Fig. 5From: Polyethylenimine-CO2 adduct templated CaCO3 nanoparticles as anticancer drug carrierIn vitro Ca2+ and DOX release behavior of drug-loaded CaCO3 nanoparticles. The Ca2+ and DOX released more swiftly in the particles with PEI-CO2 A, C than in those with PEI B, D. For free DOX, over 80% of DOX was released through the dialysis membrane in 2 h DBack to article page