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. 2019 May 6;9:61. doi: 10.1186/s13568-019-0784-7

Fig. 1.

Fig. 1

The four full factorial designs used to optimize rhamnolipid production. The rhamnolipid yield is expressed as rhamnose equivalents. a Factorial design 1 (Canola Oil/(NH4)2SO4); b Factorial design 2 (Waste canola Oil/(NH4)2SO4); c Factorial design 3 (Canola Oil/(NaNO3); d Factorial design 4 (Waste canola Oil/(NaNO3). Treatments that do not share a letter are significantly different (p < 0.05)