Fig. 1From: A multi-component reaction for covalent immobilization of lipases on amine-functionalized magnetic nanoparticles: production of biodiesel from waste cooking oilXRD patterns of a silica core–shell magnetic nanoparticles (Fe3O4@SiO2); b amine-functionalized magnetic nanoparticles (MNPs-NH2); and c MNPs-TLLBack to article page