Fig. 2From: The synthesis of biodiesel catalyzed by Mucor miehei lipase immobilized onto aminated polyethersulfone membranesThe SEM images of PESNH2-10 D2 P5 at 20,000 times magnification. a Without immobilized lipase; and b with the presence of immobilized lipase. The yellow circle indicates a DBP particle, while the orange circle indicated as the lipase immobilized onto the membraneBack to article page