Figure 8From: Metabolism of fatty acids and lipid hydroperoxides in human body monitoring with Fourier transform Infrared SpectroscopyFTIR 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.Back to article page