Figure 1. Effects of four single factors on yield of total flavonoids: (a) ethanol concentration, (b) liquid to material ratio, (c) extraction temperature, (d) extraction time. Note: there was a significant (P < 0.05) difference among the different yields of total flavonoid

From

Study on Extraction, Identification, and Biological Activity of Compounds in Leaves of Corylus mandshurica

Shen Li, Liwen Tang, Mingye Ma, Yao Sun, Mengqing Guo, Rui Ma

Journal of Food and Nutrition Research. 2024, 12(2), 85-97 doi:10.12691/jfnr-12-2-3