Desenvolvimento e avaliação de esferas de quitosana / Dysphania ambrosioides (L.) Mosyakin & Clemants liofilizadas para aplicação como biomaterial.

Abstract

The objective was to produce and evaluate of chitosan spheres/ Dysphania ambrosioides (L.) Mosyakin & Clemants (mastruz) to use as biomaterial. Plant specimens were collected, identified botanically and crude alcohol extract (CAE) were obtained. For the production of the chitosan and chitosan spheres with CAE, the Ionotrope Gellification technique was used. The spheres were divided into three groups: one exemple group of pure chitosan; a second exemple group with low CAE concentration and a third exemple group with a higher CAE concentration; and them characterized by Optical Microscopy (OM), Scanning Electron Microscopy (SEM) and swelling degree (SD). OM showed on the external and internal surfaces, spheres with defined limits and with color change as the percentage of CAE was increased, becoming darker. The SEM showed, in spheres with higher CAE concentration, in comparison with the ones with low CAE concentration: A decrease in size, increase in the quantity and intercommunication of the pores, and the alteration of the geometric shape of both the spheres and their pores. In the analysis of the swelling degree, there were no significant differences between the groups. Its possible to produce chitosan spheres / Dysphania ambrosioides (L.) Mosyakin & Clemants (mastruz) which in the group with the highest percentage of CAE the samples were darker and with higher amounts and intercommunication pores and that although there was swelling, no significant difference was observed between the groups.