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Figure 8 | Lipids in Health and Disease

Figure 8

From: Metabolism of fatty acids and lipid hydroperoxides in human body monitoring with Fourier transform Infrared Spectroscopy

Figure 8

FTIR spectra in the second derivative form of lip surfaces measured at different clock times. (top) Spectral changes in the area around 960 cm-1, related to trans-alkene CH-stretching mode. The difference between the intensities at 952.9 and 968.4 cm-1 was calculated and denoted as trans-alkene intensity or [hydroperoxide]. (middle) spectral changes in the area around 1740 cm-1, related to fatty ester mode. The difference between the intensities at 1759.9 and 1740.5 cm-1 was calculated and denoted as fatty ester intensity or [TG]. (bottom) illustration of lipid hydroperoxide structure, indicating the presence of trans-alkene in the structure.

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