+ Site Statistics
PDF Full Text:
+ Resolve Accession
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
Submit PDF Full TextSubmit PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn
Follow on LinkedInFollow on Tumblr

+ 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.

(Delivery within 1-5 workdays)

Accession: 024318594

PDF Full Text: Submit

Submit PDF Full Text

No spam - Every submission is manually reviewed

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we have purchased)

Select a PDF file:

Other references

Saint Romas G.; Le Maho Y., 1976: Decrease in body mass during the 1st days of fasting in the emperor penguin aptenodytes forsteri. Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences Serie D Sciences Naturelles 283(9): 1097-1099

Eben A., 1988: Methodological aspects of the determination of the acute inhalation toxicity of spray can ingredients. Spray-can ingredients, if liberated in confined spaces, are potential health hazards for man. Thus, appropriate inhalation toxicity studies have to be performed in accordance with internationally recognized guidelines, e.g. the US Environmental Pr...

Qinghai Sheng; Jiancai Li; Mohammad S. Alam; Xinping Fang; Mingruo Guo, 2008: Gross composition and nutrient profiles of Chinese yak (Maiwa) milk. International Journal of Food Science & Technology 43(3): 568-572

Lagerwerff, 1967: Heavy-metal contamination of soils. The sources of heavy metal contamination of the soil include: aerosols, pesticides, limestone and phosphate fertilizers, manures and sewage sludges, and mine wastes. The majority of the metals discussed in the paper have a number of properties in...

Geitler, L., 1973: On the life history and morphology of pennate diatoms. II. The orientation of axes of mother cells and auxospores in Navicula seminulum; III. cymbella ventricosa and dissymmetry in diatoms. Osterreichische botanische Zeitschrift: 22 (3) 125-132

Prusakova, L. D.; Kefeli, V. I.; Belopukhov, S. L.; Vakulenko, V. V.; Kuznetsova, S. A., 2008: Role of phenol compounds in plants. Plant growth regulators of phenol nature capable both to stimulate and to inhibit the growth and physiological processes in plants were reviewed. Progresses achieved in this field changed our opinions on the role of phenol compounds. which are no...

Boldyrev A.A., 1980: Conformational properties of the calcium pump of the sarcoplasmic reticulum. Journal Of Molecular & Cellular Cardiologyppl. 1: 20

Maudsley D.V., 1979: Regulation of poly amine biosynthesis. The polyamines, putrescine, spermidine and spermine, are simple aliphatic amines exhibiting a wide range of biological activity. There are 4 enzymes involved in polyamine biosynthesis: 2 decarboxylases [ornithine and S-adenosyl-L-methionine decarb...

Galloway N.T.M.; Nandedkar S.D.; Webster G.D., 1988: Lateralization of urethral sphincter dysfunction using computer analysis of electromyography. Journal of Urology 139(4 PART 2): 169A

Bajcetic, B., Et Al., 1964: The interdependence of the development of livestock industry in the mountainous and lowland areas of Bosnia and Hercegovina. Possibilities for the division of labour among farms in the mountain areas and farms in the lowlands are examined, mainly from the standpoint of better utilization of livestock production capacities in the mountain area. Considerations on the loca...