In comparison with NWS, two additio

In comparison with NWS, two additional bands at 1705 cm1 and 2846 cm1 were noted in the FTIR spectra of NWS–LA samples (Fig. 2A and B), which were assigned to vibration of carbonyl and asymmetric stretching vibrations of CH3 and CH2 of fatty acids , respectively. Similar results were also observed for MA and PA . The carbonyl band of pure LA was positioned at about 1701 cm1