Download scientific diagram | – Estrutura química do ácido úsnico (C 18 H 16 O 7). from publication: Validation of a UV-spectrophotometric analytical method. Os testes cromatográficos revelaram a presença de ácido úsnico em todos os extratos, porém, em maior quantidade na amostra do Pará. O biocromatograma. Atividade antimicrobiana in vitro do extrato orgânico de Cladonia substellata Vainio e ácido úsnico frente Staphylococcus spp. obtidos de cães e gatos.

Author: Voodoorg Arajinn
Country: South Sudan
Language: English (Spanish)
Genre: Life
Published (Last): 7 May 2005
Pages: 406
PDF File Size: 20.75 Mb
ePub File Size: 10.46 Mb
ISBN: 487-7-24725-540-1
Downloads: 3906
Price: Free* [*Free Regsitration Required]
Uploader: Tabar

Extraction, isolation, and elucidation of usnic acid The branched thallus of Evernia prunastri were collected at Usnjco farm, located 30 km from the city of Cajamarca-Peru and identified by Dr. Fraction D was cooled at room temperature then filtered whereby a precipitate was obtained as a greenish yellow solid. Biochemical Systematics and Ecology Review native language verification applications submitted by your peers.

Revista Colombiana de Química

Introduction Tuberculosis TBcaused by the bacteria Mycobacterium tuberculosis aicdo, is a major public health problem that annually kills approximately usnifo million people worldwide. The branched thallus of Evernia prunastri were collected at Porcon farm, located 30 km from the city of Cajamarca-Peru and identified by Dr. Staphylococcus nepalensis in the guano of bats Mammalia.

Identification of Lichen Substances. Le informazioni riportate hanno solo fine illustrativo. If well C11 remained yellow, incubation was continued and tetrazolium-Tween 80 solution was added to wells D11, E11, F11, and O11 on days 9, 11, 13, and 15, respectively. In humans, a hepatotoxic effect was observed when it was used systemically Moura et al. According to Frank et al. Annales Ackdo Fennici Antimicrobial activity of biological active compounds from the lichen Caldonia crispatula.


A Computational Experiment for the Organic Laboratory.

Gloria Eva Tomas Chota. The MIC values obtained by compound 1 provide a better prospect to be potentially active as compared to compound 2. O experimento foi realizado em triplicata.

Entretanto, Pereira et al. It should be mentioned that a wide band was present between and cm -1due to the many hydrogen bonds present in the solid state. It was observed that the organic extract of C. Usnic acid mg, 1. One of the multidrug-resistant S. Usnic acid is a yellowish, highly functionalized dibenzofuran metabolite found in various lichen genera distributed in species of Cladonia, Usnea, Lecanora, Ramalina, Evernia and Parmotrema.

Grading comment vielen Dank. Materials and methods In acidk, all solvents and reagents Acros Organics or Sigma Aldrich were used without prior purification. No teste de sensibilidade aos antimicrobianos frente Staphylococcus spp.

Acido usnico – Wikipedia

The MIC values obtained by compound 1 provide a better prospect to be potentially active as compared usnick compound 2. It contains several secondary metabolites with biological activity, including usnic acid, which has exhibited a wide range of biological activities.


Antimicrobial activity of biologically-active compounds from lichen Cladonia crispatula. Generally, MDR-TB includes the strains resistant to at least isoniazid and rifampin, considered as the more efficient first-line drugs against TB. The solution was usnicoo at room temperature and stored in aciod refrigerator for two days.

The highlighted bands were compared by staining reaction and values of Rf Retention Factorwith patterns of usnic acid applied as standards. Nineteen samples of biofilm-producing Staphylococcus spp. Pharmaceutically relevant metabolites from lichens.

Production of bioactive metabolites from lichen Cladonia substellata Vainio

Results and discussion Extraction, isolation and elucidation of usnic acid Usnic acid 2. The 1 H-NMR spectrum shows characteristic signals of usnic acid and the corresponding signals of the protons belonging to the pyridine group, which appear upfield Figure 3.

The hydroxyl group C 3 -OH appears at Biological activity against M.

Bolm Ecotropica Ecosistemas Trop. It was identified through the morphological and chemical characteristics of its stem. Direct bioautography on thin layer, cromatograms as method for detecting fungitoxic substances.