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The surface of magnetic NiFe 2 O 4 nanorods prepared via a novel rapid combustion process was modified by sodium silicate and glutaraldehyde, and the penicillin G acylase (PGA) was successfully immobilized on the surface-modified magnetic NiFe 2 O 4 nanorods. The properties of immobilized PGA were investigated, and the results showed that the immobilized PGA with high effective activity, good stability of enzyme catalyst, and good reusability was less affected by pH and temperature than freedoi:10.15255/cabeq.2015.2319 fatcat:kgwf5jsv3vcy7dpbare6yow2ae