by their effect on conductivity , the investigated cephalosporins could be divided into three groups : those having no effect on conductivity at the maximum concentrations ( up to 1 mg/ml ) i.e . cefoperazone , cefotaxime and ceftizoxime , those having an effect on conductivity at concentrations of 0.2 to 0.5 mg/ml i.e . cephalexin and cephalothin and those having a significant effect on conductivity at concentrations of 10 to 60 micrograms/ml i.e .
C3536856
cephalosporins
C0007560
ceftizoxime