Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 37 for “"cryo-TEM"”.
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Visualization, Kinetics, and Thermodynamics of DNA-Protein Interactions
… (FCS) as well as the imaging technique cryo-transmission electron microscopy (cryo-TEM) were used to gain kinetic, thermodynamic and structural information about DNA–protein interactions. Furthermore, the micrographs obtained by cryo-TEM were compared to AFM images taken in a previous …
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Structure, Dynamics and Association of Thermosensitive Core-Shell Particles
… by the crosslinker N,N-methylenebisacrylamide. Cryo-TEM, SAXS and DLS have been used to investigate the structure and swelling of the particles. The micrographs show directly inhomogeneities of the network. Moreover, a buckling of the shell from the core particle was observed. The buckling …
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CRYOGENIC MICROSCOPIES OF ENERGY STORAGE MATERIALS: INSIGHTS INTO METAL ANODES, SOLID-ELECTROLYTE INTERFACES, AND MXENES
… storage technologies, focusing on metal anode systems that promise higher energy density at lower cost. This dissertation presents comprehensive research that advances our understanding of energy storage materials, including alkali metal anodes, solid-electrolyte interfaces (SEI), and MXenes …
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Micelles and Interpolyelectrolyte Complexes formed by Polyisobutylene-block-Poly([meth]acrylic acid) - Synthesis of Polymers and Characterization in Aqueous Solutions
… due to a change of the aggregation numbers. From cryo-TEM, a spherical shape of the micelles is clearly seen. This allows us to evaluate the SANS data using a model of a spherical particle with protruding arms. Evaluation of the SANS curves evidences about changes in Nagg with pH and with ionic …
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Synthesis and Characterization of immobilized Gold Nanoparticles and Binary Gold Nanoalloys on Cationic Spherical Polyelectrolyte Brushes and their Application as a Catalyst
… was studied in detail. The models were proved by cryogenic transmission electron microscopy (cryo-TEM) and dynamic light scattering (DLS), if it’s in good agreement with the resulting systems (Chapter 3.2). It was possible to show, that cationic SPB could be used for the generation of gold …
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Structural analysis of nanoparticles by small angle X-ray scattering
… x-ray scattering (SAXS), electron microscopy (TEM and cryo-TEM) and dynamic light scattering (DLS). Two systems with totally di_erent morphologies and compositions have been investigated: spherical particles of calcium-phosphate-protein complexes and hamburgers of semi-crystalline …
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Sorption-based atmospheric water harvesting: from atoms to applications
… 2017 with the development of a solar-powered system utilizing metal-organic framework (MOF) sorbents to extract water from the air. While groundbreaking, this proof-of-concept device produced only a few milliliters of water, far from sufficient to meet even a single person’s daily water needs. A …
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Investigations on the Behaviour and Properties of Different Types of Unilamellar Vesicles
… which increases the packing parameter. The systems undergo a phase transition with increasing the concentration of co-surfactants from micellar phase to vesicular phase via a two-phase region. For the system with geraniol, on the other hand, it was observed that at higher concentration of …
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The multifarious self-assembly of triblock copolymers : from multi-responsive polymers and multi-compartment micelles
… copolymers exhibiting Lower Critical Solution Temperature (LCST) behavior in water. While the first phase transition triggers the self-assembly of triblock copolymers upon heating, the second one allows to modify the self-assembled state. The stepwise self-assembly was followed by turbidimetry, …
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Σχηματισμός νανοδομών μέσω ηλεκτροστατικής σύμπλεξης POEGMA-b-Q(PDMAEMA)-ελαϊκού νατρίου προς εγκλωβισμό κουρκουμίνης
… και Κρυογενή Ηλεκτρονική Μικροσκοπία Διέλευσης (cryo-TEM). Οι μέθοδοι που χρησιμοποιήθηκαν αποκάλυψαν ότι τα σύμπλοκα πολυμερούς-επιφανειοδραστικής ουσίας σχηματίζουν σφαιρικά και σκωληκοειδούς δομής μικκύλια. Όταν εγχύθηκε η κουρκουμίνη στο διάλυμα, εγκλωβίστηκε με επιτυχία στον υδρόφοβο πυρήνα …
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Counterion identity effects on the self-assembly processes in a series of perfluorinated surfactant - water mixtures
… nuclear magnetic resonance (211 NMR) and cryo-transmission electron microscopy (cryo-TEM). The results from the phase diagram studies flill into two groups. Firstly the ammonium (A) and tetramethylanmionium (TMA) counterions show a phase behaviour with nematic (N) and random mesh (MJi 1 …
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Nanostructures for protection and vehiculation of bioactive molecules
… play a crucial role in engineering innovative systems useful in nanomedicine applications. For example, the most promising drug delivery systems belong to the colloidal domain and, particularly, to the soft matter. Indeed, a growing effort in the discovery of innovative therapies has led to an …
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Einschluss von 5-Fluorouracil (5-FU) in vesikuläre Phospholipidgele : in vitro und in vivo Untersuchungen zur Stabilität, Pharmakokinetik und antitumoralen Wirksamkeit
… bzw. Lamellarität (PCS und Cryo-TEM), in vitro Freisetzung, Lipidstabilität (HPTLC) und Phasenübergangstemperatur (DSC). <br>In vivo wurden zwei Formulierungen an tumortragenden athymischen Nacktmäusen in insgesamt sieben Wirksamkeits- und Verträglichkeitsstudien mit vier …
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The interaction of antimicrobial peptides with lipopolysaccharide aggregates and model membranes.
… using small-angle neutron scattering (SANS) and cryo transmission electron microscopy (cryo-TEM) to assess any modication induced to the colloidal structure of LPS, ideally from a high toxic state to a lower toxic morphology of the aggregates. The peptides LL37 and LFb are able to induce changes …
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Development and physical characterisation of polyethylene glycol glycerides-based gel formulations for macromolecule delivery
Lipid-based delivery systems offer many advantages on enhancing the bioavailability of protein/peptides. Gelucire 50/13 is a complex mixture of glycerides and PEG. It is mainly used in solid oral formulations for delivering small molecular weight drugs. The purpose of this project was to develop …
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Formation and transformation kinetics of iron oxy-hydroxides and effects of adsorbed oxyanions
… with increasing the oxyanion surface loading. Cryogenic transmission electron microscopy (Cryo-TEM) was also used to study the effect of oxyanion surface complexes (NO3- and PO43-) on the nucleation and growth of Gt and Hm during Fh transformation. Our results show that Gt first was formed from …
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Proliposome Technology for Protein Delivery
… to the potential of the respiratory tract for systemic delivery of macromolecules, particularly proteins and peptides. However, limitations such as short transit time and loss of activity of some proteins and peptides in the respiratory tract need to be overcome. Consequently, the utility of …
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Novel microemulsions with an anionic/non-ionic surfactant mixture
… Diesen makroskopisch einphasig erscheinenden Systemen liegen jedoch hoch komplexe Nanostrukturen zu Grunde. Die in wissenschaftlicher Hinsicht bislang am besten untersuchten und verstandenen Mikroemulsionssysteme bestehen entweder aus Wasser, Öl und einem einzigen elektrisch ungeladenen …
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Photo-reactive Surfactant and Macromolecular Supramolecular Structures
… dibromide (12-2-12). Cryogenic transmission electron microscopy (cryo-TEM) and solution rheological experiments revealed micellar morphological transitions of 12-2-12 in water and water:methanol (1:1 vol). Electrospinning efforts of 12-2-12 from water did not produce …
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Methoden zur Charakterisierung von großtechnisch hergestellten Lipoplexen zum Gentransfer
Die Instabilität von lipidbasierten Gentransfersystemen und die damit verbundene Schwierigkeit der großtechnischen Herstellung und Lagerung ist ein schwerwiegendes Problem für die Entwicklung und Anwendung gentherapeutischer Arzneimittel. <br>Im Rahmen dieser Arbeit wird eine eingehende …
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