Fig. 3.
Influence of liquid–solid ratio on the contents of total phenolics, total flavonoids and total antioxidant activity (DPPH, ABTS assays) of the extracts from asparagus residuesb. The results were expressed as mean ± standard deviation (n = 3), the different letters indicated that the difference was significant (P < 0.05), and the only same letter was expressed as insignificant difference (P > 0.05). b Extractions were carried out for 2 h with the solvent of 50 % ethanol at temperature of 80 °C