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- W16252724 abstract "In order to better understand the biofilm formation mechanisms, the adsorption of a model protein (BSA) on a 316L stainless steel surface in aqueous solution and the effect of different salts (NaCl, NaCl+MgCl2, NaCl+CaCl2) have been investigated by X-ray photoelectron spectroscopy (XPS). The N1s XPS spectrum exhibits a signal at 400.4 eV which is characteristic of the amine or amide groups of the protein. The XPS data reveal that the protein is adsorbed on the stainless steel surface and that the amount of adsorbed protein depends on the nature and the concentration of the dissolved salts. NaCl has no effect on the BSA adsorption whereas MgCl2 and CaCl2 promote the adsorption of the protein on the stainless steel surface. The Cls signal was decomposed in four components corresponding to the different chemical groups in the BSA (C-C, C-O and C-N single bonds, C=N or N-C=N, CONH or COOH groups), providing evidence that the adsorbed BSA is chemically intact. The stainless steel surface composition was investigated by XPS. The enrichment of Mo and Ni under the oxide layer generally observed in the absence of protein is also found after adsorption of protein, as well as the enrichment of Cr3+ and Mo oxides in the oxide layer. Angle-resolved XPS measurements indicate that the Mo6+ is partly converted in the presence of adsorbed BSA. This finding suggests the existence of a specific interaction between the protein and the molybdenum present on the surface." @default.
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- W16252724 date "2006-01-01" @default.
- W16252724 modified "2023-10-18" @default.
- W16252724 title "XPS characterisation of BSA adsorption on stainless steel" @default.
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- W16252724 doi "https://doi.org/10.1016/b978-044452224-5/50058-5" @default.
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