Fig. 4
From: Copper-containing glass ceramic with high antimicrobial efficacy
Bacterial reduction kinetics on paint coupons containing copper glass ceramic particles. Plot of S. aureus reduction as a function of exposure time shows a steady decrease in S. aureus colony counts over 2.5 h, at which point bacterial colonies reduced down to limit of detection. EPA-prescribed 3-log kill (99.9% reduction) was observed in about 1 h. Data and error bars represent mean and standard deviation from two experiments with samples in triplicate. The inset table showcases the high bactericidal efficacy of copper–glass ceramic particles against S. aureus, P. aeruginosa, E. coli and K. aerogenes. ≥4-log kill (≥99.99% reduction) was measured against all bacteria following 2-h exposure to test coupons. Bacterial growth on each test and control coupon was measured in triplicate—data shown are geometric mean of values
