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. 2016 Oct 19;9(10):853. doi: 10.3390/ma9100853

Figure 2.

Figure 2

Surface characterization of basic fibroblast growth factor (bFGF) bound to porous α-TCP via heparin. (a) X-ray photoelectron spectroscopy (XPS) S 2s and (b) XPS N 1s spectra.