Fig. 9. Effects of xenon (Xe) on microglial activation after intracerebral hemorrhage. Microglial activation (F4/80 positive cells) was stereologically assessed in the hippocampus 7 days after intrastriatal collagenase injection. A , Individual (open circles ) and mean values (horizontal line ) for the 0 and 30% Xe groups. B , Representative F4/80 immunohistochemistry in mouse not treated with xenon. C , Representative F4/80 immunohistochemistry in mouse treated with 30% Xe for 20 h.