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. 2024 Mar 1;5:1332298. doi: 10.3389/froh.2024.1332298

Figure 2.

Figure 2

Time series of 31P MAS-NMR spectra of HA powder treated with SDF and immersed in remineralization solution. The duration of immersion is indicated next to each spectrum. The peak position (2.7 ppm) represents the HA pattern which remains the same throughout the time sequence.