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Cross-sectioned representation of the in vitro exposure chamber. The exposure chamber delivers the dry particles to lung cells directly by low air flow (10 mL/min). The in vitro exposure model for particle-bound PBDEs consists of silica particles coated with individual PBDE congeners (BDEs 35, 47, and 99) and a dry powder sprayer connected to a delay chamber and an exposure chamber holding Transwell® inserts.
