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. 2018 Aug 10;9:1844. doi: 10.3389/fmicb.2018.01844

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Copyright © 2018 O’Donnell, Rea, Shanahan and Ross.

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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Machine parameters logged over the first 20–40 min of the fermentation (A–C) and over the full 24 h fermentation period (D). (A) Percentage dissolved oxygen (DO%) (B) Temperature (C) pH (D) Liquid NaOH addition.