pfas per- and poly-fluoroalkyl substances - 3d molecule conformer - vertical

pfas fluorinated chemicals health effects polyfluoroalkyl substances 3d molecule water contamination carbon render rendering 4k air pollution alkyl chain atom chemical chemours compounds concept conformer cosmetics dupont firefighting foam flame retardants fluorine atoms fluorocarbons food packaging forever genx graphic group methyl methylene military moiety nonstick cookware organofluorine perfluoroalkyl personal care products pfass pfcs pfoa sign soil stainmaster synthetic