[Response] In figure 2A, it is the spectra of one sample, we put the spectra to show the most essential spectral regions correspond to ROOH, FFA (C=O bond), and -HC=CH- (trans) functional groups.
27. If the author is showing a spectrum of a sample in figure 2A, this peak is not clear in that spectrum. It is wide and weak. If he/she is showing a variation spectrum then how can he/she be sure it is not originating from noise?
[Response] Figure 2A is showing aspectrum of a sample, and we have put a clear spectrum and put the illustration in the figure 2A to make it clear.
28. In figure 2B, the difference in intensity between the black and the blue line is less than 0.06. How can the author prove that this difference is meaningful, especially if the measurement is a transmission based one?