Figure 3.

The cytotoxicities and the photokilling effects of pure TiO2 and N-550-2 samples. With the concentration of 200 μg/mL on HeLa, QGY, and KB cells. The control groups were also shown for comparison.

Li et al. Nanoscale Research Letters 2011 6:356   doi:10.1186/1556-276X-6-356
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