| 摘要 |
A process for producing microparticles containing biologically active substance, in which process an aqueous solution of the said substance is prepared, this solution is mixed with an aqueous solution of PEG such that the substance is concentrated and/or solidified, the substance is optionally washed, the substance is mixed with an organic polymer solution, the composition obtained is mixed, after the admixture of said polymer solution, with an aqueous polymer solution, thereby forming an emulsion of droplets of first mentioned polymer as the internal phase, said droplets are solidified into microparticles, the microparticles are dried and a release-controlling shell is optionally applied to these.
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