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. 2015 Apr 19;17(2):178–191. doi: 10.1007/s12017-015-8349-7

Fig. 2.

Fig. 2

Second-derivative FTIRMS spectra of: a lipid massive; b Amide I–II spectral range (seven-point Savitzky–Golay filtration was applied to produce decent-looking spectra). For the sake of clarity, the second derivative was multiplied by −1