Nitrite-producing Activity of the Human Mouth

We measured the intraoral nitrite-producing activity in 100 healthy adults by the “NO3--solution method” and the “NO3--filter paper method” in order to investigate the variations of nitrite-producing activity with age and sex. A fairly high positive correlation (r=0.636, P<0.01) was found between the values obtained by the two methods.The geometric mean values (95% confidence limits) of nitrite-producing activity in males and females obtained by...