Role of oxidative stress on diesel-enhanced influenza infection in mice

Table 1 Summary of concentrations and characteristics of the diesel exhaust particles and gases within the animal exposure chambers.^a

*Constituent*	*Units*	*Exposure*
Particle mass concentration (TEOM)	μg/m³	500 ± 9
Particle mass concentration (filter)^b	μg/m³	701 ± 16
Particle number concentration^c	#/cm³	1.0 × 10⁸ ± 4.7 × 10⁶
Oxygen (O₂)	%	19.7 ± 0.5
Carbon monoxide (CO)	ppm	12.0 ± 1.0
Nitrogen oxides (NO_x)	ppm	17.6 ± 0.7
Sulfur dioxide (SO₂)	ppm	>3.0
Number median D_p^d	nm	53 ± 2
Volume median D_p^d	nm	194 ± 2
OC/EC^e	wt ratio	1.1 ± 0.1

^aThese data represent averaged results from the two repeat studies performed from 8/1-13/06 (13 days), 10/2-14/07 (13 days), and NAC study 2/11-19/08 (9 days). Tapered element oscillating microbalance (TEOM), O₂, CO, and NO_x data represent mean values from continuous measurements taken over all 35 exposure days ± SE.
^bFilter data represent mean values from one measurement per day taken over 34 days of exposure ± SE.
^cParticle number concentration data represent a mean value from 13 days of exposure ± SE.
^dD_p indicates particle geometric number and volume median diameters for 13 days of particle size distribution measurements ± geometric standard deviation. Note that volume information is calculated from number based mobility diameters and assume spherical particles.
^eOC/EC (organic carbon to elemental carbon ratio) data represent mean values from one measurement per day taken over 13 days of exposure ± SE.

ISSN: 1743-8977