arm ligands.<br>Thesis (Ph.D.)--University of Adelaide, Dept. of Chemistry, 1999

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37

Li, Hsin-Hung, and 黎訓宏. "Synthesis of Anthryl Triazole Bridged Bispillar[5]arene and Biscalix[4]arene as Fluorogenic Sensors of Imidazolium Cations and Metal Ions." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/59558766668771970898.

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碩士<br>國立交通大學<br>應用化學系碩博士班<br>103<br>We have synthesized anthryl triazole bridged pillar[5]arene dimer as compound 40 which containing anthracene as a fluorophore by click reaction. Compound 40 was analyzed by UV-Vis absorption spectroscopy, fluorescence emission spectroscopy, ¬1H-NMR titration, ROESY and DOSY, which showed binding abilities toward different nitrogen-contained cations G1 to G5 and influence of varying substituted imidazolium G5 to G8. 　　UV-Vis spectra of compound 40 didn’t change when G1-G8 were added. However, the fluorescence intensity of compound 40 was enhanced when G1, G2,

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38

Mndubu, Yolisile. "Comparative study for iron mediated hydrolysis of 4-nitrophenyl phosphate in cationic and anionic microemulsion media." Thesis, 2005. http://hdl.handle.net/10500/1252.

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The study of rapid cleavage of organophosphate esters by metal ions is of great interest as it is the most important reaction in both biological and environmental sciences. A good understanding of organophosphate hydrolysis by metal ions is important as it can be exploited in formulation of useful detoxifying agents for organophosphate contaminants in the environment. The knowledge can also help in developing effective artificial enzymes. The hydrolysis of 4-NPP in the presence of Ferrous and Ferric ions in o/w microemulsion media was investigated. The reaction was monitored by measuring t

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39

Mazur, Luciana Prazeres. "Brown marine macroalgae as a natural cation exchanger for toxic metal ions separation and recovery from water." Tese, 2017. https://hdl.handle.net/10216/106031.

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40

Mazur, Luciana Prazeres. "Brown marine macroalgae as a natural cation exchanger for toxic metal ions separation and recovery from water." Doctoral thesis, 2017. https://hdl.handle.net/10216/106031.

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41

Page, Alister J. "Ab Initio investigation of the electronic structure and rovibrational spectroscopy of group-I and II metal hydrides and helides." 2008. http://hdl.handle.net/1959.13/38359.

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Research Doctorate - Doctor of Philosophy (PhD)<br>(**Note: this abstract is a plain text version of the author's abstract, the original of which contains characters and symbols which cannot be accurately represented in this format. The properly formatted abstract can be viewed in the Abstract and Thesis files above.**) The electronic structure and rovibrational spectroscopy of MH2, MHn+2, HMHen+ and MHen+2 (M = Li, Be, Na, Mg, K, Ca; n = 1, 2) have been investigated using correlated ab initio ansatz. In order to determine the efficacy of various electronic structure methods with respect to Gr

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42

Nath, Suvadeep. "Modular Design Of Fluorescent Cation Sensors On A Bile Acid Scaffold." Thesis, 2006. http://etd.iisc.ernet.in/handle/2005/1335.

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Bile acid-based cation sensors involving through space photo-induced electron transfer (PET) processes have been synthesized. In this approach, appropriate known fluorophores and aza crown ether receptor units were attached on a suitable bile acid scaffold. A through space photo induced electron transfer from N-atom of the aza 18-crown-6 to the excited pyrene was responsible for quenching of the pyrene fluorescence. A fluorescence enhancement was observed with the addition of K+ due to the inhibition of fluorescence quenching by PET mechanism. In order check the relationship between the sens

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43

Каляева, М. И., та M. I. Kalyaeva. "Синтез и функциональные свойства композиционных сорбентов «катионит КУ-2x8-гидроксид олова (IV)» для избирательного извлечения тяжелых металлов : магистерская диссертация". Master's thesis, 2017. http://hdl.handle.net/10995/54443.

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В магистерской диссертации представлена методология пошагового синтеза композиционного сорбента на основе катионообменника и гидроксида титана (IV). Показаны результаты сорбции меди (II) и других тяжелых металлов синтезированным композиционным сорбентом. Для математического моделирования результатов сорбции были использованы изотермы Ленгмюра, Фрейндлиха и Темкина. Установлено, что модель Ленгмюра наиболее точно описывает сорбционный процесс. Определены константы модели Ленгмюра и площадь удельной поверхности композиционного сорбента. Гранулы композиционного сорбента изучены с помощью методов

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