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. Author manuscript; available in PMC: 2020 Dec 1.
Published in final edited form as: Regul Toxicol Pharmacol. 2019 Oct 17;109:104500. doi: 10.1016/j.yrtph.2019.104500

Figure 3.

Figure 3.

Effect of resistance values on ROS levels in e-cig vapor. Fresh air control and e-cig vapor were pulsed through DCFH-HRP ROS indicator solution in (A, B) phosphate buffer and (C, D) cell culture media in (A, C) vapor condensate and (B, D) the ALI during a 7.50 min exposure. Data represent mean ± SD of six independent replicates.

**p<0.01; ***p<0.0002 significant results between 1.5 Ω/0.25 Ω groups and control group using one-way ANOVA (Tukey’s multiple comparison test).

°p<0.05; °°p<0.01 significant results between 0.25 Ω and 1.5 Ω group using one-way ANOVA (Tukey’s multiple comparison test).