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RESEARCH ON EXTRACTION TECHNOLOGY, ANTIBACTERIAL AND ANTIOXIDANT ACTIVITY OF ETHANOL EXTRACT FROM LEAVES OF ABUTILON THEOPHRASTI MEDIC.
Acta Poloniae Pharmaceutica 2017 May
This paper described the extraction procedure and determination method for the total flavonoids in ethanol extract from the leaves of Abutilon theophrasti Medic., and evaluated antibacterial and antioxidant activity. Maximum extraction yield was achieved using 60% ethanol, 1 : 30 (g/mL) of a ratio of material to solvent, 20 min of extraction time, 40 kHz of ultrasonic frequency, 100 W of ultrasonic power, 600C of extraction temperature and two extraction cycles. Total flavonoids content was 16.79 RE mg/g medicinal materials. The extracts had effective antibacterial activity against 24 test strains from S. aureus and E. coli, MICs ranged from 2.18 to 8.7 mg/mL; it was also revealed that the extracts demonstrated high flavonids content and potent antioxidant activity, achieved by hydroxyl radical, DPPH radical and ABTS radical scavenging. These results indicated thathe extract may be a promising plant demonstrating antibacterial and antioxidant activities.
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