Cover: Scanning electron micrographs of bronchial epithelial cultures exposed to air (a) or O₃ at 0.5 ppm (b) for 6 h and allowed to recover for 6 h prior to sample processing. Ozone exposure caused cilia damagenote the shorter and less dense cilia compared with air-exposed culturesand cell detachment in the upper layer of cells that is apparent as cell sloughing (arrows). Bar = 10 µm. For further information, see the article by Jabbour and colleagues 357.
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