Abstract:Enzymes catalyzing ammonium (NH 4 + )/nitrate (NO 3 -) into nitrous oxide (N 2 O)/molecular nitrogen (N 2 ), play critical roles in water quality management. The objective of this paper was to investigate the role of extra-cellular enzymes in cycling of nitrogen (N) in aquatic systems. It appears that N in estuaries, salt marshes, etc., does not stay long enough to be available for uptake, thus, creating N limited conditions. This study showed that indigenous extra-cellular nitrate reductase along with others … Show more
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