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. 2022 Sep 2;53(4):2015–2025. doi: 10.1007/s42770-022-00811-4

Fig. 6.

Fig. 6

E24 index values as a measure of stability of biosurfactant produced by Bacillus sp. WD22 under different conditions of pH (A), temperature (B) and NaCl (g/100 mL) (C)