Fig. 4
From: Evaluation of the genotoxicity of PM2.5 collected by a high-volume air sampler with impactor
Typical dose–response curves of mutation assay for PM2.5 in Tsukuba in (a) 30th July, 2012 and (b) 8th August, 2012.a: Results of typical positive mutagenicity. b: Results of negative, false-positive and positive mutagenicity. TA100 S9mix- and TA98 S9mix + were negative, TA100 S9mix + was false-positive and TA98 S9mix- was positive