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Table 5 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
10 255 ± 13 158 ± 7 18 ± 7 10 111 ± 9 81 ± 10 6 ± 2
50 194 ± 11 65 ± 9 3 ± 1 50 43 ± 13 26 ± 8 0
100 95 ± 9 10 ± 6 0 100 4 ± 1 3 ± 2 0
200 93 ± 13 0 0 200 0 0 0
300 53 ± 10 0 0 300 0 0 0
  1. Measured by treating smaller GO sheets and GO-based materials (up to 10 μm wide) with B. subtilis. 10–300 μg mL−1 of materials were treated with B. subtilis. 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)