Optimization of Ultrasound-Assisted Extraction of Flavonoids from <i>Celastrus hindsii</i> Leaves Using Response Surface Methodology and Evaluation of Their Antioxidant and Antitumor Activities

<div>Effect of various concentrations of <i>C. hindsii</i> leaf extract (a and c) and Trolox (b and d) in free radical scavenging tests: (a and b) DPPH assay and (c and d) ABTS assay.</div>

BioMed Research International

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Figure 5

Figure 5: Optimization of Ultrasound-Assisted Extraction of Flavonoids from <i>Celastrus hindsii</i> Leaves Using Response Surface Methodology and Evaluation of Their Antioxidant and Antitumor Activities 

Figure 5 | Optimization of Ultrasound-Assisted Extraction of Flavonoids from Celastrus hindsii Leaves Using Response Surface Methodology and Evaluation of Their Antioxidant and Antitumor Activities 