Figure 8: Column chart of percent of viability of AGS cells after 48-hour treatment with free doxorubicin (Dox) and magnetic nanoparticles targeted with folic acid and loaded with doxorubicin (Dox-MNPFA). In this range of time both compounds have almost the same toxicity on growth inhibition of cells. Comparison of cell viability in two modes that treated with free Dox and Doxcarrying nanoparticles showed that at concentrations of 1 and 4 μM, inhibitory effect of this two compounds is significantly different. But in concentrations of 7 to 15 μM, a significant difference in the survival rate of the AGS cells cannot be seen between these two compounds.