Figure 1From: Effects of particulate matter on the pulmonary and vascular system: time course in spontaneously hypertensive rats Neutrophil numbers in BALF measured 24 and 48 hours after exposure. SH rats were exposed to saline or particulate matter (motorway tunnel dust (RTD) or EHC-93) by a single intratracheal instillation. Values are shown as means ± SEM, N = 8–10 and *P < 0.05 significantly different from saline control.Back to article page