Fig. 4
1H NMR spectra of biodiesel, when the catalyst is A) no exposed to air (NEA), B) exposed to air for 1Â h C) exposure to air for 2Â h D) exposure to air for 3Â h
Fig. 4 | Biotechnology for Sustainable Materials
1H NMR spectra of biodiesel, when the catalyst is A) no exposed to air (NEA), B) exposed to air for 1Â h C) exposure to air for 2Â h D) exposure to air for 3Â h