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Electrochemical studies on the adsorption of amino acids in relation to the compatibility of prosthetic materials and the human body

✍ Scribed by Matthews, Dennis B.

Publisher: John Wiley and Sons
Year: 1969
Tongue: English
Weight: 660 KB
Volume: 3
Category: Article
ISSN: 0021-9304
DOI: 10.1002/jbm.820030310

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✦ Synopsis

The Lippman electrocapillary method was used to survey the adsorption behavior of 25 amino acids at the mercury-solution interface. The amount of surface excess of adsorbed amino acid (I?;), as evidenced by lowering of interfacial tension, was found to increase with the number of double bonds and/or additional nitrogen atoms which provide electron pairs. No influence of dipole moment on adsorption was observed. Adsorption was more extensive at potentials positive to the potential of zero charge, indicating a possible electrontransfer adsorption mechanism, i.e., a sharing ?r-electrons rather than dipole interaction with the metal. These results are consistant with the enhanced adsorption of proteins at anodic potentials since the side groups extending from peptide linkages on a given protein are the R groups of various amino acids.

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