Fig. 6From: Aspergillus caespitosus ASEF14, an oleaginous fungus as a potential candidate for biodiesel production using sago processing wastewater (SWW)Second derivative analyses of A. caespitosus ASEF14 lipid samples. a The second derivative spectra are reported between 3050 and 2800 cm–1 wavelength range and b 1500–1350 cm–1, after normalization. The arrows represent increasing intensitiesBack to article page