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Phytochemical and antioxidant properties of bark and stems extract of Strychnos camptoneura Gilg and Busse (Loganiaceae)

Author Affiliations

  • 1Department of Biochemistry and Pharmacology, Health Sciences Faculty, University Marien Ngouabi, P .O. Box 69, Brazzaville, CONGO
  • 2Department of Biochemistry and Pharmacology, Health Sciences Faculty, University Marien Ngouabi, P .O. Box 69, Brazzaville, CONGO
  • 3Departments of Exact Sciences, ENS, University Marien NgouabiI, P.O. Box 69 Brazzaville, CONGO
  • 4Vegetable Chemistry and life unity, Technogical and Sciences Faculty, University Marien NgouabiI, P.O. Box 69, Brazzaville, CONGO
  • 5Departments of Exact Sciences, ENS, University Marien NgouabiI, P.O. Box 69 Brazzaville, CONGO
  • 6Department of Biochemistry and Pharmacology, Health Sciences Faculty, University Marien Ngouabi, P .O. Box 69, Brazzaville, CONGO

Res.J.chem.sci., Volume 6, Issue (10), Pages 19-23, October,18 (2016)


Phytochemical and antioxidants properties of the barks and the stems extracts of Strychnos camptoneura (Loganiaceae) were studied using classic tests. The aqueous, hydroethanolic, ethanolic and chloroformic extract have been prepared. The most important yield was obtained with hydroethanolic extract of the barks. The qualitative analyses by colored reactions in tubes of the aqueous extract have emphasized respectively 13 and 11 chemical families in bark and stems. The thin layer chromatography of the chloroformic extract revealed the presence of sterols and terpenoids; the one of hydroethanolic extract, the presence of flavonoids and phenolic acid in the two organs. The quantitative evaluation showed more contents raised in alkaloids, total phenol (ethanolic extract) and flavonoids (hydroethanolic extract) in the bark that in the stems. Antioxidant properties according 1.1-diphényl-2-picrylhydrazyle (DPPH) method revealed more important effect with ethanolic extract of the bark and stem than with the aqueous and hydroethanolic extracts. These results certainly explain the important use of this plant in traditional medicine.


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