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Fig. 4. Examples of traces of carbon dioxide release
(
CO2, 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.)