Fig. 2. Representative brains of 14-day-old rats with various treatments.  HI = 7-day-old rats had left common carotid arterial ligation plus hypoxia with 8% oxygen for 2.5 h;  Iso = 1.5% isoflurane for 30 min at 24 h before the hypoxia/ischemia;  AG = aminoguanidine (200 mg/kg) administered 24 h before the hypoxia/ischemia or 30 min before the isoflurane.