-Unloaded microspheres were prepared from polyhydroxybutyrate (PHB) and polyhydroxybutyrateco-valerate (PHB-HV) polymers using an oil-in-water emulsion solvent evaporation method. The study was conducted to evaluate how the polymer and some process parameters affect properties of the final microspheres such as particle size, superficial area, zeta potential, surface morphology and microsphere degradation. The variables included surfactant concentration in the emulsion water phase and solvent composition. From the results, it was found that the parameters affecting microsphere size the most were surfactant concentration in the emulsion water phase and solvent composition. Properties such as zeta potential, surface area and surface morphology remained pratically unchanged over the range of the processing conditions studied here.
A presente pesquisa tem como objetivo entender a literatura marginal-periférica como arte literária e agente responsável pela transocialização entre espaços das periferias e espaços acadêmicos, de forma a mostrar o que esses movimentos revelam, mas também o que ocultam. A atuação nesses espaços baseia-se, de início, em duas frentes. A primeira considera as formas de acesso a diversas práticas de letramentos dos grupos de periferias. A segunda, por seu caráter militante, coopera para a democratização dos espaços de saber. Para realizar este estudo, trabalhamos com produções periféricas, textos acadêmicos e não acadêmicos relacionados ao tema e materiais colhidos em saraus e em eventos relacionados às literaturas.
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