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Table 1 The release of Zn from the different cell growth substrates into the cell medium

From: Growth of a Novel Nanostructured ZnO Urchin: Control of Cytotoxicity and Dissolution of the ZnO Urchin

Cell growth substrate type Total Zn concentration in the cell medium at different sampling times (mg/L, mean ± SD)
3 days (experiment 1) 7 days (experiment 1) 16 h (experiment 2)
Cell medium (background) 0.08 ± 0.02 (n = 4) 0.09 ± 0.01 (n = 4) 0.09 ± 0.01 (n = 4)
Glass cover slip (negative control) 0.12 ± 0.06 (n = 4) 0.08 ± 0.02 (n = 4) 0.18 ± 0.04 (n = 4)
Si 0.05 ± 0.01 (n = 4) 0.04 ± 0.02 (n = 4) 0.16 ± 0.09 (n = 3)
Si + Au 0.07 ± 0.04 (n = 4) 0.04 ± 0.01 (n = 4) 0.18 ± 0.11 (n = 3)
Si + Au + ZnO urchin2 16.4 ± 2.0 (n = 3) 23.4 ± 2.5 (n = 3) 13.8 ± 3.9 (n = 3)
Si + Au + ZnO urchin2 + PVDF-HFP NA NA 6.9 ± 1.5 (n = 2)
Plain Zn disc (positive control) NA NA 25.4 ± 5.3 (n = 4)
  1. There were no cells in the negative control to account for the Zn content in the cell medium and in the culture wells
  2. Abbreviations: NA data not available, SD standard deviation, n number of analysed data