1.7.1.2 analysis detailed protocol for measuring relative nitrate reductase enzyme activity of tomato crude extracts. Product nitrite is converted to a water soluble red azo dye using sulfanilic acid and N-(1-naphthyl)ethylenediamine 1.7.1.2 analysis enzymatic reduction as a method for NO3- determination in expired breath condensate as a way of monitoring inflammation and oxidative stress in the lungs 1.7.1.2 environmental protection hexahydro-1,3,5-trinitro-1,3,5-triazine is widely used for military and commercial purposes due to its high explosive properties. Hexahydro-1,3,5-trinitro-1,3,5-triazine and its degradation products are toxic, mutagenic and carcinogenic to humans and other biological systems. The biotransformation of hexahydro-1,3,5-trinitro-1,3,5-triazine by NAD(P)H nitrate reductase from Aspergillus niger under anaerobic conditions 1.7.1.2 analysis measuring in vitro nitrate reductase activity of assimilatory nitrate reductase enzymes from Mycolicibacterium smegmatis crude extract using both physiological and non-physiological electron donors. Product nitrite is converted to a water soluble red azo dye using sulfanilic acid and N-(1-naphthyl)ethylenediamine 1.7.1.2 analysis the amperometric nitrate reductase-phenosafranin bioelectrode is very convenient for the determination of nitrate in river water