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Time kill curves of undoped phosphate glass (UPG) and 5 mol % cobalt, zinc, and copper oxide-doped phosphate glass powders at 5 mg/mL against E. coli. The combinations investigated were Co + Cu, Co + Zn, and Cu + Zn. Microbial viability is presented as log cfu/mL. Data shown are expressed as mean ± SD (N = 3).
