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Langmuir-Blodgett (LB) membrane: Synthetic composite membrane formed by sequential depositing of one or more monolayers of surface-active component onto a porous or nonporous support.

Limiting current density: Current density at which dramatic increases in resistance are observed in an ion exchange membrane system under the influence of an applied electric field between the upstream and downstream.

Lipid membrane: see Biological membrane.

Liquid emulsion membrane: A liquid layer that is immiscible with the solution to be separated and exists as a simple or inverted emulsion.

Liquid immobilized (impregnated) membrane: Liquid membrane that fills the opened pores of a support and serves as a selective barrier between two phases.

Liquid membrane: Liquid phase existing either in supported or unsupported form that serves as a membrane barrier between two phases.


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