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Release kinetics of dansyl bisphosphonic acid on the surface of Ti6Al4V foil. The foil was incubated in 1 mL phosphate buffer (pH 7.4) at 37°C. Dansyl fluorescence was recorded with with λex 337 nm and λem 520 nm. The data was expressed as release percentage = (Fsample-F0)/(Ffinal-F0). Fsample: the fluorescence at a certain time point; F0: background of phosphate buffer; Ffinal: fluorescence of the loading dansyl bisphosphonic acid.
