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<dc:title xml:lang="en">Contribution to the study of gels based on nanoemulsion : formulations and rheological characterization</dc:title>
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<dc:subject xml:lang="fr">Nanoémulsions</dc:subject>
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<dc:subject xml:lang="en">Nanoemulsions</dc:subject>
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<dcterms:abstract xml:lang="fr">Les nanoémulsions sont des systèmes dispersés constitués de gouttelettes d’une centaine de nanomètres, composés de deux phases non miscibles stabilisées avec des agents tensioactifs, dans le but d’obtenir un système physico-chimique stable. Les formulations de nanoémulsions offrent divers avantages tels que la possibilité d’administration de médicaments à faible solubilité, d'agents de diagnostics ou biologiques. Elles sont également utilisées pour cibler certains tissus et lésions, et peuvent assurer une libération prolongée de médicaments. De manière générale, la formulation de nanoémulsions peut améliorer la biodisponibilité de médicaments. Dans ce cadre, les objectifs de cette thèse de doctorat sont d’une part d’étudier des formulations de gels constitués de nanoémulsions en l’absence de polymères utilisés habituellement pour la réalisation d’hydrogels et d’autre part de caractériser les hydrogels fabriqués d’un point de vue de leurs propriétés rhéologiques. Les différents paramètres de formulation, composition et nature chimique des composés sont également étudiés de manière à permettre de comprendre leur lien avec les profils de libération de molécules modèles encapsulées.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Nanoemulsions are dispersed systems consisting of droplets of around one hundred nanometers, composed of two immiscible phases stabilized with surfactants, in order to obtain a stable physicochemical system.Nanoemulsion formulations offer various advantages such as the ability to deliver low solubility drugs, diagnostic or biological agents. They are also used to target certain tissues and lesions, and can provide sustained drug release. In general, the formulation of nanoemulsions can improve the bioavailability of drugs.In this context, the objectives of this doctoral thesis are on the one hand to study gel formulations made up of nanoemulsions in the absence of polymers usually used for the production of hydrogels and on the other hand to characterize the hydrogels produced. From the point of view of their rheological properties, the various formulation parameters, composition and chemical nature of the compounds are also studied so as to make it possible to understand their link with the release profiles of encapsulated model molecules.</dcterms:abstract>
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