Phytochemical Screening Of Ethanolic Extract Research Articles

Phytochemical analysis of ethanolic extract of Dichrostachys Cinerea W and Arn leaves by a thin layer chromatography, high performance thin layer chromatography and column chromatography.

Background:The leaves of Dichrostachys cinerea are used as laxative, diuretic, painkiller. It is also used in the treatment of gonorrhoea, boils, oedema, gout, veneral diseases and nasopharyngeal affections, etc.Materials and Methods:The Phytochemical investigation of ethanolic extract of D. cinerea leaves were performed by standard chemical tests, thin layer chromatography (TLC) by using various solvent systems, and by high performance liquid chromatography (HPTLC). Two compounds were isolated by column chromatography and one of the compounds was identified by various spectral studies.Result:Preliminary phytochemical screening of ethanolic extract of D. cinerea leaves showed the presence of Carbohydrates, proteins, Glycosides, Saponins, Tannins, Aminoacids and Terpenoids. The TLC and HPTLC fingerprint of ethanolic extract were studied and various fractions were isolated by column chromatography and one of the fraction contain β-amyrin glucoside which was confirmed by Infra Red[IR] Spectroscopy, 1H-Nuclear Magnetic Resonance (NMR), C-13 NMR and Mass spectroscopic (MS) studies.

Preliminary Phytochemical and Anti-asthmatic Studies on Stem Bark of Balanites roxburghii Planch.

The present study deals with the phytochemical screening and effect of ethanolic extract of stem bark of Balanites roxburghii Planch. on experimental models of bronchial asthma. Phytochemical screening of the ethanolic extract showed the presence of alkaloids, saponins, flavonoids, tannins and phenolic compounds as chemical constituents. Significant increase in preconvulsion time was observed due to pretreatment with Balanites roxburghii when the guinea pigs were exposed to acetylcholine (Ach) and histamine. This bronchodilating effect of Balanites roxburghii was comparable to Ketotifen fumarate. Thus, present study revealed that the ethanolic extract of stem bark of Balanites roxburghii has significant antihistaminic (H1 receptor antagonist) activity. The Balanites roxburghii Planch. by virtue of the said action will prove to be very effective in the antihistaminic therapy of asthma.

Antimicrobial activity of some medicinal plants of the Cerrado, Brazil

In order to determine the potential of Cerrado plants as sources of antimicrobial activity, the phytochemical screening of ethanol extracts from Virola surinamensis, Qualea grandiflora, Alchornea castaneifolia, Hancornia speciosa and Curatella americana traditionally used in folk medicine are reported.