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Table 1 Comparison of ambient levels of particles (PM) and NOx to levels used by Crüts et al.

From: Comment on the Nanoparticle Conclusions in Crüts et al. (2008), "Exposure to diesel exhaust induces changes in EEG in human volunteers"

 

McCreanor et al.[5]

Crüts et al.[1]

PM 2.5

28 μg/m3

300 μg/m3

Particle #

640,000 particles/cm3

1,200,000 particles/cm3

NO 2

80 ppb

1,600 ppb