to determine if inorganic nitrate pollutants cause increased airway reactivity in humans , 10 normal volunteers and 11 mild asthmatics inhaled a sodium nitrate ( nano3 ) aerosol with an aerodynamic diameter of 0.46 micron at a concentration of 7,000 microgram/m3 , a level 100 -- 1,000 times greater than reported urban levels for nitrates .
C0074748
sodium nitrate
C0028125
nitrates