Figure 7: Column chart of percent of viability of AGS cells after 24-hour treatment with free doxorubicin (Dox) and magnetic nanoparticles targeted with folic acid and loaded with doxorubicin (Dox-MNPFA). This graph is confirmed the stronger effect of Dox-loaded nanoparticles than compared to free form of Dox on inhibition of cell growth. Percents of viability of cells in two modes of treated with Dox-loaded nanoparticles and free doxorubicin, shows a statistically significant difference at a significance level of 95%.