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Carboxymethyl chitosan-graft-phosphatidylethanolamine : amphiphilic matrices fo...
Prabaharan, M.; Reis, R. L.; Mano, J. F.Modified carboxymethyl chitosan (CMC) containing phosphatidylethanolamine (PEA) groups were synthesized by a 1- ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC)-mediated coupling reaction. The structure of the modified CMC exhibiting an amphiphilic character was analysed by FT-IR and 1H NMR. CMC-g-PEA beads were prepared with sodium tripolyphosphate (TPP) by ionic-crosslinking. The beads sizes were in range fr...
Treatment of wool fibres with subtilisin and subtilisin-PEG
Silva, Carla J. S. M.; Prabaharan, M.; Gübitz, Georg M.; Paulo, Artur CavacoIn this work the diffusion of serine proteases into wool fabrics and yarns was studied. The proteases used were free subtilisin and subtilisin-PEG (the same enzyme that was covalently cross linked to polyethylene glycol). It is shown that the adsorption and diffusion is facilitated by the pre-treatment performed, being the alkaline surfactant washing and bleaching the most effective in what concerns enzyme adso...
Graft copolymerized chitosan : present status and applications
Jayakumar, R.; Prabaharan, M.; Reis, R. L.; Mano, J. F.Chitosan is a natural based polymer obtained by alkaline deacetylation of chitin, exhibiting excellent biological properties such as biodegradation in the human body, and immunological, antibacterial, and wound-healing activity. Chitosan has also been found to be a good candidate as a support material for gene delivery, cell culture and tissue engineering. However, practical use of chitosan has been mainly conf...
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