| http://www.w3.org/ns/prov#value | - Initial efforts to incorporate thin polymeric frit materials in multi-layer microfluidic separation devices included materials such as Nuclepore???, a track-etched polycarbonate membrane having a thickness of 6-11 microns, a pore size of 0.015-12.0 microns, and a pore density of 1???105-6???108 pores/cm2 (Whatman, Inc., Clifton, N.J.) (the ???polycarbonate frit???).
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