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Table 4 Bacterial viability

From: Graphene oxide conjugated with polymers: a study of culture condition to determine whether a bacterial growth stimulant or an antimicrobial agent?

Incubate with nutrient medium Incubate with PBS buffer
Concentration (μg/mL) Viability (%) with treatment of GO Viability (%) with treatment of GO-POAA Viability (%) with treatment of GO-chitosan Concentration (μg/mL) Viability (%) with treatment of GO Viability (%) with treatment of GO-POAA Viability (%) with treatment of GO-chitosan
10 208 ± 13 137 ± 11 43 ± 9 10 110 ± 13 93 ± 10 10 ± 5
50 161 ± 12 95 ± 10 13 ± 4 50 68 ± 8 38 ± 6 0
100 107 ± 12 22 ± 7 0 100 19 ± 7 12 ± 6 0
200 85 ± 8 6 ± 3 0 200 0 4 ± 3 0
300 66 ± 7 3 ± 1 0 300 0 0 0
  1. Measured by treating smaller GO sheets and GO-based materials (up to 10 μm wide) with E. coli. 10–300 μg mL−1 of materials were treated with E. coli. After 3 h incubation with nutrient medium or PBS, respectively, the CFU counting method was used. The number of surviving bacteria was determined and is expressed as a percentage (%) that corresponds to the unit of CFU mL−1. Data are mean ± SD (n = 6)