Ultrasonic Extraction of Nothaphoebe Coriacea Bark and Its Antioxidant Evaluation

Abstract

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

Improvement in the stability and bioavailability of pumpkin lutein using β‐cyclodextrin microcapsules

“…With the extension of extraction time, the extraction efficiency of lutein between different methods also represented an increasing trend (Figure 1b ). Sonication is an effective tool for extracting organics, it requires simple equipment, and liquid–solid separations can usually be achieved in a short time (Sunardi & Nisa, 2021 ). Compared with the two methods, microwave‐assisted extraction was time‐saving and more efficient, which has a certain auxiliary effect on lutein extraction in terms of extraction time.…”

“…of lutein between different methods also represented an increasing trend (Figure 1b). Sonication is an effective tool for extracting organics, it requires simple equipment, and liquid-solid separations can usually be achieved in a short time (Sunardi & Nisa, 2021). As shown in Figure 1c, the OD value of the two treatments showed an increasing trend in the process of the solid-liquid ratio increasing, which indicated that lutein was in full contact with ethanol in the beginning and had been completely exact.…”