Fig. 5From: Assessing an effective feeding strategy to optimize crude glycerol utilization as sustainable carbon source for lipid accumulation in oleaginous yeastsTime dependence of fatty acid production by Fourier transform infrared (FTIR) microspectroscopy analysis. Time dependence of the CHx stretching band area (a) and of the ester C = O (b) of S. cerevisiae (filled diamond), R. toruloides (filled square), C. curvatus (filled circle) and L. starkeyi (filled triangle) cells growing on pure (dashed lines) and crude glycerol (continuous lines). Values were normalized for the total protein content given by the amide I band areaBack to article page