Table 1: Substances tested in duplicate on E. coli and P. putida.

EntrySubstanceAmountInhibited cell growth

13100 mgNo
23 + Novobiocin 100 mg + 50 mgNo
33 + Novobiocin 50 mg + 50 mgNo
44100 mgNo
54 + Novobiocin 100 mg + 50 mgNo
64 + Novobiocin 50 mg + 50 mgNo
7Novobiocin50 mgNo
8Polymyxin B300 unitsYes
9Tetracycline30 mgYes
10H2O10 mgNo

Discs pretreated with antibiotic from Oxoid.