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Survival of E. coli K12 on different copper surfaces. Approximately 2 × 108 bacteria were applied to different copper surfaces and survival was assessed after different times of incubation as described under Materials and Methods. ○, Polycarbonate; ▪, rolled copper; •, electrodeposited copper; □, polished copper. Measurements were carried out in triplicates and the error bars indicate standard deviations.
