2. Experimental 2.1. Materials The Institute of Materials Science and Technology,ViennaUniversity of Technology,provided gamma-irradiated PE-UHMW (GUR-1050 PE-UHMW)and PE-UHMW samples doped with VitaminE.All chemicals and reagents,unless in dicated specifically,were from Sigma-Aldrich(USA)with a purity of at least 99% if not stated otherwise.Ultrapure water (uH2O) was obtained from a Simplicity system (Millipore,USA) with a specific conductivity of ˝m ≤18 S/cm.Human synovial fluid (SF), sampled after joint revision,was provided by the Institute of Materials Science and Technology.
obtained fromaSimplicitysystem(Millipore,USA)withaspe-
cific conductivityof ˝m ≤18 S/cm.Humansynovialfluid(SF),
sampled afterjointrevision,wasprovidedbytheInstituteof
Materials ScienceandTechnology.