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Determination of MIC values for TiO2 and Ag+ against S. aureus. (a) Control. (b) Groups treated with TiO2:0.1, 0.2, 0.4, 0.8 or 1.6 mg ml−1 from left to right. (c) Groups treated with Ag+: 0.723, 1.445, 2.891, 5.781 or 11.560 µg ml−1 from left to right.
