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. 2021 Aug 2;12:699344. doi: 10.3389/fphys.2021.699344

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Copyright © 2021 Zheng, Kang, Xing, Zheng, Wang and Zhou.

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) and the copyright owner(s) 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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The ROS stained with dihydroethidium imaged by fluorescence microscope. (n = 3, original magnification, 20) (A) sham group; (B) control group; (C) O₂ group; (D) H₂ group; (E) the ROS levels in lung grafts. The ROS level in the control group was higher than the sham group (P < 0.05), the ROS levels in the O₂ and H₂ group were lower than the control group (P < 0.05), the H₂ group was lower than the O₂ group (P < 0.05). ^∗P < 0.05 vs. sham group; ^#P < 0.05 vs. control group; ^△P < 0.05 vs. O₂ group.