tests with 140 strains representing escherichia coli , klebsiella aerogenes , k. ozaenae , proteus mirabilis , p. vulgaris , p. rettgeri and p. morganii in a defined medium supplemented with 0-09m dimethylamine ( dma ) and 0-1m potassium nitrate showed that at least 89 % of the 136 strains able to reduce nitrates produced up to 9mm dimethylnitrosamine ( dmn ) in 70h at 37 degrees c .
C0071772
potassium
C0028125
nitrates