Abstract:
Magnetite nanoparticles were prepared by reacting ferrous and ferric salts in presence of aqueous ammonia.The magnetic nanoparticles (MNPs) were amino functionalized by treating with 3-aminopropyl
triethoxy silane (APTES) and was coupled with glutaraldehyde. A novel solvent tolerant esterase from Pseudozyma sp. NII 08165 was immobilized on the MNPs through covalent bonding to the glutaraldehyde.
The magnetite nanoparticles had a size range of 10–100 nm, confirmed by DLS. Lipases immobilized on MNPs were evaluated for biotransformation reactions including synthesis of ethyl acetate and transesterification of vegetable oil for producing biodiesel. The MNP immobilized esterase had prolonged shelf life
and there was no loss in enzyme activity.
