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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

A study of cryptate complexes and pendant arm ligand complexes /

Clarke, Philip. January 1992 (has links) (PDF)
Thesis (Ph. D.)--Dept. of Physical and Inorganic Chemistry, University of Adelaide, 1993. / Typescript (Photocopy). Includes bibliographical references.
2

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) /

Weeks, Jennifer Megan. January 2000 (has links) (PDF)
Thesis (Ph.D.)--University of Adelaide, Dept. of Chemistry, 2000? / Errata page pasted opposite title page. Includes bibliographical references.
3

Cryptates and pendant arm ligand complexes /

Stephens, Ashley. January 1994 (has links) (PDF)
Thesis (Ph.D.) -- University of Adelaide, Department of Chemistry, 1995. / Includes bibliographies.
4

Electron transfer and delocalization in mixed-valence monocations of bis- and tris-(diarylamino) derivatives

Odom, Susan A. January 2008 (has links)
Thesis (Ph. D.)--Chemistry and Biochemistry, Georgia Institute of Technology, 2009. / Committee Chair: Marder, Seth; Committee Member: Bredas, Jean-Luc; Committee Member: Collard, David; Committee Member: Kippelen, Bernard; Committee Member: Tolbert, Laren. Part of the SMARTech Electronic Thesis and Dissertation Collection.
5

Cryptates and pendant arm ligand complexes / by Ashley Stephens

Stephens, Ashley January 1994 (has links)
Includes bibliographies. / xi, 240 leaves : ill. ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / The complexation of a range of monovalent and divalent metal ions by the aliphatic bridge cryptands C22C2 and C22C8; and the complexation of alkali metal ions by the pendant arm tetraaza macrocycle 1,4,7,10-tetrakis(2-methoxyethyl)1,4,7,10-tetraazacyclododecane, and the factors effecting complex stability and lability, have been investigated. / Thesis (Ph.D.)--University of Adelaide, Dept. of Chemistry, 1995
6

A stability and mechanistic study of pendant arm ligand complexes / by Sonya L. Whitbread.

Whitbread, Sonya L. January 1999 (has links)
Erratum pasted onto front-end paper. / Includes bibliographical references. / xi, 225 leaves : ill. ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Investigates alkali and alkaline earth complexes of pendant arm ligands. / Thesis (Ph.D.)--University of Adelaide, Dept. of Chemistry, 1999
7

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) / by Jennifer Megan Weeks.

Weeks, Jennifer Megan January 2000 (has links)
Errata page pasted opposite title page. / Includes bibliographical references. / x, 147 leaves : ill. (chiefly col.) ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Addresses the structural, equilibrium and thermodynamic aspects of pendant arm donor triaza macrocyclic ligands and their alkali metal and zinc complexes. Involves ab initio molecular modelling, x-ray crystallographic studies, potentiometric stability constant determinations and NMR kinetic studies. / Thesis (Ph.D.)--University of Adelaide, Dept. of Chemistry, 2000?
8

Interaction of B-DNA and monovalent cations theory and practice in x-ray crystallography /

Moulaei, Tinoush. January 2004 (has links) (PDF)
Thesis (Ph. D.)--Chemistry and Biochemistry, Georgia Institute of Technology, 2005. / Wartell, Roger, Committee Member ; Wilkinson, Angus, Committee Member ; Doyle, Donald, Committee Member ; Hud, Nicholas, Committee Member ; Williams, Loren, Committee Chair. Includes bibliographical references.
9

Membrane fabrication and functionalization for improved removal of monovalent ions from water using electrodialysis

Sheorn, Matthew P 08 December 2023 (has links) (PDF)
Electrodialysis is a membrane separation process that uses an electrical potential to drive the separation. The performance of these systems is largely based on the performance of their ion exchange membranes (IEMs). This research focused on enhancing the performance of IEMs for electrodialysis through surface modification techniques involving chitosan bonded to the surface of commercially available cation exchange membranes (CEMs). The surface functionalization techniques resulted in membranes with improved electrodialysis performance. This research also explored the processing framework to produce functionalized sulfonated PEEK (sPEEK) nanofibers for future consideration as cation exchange membranes. Chitin was deacetylated to form the functionalized biopolymer chitosan, then applied to the surface of CEMs, rendering them more hydrophilic. These membranes were evaluated across several electrodialysis performance metrics. Results demonstrate that adjusting the degree of deacetylation of chitosan to enhance membrane hydrophilicity positively impacted electrodialysis performance. Furthermore, this research evaluated the effectiveness of similarly functionalized membranes to extract Lithium from brine solutions. The chitosan-coated membranes showed improved electrodialysis performance, including enhanced flux, limiting current density, system resistance, selectivity, and fouling resistance. Lastly, the sPEEK nanofibers were produced for the fabrication of ion exchange membranes by manipulating operational parameters to assess their impact. This research presents the successful functionalization of PEEK via sulfonation and electrospinning of the resulting sPEEK. These nanofibers were then pressed to form a solid sPEEK membrane. It was observed that changes in electrical potential and rotational speed influenced fiber diameter and spinnability. A correlation was established between membrane surface hydrophilicity and electrodialysis performance metrics in desalination and lithium extraction applications. This research advanced the understanding of structure-property relationships for CEMs. The research herein proposes techniques for industries such as desalination and lithium extraction that can meet growing demands for clean water and sustainable methods for producing high-value raw material streams.
10

Vers une étude de la division asymétrique des cellules à l'échelle de la molécule unique

Sittner, Assa 08 January 2010 (has links) (PDF)
Le but de ce projet est de développer de nouveaux outils pour explorer des processus d'organisation intracellulaire dynamique dans les cellules vivantes, avec une sensibilité sans précédent. Ce travail se concentre sur deux aspects principaux : le développement d'outils pour l'étude en molécule unique de la division cellulaire asymétrique, et la mise au point de sondes monovalentes qui permettent le suivi d'une protéine individuelle utilisant un nanocristal semiconducteur (ou quantum dot, QD). La division cellulaire asymétrique (DCA) est définie comme une division cellulaire dans laquelle une cellule mère donne naissance à deux cellules filles avec des destins différents (ce qui se manifeste à travers par exemple la taille, le contenu ou le profil d'expression). Notre étude se concentre sur la division cellulaire asymétrique dans les cellules souches neurales de Drosophila melanogaster, appelés neuroblastes. Au cours de la division asymétrique des neuroblasts, avant la séparation de la cellule-mère en deux cellules-filles, certaines molécules dans le cytoplasme se redistribuent de façon asymétrique (polarisée). Ce travail a montré la faisabilité de l'étude de la division cellulaire asymétrique à l'échelle de la molécule unique. Les méthodes ont été conçues et développées pour la conjugaison et la caractérisation des complexes QD-protéines. Nous avons réussi à cibler les protéines localisées de manière asymétrique dans des neuroblastes en division. Cela ouvre la voie à des études intracellulaires de ce phénomène, en utilisant des QDs individuels Ce travail a également mis en évidence la limite principale de ce système expérimental : la nature tridimensionnelle des mouvements. En raison de l'épaisseur de la neuroblate, les QDs sortent du plan focal très souvent. En conséquence, l'obtention des trajectoires suffisamment longues pour le calcul des paramètres de transport, devient très difficile. Toutefois, certaines informations peuvent encore être extraites des données que nous avons obtenues, en analysant la répartition spatiale de "courts-déplacements" dans les films obtenus. Les déplacements des QDs entre deux images consécutives sont regroupés et analysés en fonction de leur emplacement par rapport à une carte polaire normalisée d'un neuroblaste polarisé. Une telle analyse n'a pas besoin des trajectoires longues mais peut, quand même, révèler des differences dans la mobilité des protéines entre les differents domaines de la cellule. Cette analyse est actuellement en cours. Nous avons aussi réussi à produire des sondes monovalentes pour le suivi des proteines membranaires extracellulaires. Ces sondes sont basées sur un fragment de chaîne variable d'anticorp (ScFv). Ces sondes doivent avoir des nombreuses applications dans le suivi des diverses protéines membranaires, mais doivent être améliorées afin de répondre aux exigences rigoureuses du suivi intracellulaire.

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