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Effect of incubation temperature on nitrate reduction by a pure culture isolate Geobacillus sp. TK004, obtained from IW1\_14. Data are averages for duplicate incubations; standard deviations are shown. The medium contained 3 mM VFA and 10 mM nitrate. 30°C (A), 40°C (B), 50°C (C), 60°C (D), and 70°C (E).
