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. 2017 Sep 29;4:162. doi: 10.3389/fvets.2017.00162

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Copyright © 2017 Santangelo, Robin, Simpson, Potier, Guichardant and Portier.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Schematics of a modified Tafonius machine. Xenon was directly taken from a 428-L xenon cylinder connected to a 50-L min⁻¹ flow meter and then delivered by a pipe into the bottom of the machine cylinder. A xenon analyzer was connected to the expired limb and sampled expired gases were re-introduced into the bottom of the machine cylinder.