TY  - JOUR
T1  - Evaluation of Flavonoids and Total Phenolic Contents of Stem Bark and Leaves of <I>Parkia biglobosa</I> (Jacq.) Benth. (Mimosaceae)-Free Radical Scavenging and Antimicrobial Activities
AU - , H. Millogo-Kone AU - , M. Lompo AU - , F. Kini AU - , S. Asimi AU - , I.P. Guissou AU - , O. Nacoulma 
JO  - Research Journal of Medical Sciences
VL  - 3
IS  - 2
SP  - 70
EP  - 74
PY  - 2009
DA  - 2001/08/19
SN  - 1815-9346
DO  - rjmsci.2009.70.74
UR  - https://makhillpublications.co/view-article.php?doi=rjmsci.2009.70.74
KW  - Parkia biglobosa
KW  -total phenolics
KW  -flavonoids
KW  -antioxidant
KW  -antimicrobial
AB  - The total phenolics and the flavonoids contents of stem barks and leaves of <I>Parkia biglobosa</I> harvested at different periods of the year, on 2 different areas of Burkina Faso (Yako and L&egrave;na), were determined. The total phenolics were extracted according to Harborne&#146;s method and also by the means of a soxhlet apparatus. The determination of the phenolics contents was conducted with 8 extracts using tannic acid as standard. The flavonoids contents of the 8 extracts were also determined, using quercetin as a reference substance. The results showed that the total phenolics contents vary significantly all year round at the same area and also from L&egrave;na to Yako. They also revealed that the flavonoids contents of the leaves harvested at Yako ranged from 1.49-1.80% throughout the year. The results also confirmed that the leaves contain more flavonoids than the barks. Antioxidant activity was determined by the means of 1, 1-diphenyl-2-picrylhydrazyl (DPPH) assay. The results showed effectiveness with a radical inhibition ranging from 25.53&plusmn;3.56-55.449&plusmn;4.53 mg mL<SUP>-1</SUP>. The antibacterial assays on gram positive <I>Staphylococcus aureus </I>showed that the hydroalcoholic extract of stem bark harvested in May at Yako was the most effective of all the extracts.
ER  -