Variables: dissolved_oygen electric_conductivity Substances: 1-(3-Trifluoromethylphenyl)-piperazine (KKIMDKMETPPURN-UHFFFAOYSA-N) 2 -2 -Difluorodeoxyuridin (FIRDBEQIJQERSE-QPPQHZFASA-N) Acetochlor (VTNQPKFIQCLBDU-UHFFFAOYSA-N)