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. 2022 Jun 23;27(13):4035. doi: 10.3390/molecules27134035

Figure 11.

Figure 11

ATR-FTIR spectra of bone (a) and tooth (b) immersed in 75% sulfuric acid for 2 h (blue line), 6 h (red line), 24 h (green line) and original sample (black line).