Polyanhydrides
Mostrando 1-4 de 4 artigos, teses e dissertações.
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1. Hidrogéis de PVP e blendas de PVP/polianidridos como potenciais curativos para feridas crônicas / PVP hydrogels and PVP/Polyanhydride blends as potential materials for chronic wounds dressings
Hidrogéis compreendem uma importante classe de materiais poliméricos adequados à aplicação como curativos de feridas e queimaduras. A estrutura tridimensional hidrofílica dos hidrogéis permite que estes mantenham a umidade ideal no leito das feridas, absorvam o exsudato e não causem danos ao novo tecido durante as trocas dos curativos. No caso dos hi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/10/2011
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2. Erosion kinetics of hydrolytically degradable polymers.
Degradable polymers are beginning to play an increasing role as materials for environmental and medical applications. Understanding factors that control erosion, such as bond cleavage and the dissolution and diffusion of degradation products, will be critical to the future development of these materials. Erosion kinetics, photomicroscopy, and infrared spectr
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3. Controlled release of polypeptides from polyanhydrides.
The effects of both polymer hydrophobicity and addition of stabilizers on the release and integrity of polymer-encapsulated proteins were studied. By using very hydrophobic poly[1,3-bis(p-carboxyhydroxy)hexane anhydride] with sucrose as an excipient, both recombinant bovine somatotropin and zinc insulin were released intact over 3 weeks. The released protein
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4. Ultrasound-enhanced polymer degradation and release of incorporated substances.
The effect of ultrasound on the degradation of polymers and the release rate of incorporated molecules within those polymers was examined. Up to 5-fold reversible increases in degradation rate and up to 20-fold reversible increases in release rate of incorporated molecules were observed with biodegradable polyanhydrides, polyglycolides, and polylactides. Up