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. 2019 Mar 27;10:445. doi: 10.3389/fmicb.2019.00445

FIGURE 1.

FIGURE 1

Response surfaces and corresponding contours of cellulase production in terms of interaction between two parameters. (A) Yeast extract (g/L) and medium volume (mL). (B) Yeast extract (g/L) and initial pH. (C) Medium volume (mL) and initial pH.