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. 2020 Jul 7;8:548. doi: 10.3389/fchem.2020.00548

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Copyright © 2020 Hou, Zhao, Chen, Li, Lin, Chen, Zhu, Wu, Lian, Huang and Li.

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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(A) Frequencies recorded at QCM when different concentrations of B. bifidum introduced using polyclonal antibody immobilized sensor, mouse monoclonal antibody immobilized sensor, and mouse IgG antibody immobilized sensor. Plots of Frequency vs. concentrations of B. bifidum using (B) polyclonal antibody immobilized sensor and (C) mouse monoclonal antibody immobilized sensor.