Gaseous NO2 as a regulator for ammonia oxidation of Nitrosomonas eutropha.
作者： Ingo Schmidt , Dirk Zart , Eberhard Bock
关键词: Ammonium 、 Energy source 、 Chemistry 、 Nitrosomonas eutropha 、 Nitrosomonas 、 Nitrite 、 Ammonia 、 Inorganic chemistry 、 Denitrifying bacteria 、 Nitrification
摘要: Cells of Nitrosomonas eutropha strain N904 that were denitrifying under anoxic conditions with hydrogen as electron donor and nitrite acceptor unable to utilize ammonium (ammonia) an energy source. The recovery ammonia oxidation activity was dependent on the presence NO2. Anaerobic observed in a helium atmosphere supplemented 25 ppm NO2 after 20 h. Ammonia detected 2-3 days using oxic In contrast, consumption started 8-9 without addition NO2; this case, small amounts NO their concentrations increased increasing activities. Hardly any when nitrogen oxides removed by intensive aeration. It would seem, therefore, is master regulatory signal for eutropha. inhibited NO. This inhibition partly compensated either concentration or 2,3-dimercapto-1-propane-sulfonic acid binding substrate. DMPS inhibitory nitrification conditions, while led
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