Fig. 3From: A synergistic bactericidal effect of low-frequency and low-intensity ultrasound combined with levofloxacin-loaded PLGA nanoparticles on M. smegmatis in macrophagesIn vitro release profile of the LEV from LEV-NPs with ultrasound and without ultrasound treatment. The experiments were performed in triplicate; mean ± SD are shown. **P < 0.01 compared with those without ultrasonic treatmentBack to article page