“…The three methods described above were used to measure free radicals and ROS/RNS production in human granulocytes (3,7,9), detached nerve terminals (synaptosomes; 12, Myhre & Fonnum, unpublished results), and cultured cerebellar granule cells (Dreiem & Fonnum, unpublished results, Myhre & Fonnum, unpublished results). The biological preparations were exposed to organic hydrocarbon solvents or to the environmental toxicants, polychlorinated biphenyls (PCBs).…”