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. 2015 Jul 21;6:726. doi: 10.3389/fmicb.2015.00726

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Copyright © 2015 Nielsen, Revsbech and Kühl.

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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(A) Concentration profiles of H₂ in a hypersaline microbial mat as a function of time after darkening. (B) Concentration profiles of H₂ and O₂ measured after 15 min darkness. The mat sample was incubated 2.5 h under a photon irradiance of 1800 μmol photons m^-2 s^-1 prior to darkening.