Figure 4.

Toxicity of the polymer toward HepG2 cells. Cells were incubated in the presence or absence of the polymer (0–30 μg/mL) for 48 h in a 24-well plate. The cell viability (%) was calculated as the ratio of the number of unstained cells to the total number of cells

Asai et al. Nanoscale Research Letters 2008 4:229-233   doi:10.1007/s11671-008-9230-5