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Abstract

A STUDY ON THE PHYTOCHEMICAL AND ANTIOXIDANT ACTIVITIES OF TWO COMMON WEEDS

Nistha Shrestha*, Sonu Rauniyar, Dharma Prasad Khanal, Bechan Raut and Dipendra Shakya

ABSTRACT

The principal objective of this study was to analyze the phytochemical and antioxidant activities of two common weeds. Invasion of weeds pose an enormous threat to our ecosystem. If we are able to mobilize the use of such weed by establishing its medicinal use we can steer the management process into utilization instead of weed control. The qualitative phytochemical prescreening was performed by color method. The total polyphenolic content of the extracts were determined by using Folin-Ciocalteau reagent and the total flavonoid content was determined according to colorimetric method. The antioxidant activity was assessed by using DPPH radical scavenging method. The phytochemical screening revealed the presence of carbohydrates, tannins, glycosides, flavonoids and phenols in Lantana camara, and presence of carbohydrates, alkaloids, saponin, tannin, glycosides, flavonoid and phenol in Erigeron bellidioides. The antioxidant activity test for L. camara revealed that the IC 50 value of Methanol, Ethyl acetate and Hexane extract were 13.3583 mcg/ml, 83.786 mcg/ml and >100 mcg/ml respectively where as for E. bellidioides the IC 50 value of Hexane, Ethyl acetate, Methanol extract were >100 mcg/ml, 99.52 mcg/ml and 26.331 mcg/ml respectively. The findings of this study revealed that the methanolic extracts of L.camara and E. bellidioides have the highest antioxidant activity.

Keywords: antioxidant, L.camara, E.bellidioides, polyphenolic compounds, flavonoid, DPPH radical.


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