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Lysozyme, human serum albumin, b-lactoglobulin and ovalbumin. Adsorption kinetics were investigated by streaming potential measurements of a HA surface in contact with a protein solution, allowing monitoring of changes in the zeta potential of the protein-covered HA surface in real time. The adsorbed amounts show that, as compared to most of the other proteins, the saliva proteins have remarkably low adsorption aﬃnity. The measured values for the electrophoretic mobilities indicate that positively charged proteins in the saliva mixture preferentially adsorb on to the negatively charged HA surface.
Scotti, I. R. Bellobono, C. Canevali, C. Cannas, M. Catti, M. D’Arienzo, A. Musinu, S. Polizzi, M. Sommariva, A. Testino and F. Morazzoni, Chem. , 2008, 20, 4051. 49. C. Ada´n, A. Bahamonde, M. Ferna´ndez-Garcı´ a and A. Martı´ nez-Arias, Appl. , B, 2007, 72, 11. CHAPTER 3 Surface Charge Measurements on Biomaterials in Dry and Wet Conditions M. GREGOR,a,b T. PLECENIK,a A. PLECENIK,a C. WOLF-BRANDSTETTER,c D. SCHARNWEBERc AND S. A. M. 1 Introduction Electrical modiﬁcations of the surface of biomaterials can play a signiﬁcant role in manipulating the interactions of biological species such as proteins and cells on such surfaces.
G. depolarization or discharging) is usually achieved by increasing the sample temperature and the resulting induced current is directly measured. It can provide valuable information about the creation, storage and relaxations of charges in bulk material and its surface. On the basis of such information, it is possible to study the inﬂuence of the surface and volume charge of biomaterials on mediating interactions of biological species at the Biomaterials’ surfaces. The main disadvantage of TSDC method is that the charge or polarization is destroyed by the measurement.