The activity of lactic dehydrogenase in the tissue culture medium was measured by a LDH kit.

LDH was successfully immobilized on Au colloid associated with a cysteamine monolayer on a gold electrode surface to construct a nanometer-sized bionic function interface.

The LDH liposome was prepared by the reverse-phase evaporation and ultrasound method, the carbopol was added as a support base for the preparation of the liposomeal gel.