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(A.) SEM micrograph of PLGA microparticles encapsulating tetanus toxoid prepared via coacervation. (B.) Antibody response of mice immunized with microparticles releasing tetanus toxoid (open symbols) and tetanus toxoid adsorbed to aluminium (closed symbols).113 (C.) Optical image of PLGA microparticles encapsulating triptorelin during phase separation. (D.) Phase diagram for PLGA microparticle formation via coacervation with the stability window shown in black.114
