in in vivo and in vitro experiments the effects of some heavy metal salts ( cu , co , cd , pb , ni , zn , hg , as , bi and sn ) on rat liver and brain mitochondrial monoamine oxidase ( mao ) activity was studied using three different substrates ( tyramine , 5-hydroxytryptamine ( 5-ht ) and beta-phenylethylamine ( 2-pea ) .
C0347988
heavy metal
C0025424
hg