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<dc:title xml:lang="fr">Étude physico-chimique, fonctionnalisation et applications des films de polysaccharides</dc:title>
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<dc:subject xml:lang="fr">Pulvérisation alternée et simultanée</dc:subject>
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<dc:subject xml:lang="fr">Complexes</dc:subject>
<dc:subject xml:lang="fr">Films</dc:subject>
<dc:subject xml:lang="fr">Revêtements</dc:subject>
<dc:subject xml:lang="fr">Antibactérien</dc:subject>
<dc:subject xml:lang="fr">Antifongique</dc:subject>
<dc:subject xml:lang="fr">Peptides</dc:subject>
<dc:subject xml:lang="en">Alternated and simultaneous spraying</dc:subject>
<dc:subject xml:lang="en">Polysaccharides</dc:subject>
<dc:subject xml:lang="en">Complex</dc:subject>
<dc:subject xml:lang="en">Films</dc:subject>
<dc:subject xml:lang="en">Coating</dc:subject>
<dc:subject xml:lang="en">Antibacterial</dc:subject>
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<dc:subject xml:lang="en">Peptides</dc:subject>
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<tef:elementdEntree autoriteExterne="034056718" autoriteSource="Sudoc">Antibiotiques peptidiques</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="027493105" autoriteSource="Sudoc">Infections nosocomiales</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">En France, 5 % des patients hospitalisés contractent une infection nosocomiale. Pour lutter contre ce problème, nous avons développé un nouveau type de films biocompatibles, pouvant être fonctionnalisés, à base de polysaccharides construit par pulvérisation alternée ou simultanée pour les utiliser comme revêtements d’implants biomédicaux. La pulvérisation, issue du dépôt couche-par-couche de polyanions et de polycations, permettent un gain de temps conséquent.D’abord, la complexation du couple chitosane/acide hyaluronique et le dépôt de multicouches sur ces complexes ont été étudiés. Puis, nous avons étudié la construction de films de 3 couples de polysaccharides par pulvérisation alternée et simultanée. La biocompatibilité de ces films a été étudiée pour valider leur utilisation en tant que revêtements de biomatériaux. Enfin, leur fonctionnalisation a été abordée. L’activité de ces revêtements contre différents pathogènes et leur biocompatibilité ont été testées. Cette étude montre qu’il est possible de construire par pulvérisation des films de polysaccharides et de les rendre actifs grâce au greffage de peptides antimicrobiens.</dcterms:abstract>
<dcterms:abstract xml:lang="en">In France, 5 % of the hospitalized patients develop a hospital-acquired infection. To fight this problem, we developed a new kind of biocompatible films based on polysaccharides , which can be functionalized, built by spraying process. Derived from layer-by-layer dipping of polyanions and polycations, spraying let to spare time. First, we focused on the complexation of Chitosane and hyaluronic acid. We investigated the complexation and multilayers coating on this type of complexes. Next, we studied the buildup of polysaccharide films by alternate and simultaneous spray. Biocompatibility of the polysaccharide films was tested to validate their use as biomaterial coatings. Eventually, we investigated their functionalization. Their activityx against different pathogens and their biocompatibility were tested.This study shows that it is possible to build polysaccharide films by spraying methods and to render these films active against different pathogens by grafting antimicrobial peptides.</dcterms:abstract>
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