the brain vascular perfusion method , with a multiple-time brain uptake analysis , has been employed to study the effects of chronic amphetamine intoxication on the kinetics of entry of 2 inert polar molecules , d- [ 14c ] mannitol ( mol.wt . 180 ) and [ 3h ] polyethylene glycol ( peg , mol.wt . 4000 ) into the forebrain of the guinea pig .
C0006104
brain
C0085140
forebrain