Figure 5From: Contamination of nanoparticles by endotoxin: evaluation of different test methods Response ratio of TLR4 reporter cells when applied with particles. The response ratio of TLR4 reporter cells after exposure to increasing concentration of particles (0, 12.5, 50 and 200 μg/ml) (grey line), spiked (0.3 EU/ml) particles (green line) and spiked particles + endotoxin inhibitor (polymyxin B sulfate, 100 μg/ml) (red line). A: TiO2 particles (non-baked and baked); B: CaCO3 particles (non-baked and baked); C: Ag particles (non-baked and baked); D: SiO2 particles (non-baked).Back to article page