Figure 4From: Metal rich particulate matter impairs acetylcholine-mediated vasorelaxation of microvessels in miceTotal NO Measurement in Serum. Serum was collected from mice aspirated with either a single (1X) or a repeated aspirations (6X) with (25 μg = 0.5 mg/ml). *indicates a significant difference between the exposure and control group as determined by one-way Student t-Test (*p < 0.05; **p < 0.01; n = 6/grp).Back to article page