Fig. 5From: Evaluation of fluorinated hydroxyapatite nanoparticles as an antibacterial material for catheter coatingSurvival ratio of P. aeruginosa in contact with each sample powder (50 mg/0.2 mL) of a NHAp, b F(30)-HAp, c F(50)-HAp, and d F(100)-HAp. Error bars show ±SD (n = 4), and single and double asterisks mean p < 0.05 and p < 0.01, respectively, by unpaired Student’s t testBack to article page