ABSTRACT
Research to find new or to improve microencapsulation techniques to process newly discovered active molecules is in constant progress because of the limitations of the current pharmacopeia. The new active molecules found with the help of advances in biotechnology and therapeutic science are more often peptides or proteins; they are very active in small doses, sensitive to unfolding by heat or organic solvents, available only in small quantities, and very expensive. Additionally, many new molecules that are synthesized have poor solubility in aqueous media, and some of them, when used in their typical therapeutic concentrations, such as paclitaxel, also have poor solubility in lipidic media.
