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| - Adsorptions of Plasma Proteins and TheirElutabilities from a Polysiloxane Surface Studiedby an On-Line Acoustic Wave Sensor
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| - Gold electrodes of thickness-shear mode acoustic wavesensors were modified with poly[(mercaptopropyl)methylsiloxane]. The flow-through adsorption of three majorplasma proteins (human serum albumin, fibrinogen, andimmunoglobulin G) was detected by acoustic networkanalysis. The elution of fibrinogen and albumin fromcoated and unmodified gold surfaces by sodium dodecylsulfate was studied with respect to different adsorptiontimes and protein concentrations. Both sequential andcompetitive adsorptions of the three proteins on polymer-modified surfaces of sensors were examined as weresimultaneous adsorptions from binary and ternary mixtures. The experimental results confirm that the competitive behaviors of proteins in terms of adsorptive processesare explained by factors other than displacement phenomena.
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