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Ammonia inhibition of methanogenesis by resting M. thermophila PT cells. Early stationary phase cultures of M. thermophila PT grown on 40 mM acetate were flushed with N2/CO2 (80:20 [v/v]) gas and supplemented with 40 mM acetate and NH4Cl, followed by an incubation at 55°C. Data are presented as the means of three independent cultures, and error bars represent standard deviations.
