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>Combined effects of the extraction time and ethanol concentration on the TFC at constant ultrasonic power (150 W) and temperature (40°C).</div>

BioMed Research International

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Figure 4

Figure 4: 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 4 | Optimization of Ultrasound-Assisted Extraction of Flavonoids from Celastrus hindsii Leaves Using Response Surface Methodology and Evaluation of Their Antioxidant and Antitumor Activities 