Production and consumption of nitric oxide by denitrifying bacteria under anaerobic and aerobic conditions

Production of nitric oxide in loam under aerobic and anaerobic conditions.

Measurements of gas flow through soil columns of loam from Kjettslinge, Uppland, Sweden, gave average NO production rates of 0.06 +/- 0.01 ng of NO N g of soil min in aerobic conditions and 3.7 +/- 0.6 ng of NO N g of soil min in anaerobic conditions at 25 degrees C. Approximately 30% of the NO(3) loss in anaerobic conditions was as NO. In aerobic conditions an equilibrium concentration for NO ...

Siderophore production by Pseudomonas stutzeri under aerobic and anaerobic conditions.

The siderophore production of the facultative anaerobe Pseudomonas stutzeri, strain CCUG 36651, grown under both aerobic and anaerobic conditions, was investigated by liquid chromatography and mass spectrometry. The bacterial strain has been isolated at a 626-m depth at the Aspö Hard Rock Laboratory, where experiments concerning the geological disposal of nuclear waste are performed. In bacteri...

Nitrous oxide production by Alcaligenes faecalis under transient and dynamic aerobic and anaerobic conditions.

Nitrous oxide can be a harmful by-product in nitrogen removal from wastewater. Since wastewater treatment systems operate under different aeration regimens, the influence of different oxygen concentrations and oxygen fluctuations on denitrification was studied. Continuous cultures of Alcaligenes faecalis TUD produced N2O under anaerobic as well as aerobic conditions. Below a dissolved oxygen co...

Antibacterial Action of Nitric Oxide-Releasing Chitosan Oligosaccharides against Pseudomonas aeruginosa under Aerobic and Anaerobic Conditions.

Chitosan oligosaccharides were modified with N-diazeniumdiolates to yield biocompatible nitric oxide (NO) donor scaffolds. The minimum bactericidal concentrations and MICs of the NO donors against Pseudomonas aeruginosa were compared under aerobic and anaerobic conditions. Differential antibacterial activities were primarily the result of NO scavenging by oxygen under aerobic environments and n...

Low Levels of Nitrous Oxide Aerobic Denitrifying Bacteria That Produce