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. 2021 Aug 5;12:695571. doi: 10.3389/fmicb.2021.695571

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Copyright © 2021 Chen, Chen, Zheng, Chen, He, Lin, Chen, Chen and Xue.

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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Three-dimensional response surface and two-dimensional contour plot showing effects between liquid volume and COS (A,B), peptone and COS (C,D), and liquid volume and peptone (E,F) on COSE activity.