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<dc:title xml:lang="fr">Préparation et caractérisation de microbulles fonctionnelles stabilisées par des fluorocarbures et décorées de nanoparticules dendronisées : évaluation comme agents du contraste bimodaux pour l'IRM et l'imagerie par ultrasons</dc:title>
<dcterms:alternative xml:lang="en">Preparation and characterization of functional microbubbles stabilized with fluorocarbons and decorated with dendronised nanoparticles : Evaluation as bimodaux contrast agents for MRI and ultrasound imaging</dcterms:alternative>
<dc:subject xml:lang="fr">Microbulle</dc:subject>
<dc:subject xml:lang="fr">Fluorocarbure</dc:subject>
<dc:subject xml:lang="fr">Phospholipide</dc:subject>
<dc:subject xml:lang="fr">Monocouche</dc:subject>
<dc:subject xml:lang="fr">Interface</dc:subject>
<dc:subject xml:lang="fr">Interaction fluor-fluor</dc:subject>
<dc:subject xml:lang="fr">Dendron</dc:subject>
<dc:subject xml:lang="fr">Nanoparticule</dc:subject>
<dc:subject xml:lang="fr">Agent de contraste bimodal</dc:subject>
<dc:subject xml:lang="fr">Imagerie par ultrasons</dc:subject>
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<dc:subject xml:lang="en">Microbubble</dc:subject>
<dc:subject xml:lang="en">Fluorocarbon</dc:subject>
<dc:subject xml:lang="en">Phospholipid</dc:subject>
<dc:subject xml:lang="en">Monolayer</dc:subject>
<dc:subject xml:lang="en">Interface</dc:subject>
<dc:subject xml:lang="en">Fluorine-fluorine interaction</dc:subject>
<dc:subject xml:lang="en">Dendron</dc:subject>
<dc:subject xml:lang="en">Nanoparticle</dc:subject>
<dc:subject xml:lang="en">Bimodal contrast agent</dc:subject>
<dc:subject xml:lang="en">Ultrasound imaging</dc:subject>
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<tef:elementdEntree autoriteExterne="059303476" autoriteSource="Sudoc">Produits de contraste paramagnétiques</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="028921011" autoriteSource="Sudoc">Imagerie par résonance magnétique</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="034650040" autoriteSource="Sudoc">Dendrimères</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="031725562" autoriteSource="Sudoc">Hydrocarbures fluorés</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">Cette Thèse vise à préparer et caractériser des microbulles fonctionnelles stabilisées par un fluorocarbure gazeux et décorées des nanoparticules magnétiques dendronisées. L’influence du mode d’introduction du perfluorohexane sur les monocouches de phospholipides, ainsi que sur les propriétés des microbulles, a été évaluée. Les comportements en monocouches de Langmuir de dendrons, ainsi que des mélanges de dendrons et de phospholipides ont été étudiés.Les interactions fluor-fluor qui s’établissent entre le gaz fluoré et le groupe terminal fluoré des dendrons promeuvent l’adsorption des nanoparticules dendronisées à l’interface air/eau. Des microbulles petites et stables décorées de nanoparticules dendronisées ont été préparées. Ces microbulles magnétiques ont été évaluées en tant que agents de contraste bimodaux pour l’IRM et pour l’imagerie par ultrasons sur un modèle murin, en collaboration avec l’Universitätklinikum de Freiburg. Ce travail a été soutenu par INTERREG V (Nanotransmed).</dcterms:abstract>
<dcterms:abstract xml:lang="en">This Thesis focuses on the preparation and characterization of microbubbles stabilized with a fluorocarbon gas and decorated with dendronized magnetic nanoparticles. The impacts of perfluorohexane exposure mode on Langmuir monolayers formed by phospholipids and on the properties of microbubbles were evaluated. The behaviours of Langmuir monolayers formed by dendrons and of the mixtures of dendrons and phospholipids were investigated. The attractive fluorine-fluorine interactions that develop between the fluorocarbon gas and the fluorinated terminal group prompt the adsorption of nanoparticles grafted with dendrons to the air/water interface. Small and stable microbubbles decorated with dendronized iron oxide nanoparticles were prepared. The magnetic microbubbles were examined as bimodal contrast agents for MRI and ultrasound imaging on a murine model in collaboration with the Universitätklinikum in Freiburg. This work was supported by the INTERREG V (Nanotransmed).</dcterms:abstract>
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