Abstract:
ABSTRACT
Clematis hirsuta plant is one of the commonly used traditional medicinal plants in Ethiopia for
treating wounds, headache, and cough. The current study intended to investigate the antibacterial
and anti-oxidative activities of the crude extract of the leaves obtained using petroleum ether,
chloroform, and ethanol. Antioxidant and antibacterial activities of these three solid fractions
were also investigated. The antioxidant activity was evaluated using 2,2-diphenyl-1-picrylhydrazyl
radical (DPPH) and ferric reducing antioxidant power (FRAP) assays. The antibacterial activity
was examined using the Agar disk diffusion method for all the crude extracts Folin Ciocalteu
method was used to determine the total phenolic and aluminum chloride colorimetric method was
used to determine the flavonoid contents in these extracts. The results showed that the ethanol
extract of the leaves exhibited the highest antioxidant activity of 82.86 % in DPPH with an IC 50%
value of 43.15 ppm. In FRAP assay 36.923 % with an IC 50% value of 118.30 ppm, which
appeared to contain more phenolic and flavonoid contents (163.62 mg GA/g, and 161.00mgCE/g
of sample). The chloroform extract exhibited the highest antibacterial activity against three
bacterial strains (S. aureus, S. pyogenes, and E. coli). This study provides evidence that the leaves
of the Clematis hirsuta could be a good source of natural antioxidants, and antibacterial agents.
Keywords: Clematis hirsuta, antioxidant activity, antimicrobial activity, total phenolic content
and total flavonoid contents, isolation, UV Vis, FTIR spectroscopy