Abstract
<p>The microwave-assisted extraction conditions of flavonoids in Physalis alkekengi. var. franchetii stems were optimized using a L33 Box-Behnken Design. The optimized extraction conditions were determined as follows: 60% for the ethanol concentration, 12.4 for the liquid-to-solid ratio, and 531.4 W for the microwave power, respectively. The yield of the extract obtained under the optimized conditions was 3.85 mg g−1 which was close to the predicted value. In addition, the extract exhibited potent acetylcholinesterase inhibitory activity, with the IC50 value of 11.61 μg mL−1 and a maximal inhibition ratio 89.81%. Both the yield and activity were better than reflux extraction.</p>
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