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Resolution: standard / high Figure 4.
Changes in the surviving fractions of the TiO2-treated HeLa cells with histidine. The concentration of the three TiO2 samples is 200 μg/mL and L-histidine is 20 mM.
Li et al. Nanoscale Research Letters 2011 6:356 doi:10.1186/1556-276X-6-356 |
