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. 2020 Jul 31;15(7):e0236591. doi: 10.1371/journal.pone.0236591

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© 2020 McFarlanE et al

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 9 — (a) Variation in relative ion count for positive matrices from mean of matrices at t = 0. Bars show standard error. Correlation of mean ion count with time: Spearman ρ0.94, p = 0.017; correlation of all points with time: Spearman ρ0.25, p = 0.009. Plateau phase seen between 12 and 48 hours. (b) Variation in relative ion count for negative matrices from mean of matrices at t = 0. Bars show standard error. Correlation of mean ion count with time: Spearman ρ0.94, p = 0.017; correlation of all points with time: Spearman ρ0.27, p = 0.004. Plateau phase seen between 12 and 48 hours.