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. 2010 Jul 16;182(11):1398–1409. doi: 10.1164/rccm.201002-0185OC

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Figure 6. — Effects of apical exposure to 22 μg/ml zinc oxide (ZnO) nanoparticles (NPs) on R_T of minimal defined serum-free medium (MDSF) (A)- or MDSF supplemented with 10% newborn bovine serum (MDS) (B)-grown rat alveolar epithelial cell monolayers (RAECMs) in the presence or absence of 100 μM diethylenetriaminepentacetic acid (DTPA) after 24 hours (n = 3). R_T of MDSF- and MDS-grown RAECMs before 100 μM DTPA exposure was 2.23 (±0.73) kΩcm² (n = 6) and 2.72 (±0.14) kΩcm² (n = 9), respectively. *Significantly different (P < 0.05) from control (RAECMs not exposed to DTPA).