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. 2017 Nov 20;8:1997. doi: 10.3389/fpls.2017.01997

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Copyright © 2017 Fan, Zheng, Bai, Saroussi and Grossman.

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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Flocculation efficiency and charge characteristics (Zeta potential) as a function of pH in three Chlamydomonas reinhardtii strains. (A) flocculation efficiency; (B) zeta potential. Sometimes the data points are not aligned, as it is quite difficult to adjust the same pH values in the solution for each strain. The data was analyzed for significant differences using the Student’s t-test (n = 3) (all mutants in comparison with the two wild-types). Asterisks indicate a significant difference from the control (^∗p < 0.05, ^∗∗p < 0.01).