Fig. 6.
Removal of volatile benzene from air. Cuttings of null vector control plants and transformed poplar CYP2E1-78 were placed in hydroponic solution, incubated in desiccators, and exposed to volatile benzene with an initial concentration of ≈40,000 μg·m−3. Benzene concentration in the air was analyzed daily by GC–flame ionization detector and quantified compared with external standards. Each line represents an individual cutting in a desiccator system. Data points are averages of triplicate daily samples with error bars indicating ± 1 SEM.