Biomarkers - metabolism, Air Pollutants - analysis, Environmental Monitoring, Mercury - analysis, Risk Assessment, Food Contamination, Proto-Oncogene Proteins c-jun - genetics, Rats, RNA, Messenger - metabolism, Reverse Transcriptase Polymerase Chain Reaction, Soil Pollutants - analysis, Soil Pollutants - toxicity, Brain - drug effects, Brain - metabolism, F...