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. 2017 Aug 7;7(5):278. doi: 10.1007/s13205-017-0902-7

Fig. 1.

Fig. 1

Effect of different physiochemical parameters biosurfactant production by bacterial strains P. stutzeri NA3 and A. baumannii MN3. a pH, b temperature, c carbon sources, d nitrogen sources, e carbon concentration, f nitrogen concentration. Vertical bars represent the standard error of the mean based on the three independent tests