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Influence of temperature on the degradation of selected β-lactams (24 h of incubation) at the maximum concentration tested as follows: 12.8% piperacillin (○), 5% cefepime (▵), 6.4% meropenem (▪), and 0.8% imipenem plus cilastatin (□). All values are the means of three independent determinations ± the SD (symbols without bars indicate values for which the SD is smaller than the symbol size).
