Fig. 5
Relative growth rate of Escherichia coli (a) and Staphylococcus aureus (b) after 6-h incubation in different concentrations (0.01, 0.05, 0.5 and 1 g/l) of PNIPAAm (red circles), Fe3O4-PNIPAAm-1 (orange diamonds [1]), Fe3O4-PNIPAAm-2 (green triangles [2]) and Fe3O4-PNIPAAm-3 (blue triangles [3]). The error bars show SD calculated from n = 3. Significance level ***P < 0.001