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. 2017 Sep 26;4(4):80. doi: 10.3390/bioengineering4040080

Figure 3.

Figure 3

Fourier transform infrared (FTIR) spectra of MCM-41 and lysine-grafted MCM-41 (MCM-LYS). The insets show regions from 4000–2500 cm−1 (left) and 2000–1300 cm−1 (right) to better appreciate the changes arising from the grafting of pristine MCM-41.