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. Author manuscript; available in PMC: 2014 Aug 14.
Published in final edited form as: Colloids Surf B Biointerfaces. 1995 Mar 8;4(2):65–75. doi: 10.1016/0927-7765(94)01150-4

Fig. 6.

Fig. 6

Half lifetime of desorption (in minutes) shown as a function of advancing contact angle of the quaternary amine gradient surface: faster (circles, Fig. 6a) and slower (squares, Fig. 6b) desorption of the two adsorbed protein populations in two buffers of ionic strengths 0.0185 M (filled symbols) and 0.1185 M (empty symbols) respectively.