turbidometry studies have shown that 3 h after the inactivation of amoxicillin by penicillinase , there was a longer effect for 1 micrograms/ml following beta-lactamase ( 12 h 31 min +/- 2 h 09 min ) than for 10 micrograms/ml ( 7 h 0 min +/- 1 h 12 min ) or 100 micrograms/ml ( 5 h 22 min +/- 0 h 52 min ) .
C0030841
penicillinase
C0597979
beta-lactamase