Fig. 5From: The synthesis of biodiesel catalyzed by Mucor miehei lipase immobilized onto aminated polyethersulfone membranesThe FTIR spectra of PES-\(\mathrm{NH}_2\) (blue line); PES-\(\mathrm{NH}_2\) after immobilization (green line); and PES-\(\mathrm{NH}_2\) after immobilization and cross-linking reaction (red line)Back to article page