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Figure 4


Fig. 4. Examples of traces of carbon dioxide release (Formula 1CO2, green) and intratracheal pressure (Ptr, red) under experimental conditions in which discontinuous gas exchange (DGE) was not maintained. Hypoxia and hypercapnia experiments during control (A,C) and treatment (B,D) conditions in Samia cynthia. (For full details of conditions during control and treatment periods see Materials and methods.)