Figure 2.

Evaluating the stability of L-IFPT nanoparticles by measuring changes of physical characteristics at 4 °C and 25 °C for 6 months. The physical characteristics of L-IFPT nanoparticles, including the size (A) and the surface charge (B), were not significantly changed for up to 6 months of storage at the 4 °C, while those were significantly increased after 3 months of storage at 25 °C, when compared to the baseline time point. Values are means ± SD (n = 3). Statistical differences at p-values less than 0.05 were considered to be significant. *, **, and *** signs show p = 0.03, p = 0.01, and p <0.01, respectively.