+ Translate

Chemical study of bark from Commiphora angolensis Engl

, : Chemical study of bark from Commiphora angolensis Engl. Bol Escola Farm Univ Coimbra Edicao Cient 22: 113-128

Two types of principles were identified: tannins and anthocyanin pigments. Condensed tannins were revealed by the usual color and precipitation reactions and by quantitative determination by the methods of Lowenthol-Procter and of Deijs. The results obtained for the powder of the bark were 32.76% and 33.28% and for the alcoholic extract, 75.25% and 76.36%. The anthocyanin pigments were detected by their color reactions and by their partition between solvents. Petunidin-3-rhamnoglucoside was identified in a fraction purified by chromatogra-phy in thick paper and by elution by hydrochloric methanol, using ascending paper chromatography with the following mixture of solvents: butanol-acetic acid-water; butanol-hydrochloric acid; 1% hydrochloric acid. The presence of this pigment was confirmed through the identifi-cation of its products of hydrolysis. The petunidin was identified by some characteristic reactions and by ascending chromatography with the following mixtures of solvents: butanol-acetic acid-water; acetic acid-hydrochloric acid-water; formic acid-hydrochloric acid-water. Rhamnose in a fraction purified by solution in pyridine, using ascending paper chromatography was also identified.

(PDF 0-2 workdays service)

Order PDF Full Text


Click here to order any other PDF Full Text

Accession: 024318594

PDF Full Text: Submit

Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:

Other references

Serjeant, Graham R., 1994: The geography of sickle cell disease Opportunities for understanding its diversity. Annals of Saudi Medicine 14(3): 237-246

Anonymous, 2011: Claudins and Cancer Stem Cells. It is now believed that most epithelial tumors are maintained by a subpopulation of cells called cancer stem cells (CSCs) or tumor initiating cells (TICs) with stem cell-like properties, including self-renewal and multilineage differentiation capa...

Fanos Alfy Morcos, 1995: The impact of human activities on the erosion and accretion of the Nile Delta coast. The Nile delta has come into existence since the last ice age. Its growth was mainly the result of the deposition of sediments carried by the old branches of the Nile River under the influence of the dynamic forces in the Mediterranean. At the beg...

Gasc J M.; Lombes M.; Oblin M E.; Bonvalet J P.; Farman N., 1991: Localization of renal mineralocorticoid and glucocorticoid receptors an immunohistochemical study. Bonvalet, J -P , Et Al Colloque Inserm (Institut National De La Sante Et De La Recherche Medicale), Vol 215 Aldosterone: Aspects Fondamentaux; (Inserm (National Institute Of Health And Medical Research) Colloquium, Vol 215 Aldosterone: Fundamental Aspects); International Symposium, Fontevraud, France, June 24-26, Xvii+358p Editions Inserm: Paris, France; John Libbey Eurotext: Paris, France Illus Paper 45-54

Libosvarsky J., 1989: An analysis of interrelations of characters in bream abramis brama l. Using the method of correlation analysis, an evaluation of interrelations among nine morphometric characters was carried out in bream, taken from two distant water bodies-the River Nevezis [USSR] and the Mostiste Reservoir [Czechoslovakia]. High v...

Anonymous, 1982: Basic fertilization--correct planning. Top agrar: das Magazin fur moderne Landwirtschaft: (6) 40-42

Balc, F.; Dkmen, S.; Gencoglu, H.; Orman, A.; Turkmen, I. I.; Brck, H., 2007: The effect of fibrolytic exogenous enzyme on fattening performance of steers. Sixteen Holstein steers, 9-12 months old with 362.0+or-17.0 and 363.6+or-16.0 kg initial body weight for steers in control and treatment groups, respectively, individually penned were used to investigate the effect of a fibrolytic enzyme (Promote...

Skogen, A., 1977: Hippophae rhamnoides in Breheimen. Blyttia 5 (4) 173-178

R. J. Hart; L. O. Nicolaysen; N. H. Gale, 1981: Radioelement concentrations in the deep profile through Precambrian basement of the Vredefort Structure. Journal of Geophysical Research: Solid Earth 86(B11): 10639-10652

Lee S.K.; Penner P.L.; Cox M., 1991: Impact of very low birth weight infants on the family and its relationship to parental attitudes. This study tested common assumptions that very low birth weight (VLBW) infants (< 1500 g) adversely affected families and that if affected parents could choose again, they would prefer not to save potentially handicapped VLBW infants. A survey...