The inhibition of the enzyme seems to depend both on the presence of a double bond and on the length of the alkylic chain; in fact only the unsaturated long chain aldehydes (E)-2-octenal and (E)-2-nonenal inhibited the enzyme.
The subdivision of the spectra was carried out according to Wilson (1987): alkylic units (0-45 ppm), O-alkylic units (45-110 ppm), aromatic units (110-160 ppm), and carboxylic units (160-220 ppm).
(1995) found only a slight decomposition of carbohydrates and no selective preservation of alkylic biomacromolecules (Fig.