Ultrasonic Extraction of Nothaphoebe Coriacea Bark and Its Antioxidant Evaluation

Nothaphoebe coriacea (in Kalimantan, Indonesia, commonly known as gemor) is a native wetland-plants that can grow well in swampy areas. This tree distributed throughout South and Central Indonesia. The bark of used for bioactive compound source larvacide, mosquito repellent, hio glue. objective this research was to investigate the ultrasound-assisted extraction methods antioxidants compounds coriacea. barks were subjected ultrasound‐assisted ethanolic hexane followed by fractionation (using ethyl acetate, chloroform, hexane) antioxidant activity test performed. carried out through DPPH method. highest activities are shown ethanol extract with IC50 value 72.36 μg/mL chloroform fraction 54.18 μg/mL.