11. Thus, most toxicants can be considered narcotics. 12. Uncouplers of oxidative phosphorylation are specifically acting toxicants . 13. Several different assays are performed to quantify concentrations of these toxicants in fish tissues. 14. There is general agreement that e-cigarettes expose users to fewer toxicants than tobacco. 15. Multiple tolerances can elevate an individual s ability to tolerate several toxicants present at once. 16. Toxicants can alter an organism s tissues.17. The transfer of toxicants through lactation is driven by the log Kow of the toxicants. 18. The transfer of toxicants through lactation is driven by the log Kow of the toxicants . 19. We ought not to give up the vigilance that environmental toxicants might be affecting human health, 20. David Ashley is the chief of the CDC's emergency response and air toxicants branch.