products such as nitric acid, ammonium nitrate and nitrogen solutions.
And do patterns of uptake change in mixed versus single nitrogen solutions?
Nitrogen solutions were elevated to approximately double atmospheric abundance of N (0.73% N) while the second type of nitrogen remained at the atmospheric concentration of N (0.37% N).
The masses of glucose and nitrogen solutions added into the fermentor were estimated online by weighing the feeding tanks continuously (CPA16001S, Sartorius (Goettingen, Germany).
Nitrogen solutions were not autoclaved but were filter sterilized through a 0.22 μm MF-Millipore MCE Membrane (Milex, Billerica, Massachusetts, USA), and added to the cooled sterile media within the laminar flow hood.
This method takes advantage of the formation of the ferromagnetic supersaturated nitrogen solid solution γN phase (i.e., expanded austenite) upon nitriding at moderate temperatures.
Ion beam nitriding of an austenitic stainless steel (ASS) at moderate temperatures (∼400 °C) produces a supersaturated nitrogen solid solution that has beneficial effects on the mechanical properties.
The results indicate that the supersaturated nitrogen solid solution is based on γ′-Fe4N and nitrogen atoms supersaturated in γ′-Fe4N are in form of the clustered Cr N.
Nitrogen fertilizer solution was prepared by mixing specified amount of urea with distilled water.
