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. 2016 Jul 19;11(7):e0159684. doi: 10.1371/journal.pone.0159684

Fig 8. A549 cell-associated Ni-fraction.

Fig 8

The amount of Ni that was taken up by the cells or bound to the cell membrane was analyzed with AAS after 4 h of exposure to Ni metal (Ni-n, Ni-m1 and Ni-m2) and Ni oxide (NiO-n) particle suspensions (20 μg cm-2 of total Ni). The cell-associated Ni-fraction is presented as the percentage of the total amount of added Ni in the exposure suspensions. Each bar represents the mean value of three independent experiments (n = 3), and the error bars the standard deviation of the mean value.