Figure 4
1H NMR spectra of the l-lysine samples after hydrothermal treatment at 130 °C using aqueous solutions at different pH. From bottom to top: untreated l-lysine and pH 2.5, 7.3, 9.7, and 13.
Figure 4 | Scientific Reports
1H NMR spectra of the l-lysine samples after hydrothermal treatment at 130 °C using aqueous solutions at different pH. From bottom to top: untreated l-lysine and pH 2.5, 7.3, 9.7, and 13.
