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. 2019 Jan 14;9:3348. doi: 10.3389/fmicb.2018.03348

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Copyright © 2019 Abbas, Rafatullah, Khan and Siddiqui.

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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Nyquist plots for open and closed SMFCs anodes (A) and cathodes (B). The overall frequency range from 10 kHz to 10 MHz shown in the inset graphs.