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Abstract
Multiparticulate drug delivery systems called microspheres are created to achieve delayed or controlled drug administration in order to increase bioavailability, stability, and to target the drug to a specific place at a set rate. They are made of natural, semi-synthetic, and synthetic polymers as well as other protective ingredients like polymeric wax. Microspheres are typically free-flowing powders made of proteins or synthetic polymers, with particle sizes ranging from 1-1000 m. The variety o

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