Fig. 8

(a) ¹ H-¹ H TOCSY spectrum acquired on the organic phase obtained after basic hydrolysis of the biosurfactants. (b) Superimposition of the zoom of the ¹ H-¹ H TOCSY spectrum of biosurfactants (black) with ¹ H-¹ H TOCSY spectra of oleic acid (green) and 16-hydroxypalmitic acid (red) deposited in the BMRB. Dashed lines indicate typical cross peaks patterns of vinylic, allylic, and hydrocarbon chains (…) and of hydroxylated fatty acids (_._). All the spectra were recorded at 25 °C