Article title: Effects of natural antioxidants on the oxidative stability of waste cooking oil biodiesel
Authors: Nagarajan J, Narayanasamy B
Journal: Biofuels
DOI: 10.1080/17597269.2019.1711320
Figure 2 and Table 3 have been replaced in the above-named article. Details are as shown below.
1. Figure 2.
a. FTIR spectra of the turmeric extract. b. FTIR spectra of the cinnamon extract. c. FTIR spectra of the black pepper extract. d. FTIR spectra of the red bell pepper extract. e. FTIR spectra of the water melon seed extract.
Figure 2 indicating the FTIR spectra of all the selected natural antioxidants have been updated with the phenol functional group wave number. The axis labels of the graphs have been corrected. The images are improved for clarity with updating the wave numbers corresponding to the functional group.
2. Table 3.
Comparison of functional compounds in natural antioxidant extracts.
The phenol functional group has been updated in Table 3 with its wave number for the selected natural antioxidants. Also the wave numbers of other functional group for the selected natural antioxidants has been updated as per changes in Figure 2.