[Activity of ethambutol, isoniazid and rifampicin on Corynebacterium urealyticum and Corynebacterium jeikeium].

Because corynebacteria and mycobacteria have walls of similar composition, it was of interest to test the effects on resistant corynebacteria of two agents with anti-wall effects, i.e., ethambutol (EMB) and isoniazid (INH).

Induction by antimycin A of cyanide-resistant respiration in heterotrophic Euglena gracilis: Effects of growth, respiration and protein biosynthesis.

The addition of antimycin A during the logarithmic phase of growth of heterotrophic Euglena gracilis cultures (in lactate or glucose medium) was immediately followed by decreased respiration and a cessation of grwoth. Induced cyanideresistent respiration appeared 5 h after the addition of the inhibitor then the cells started to grow again and could be cultured in the presence of antimycin A. Thus the cells exhibited a cyanide-and antimycin-resistant respiration which was, in addition, sensitive to salicylhydroxamic acid and propylgallate.