Consulta: subjectFacets:"Alpha- and beta-amyrin"
Registros recuperados: 1
Data/hora: 10/06/2024 12:14:01

An evaluation of antibacterial activities of Psidium guajava (L.)
Provedor de dados: 52
Autores: Sanches,Neviton Rogério; Garcia Cortez,Diógenes Aparício; Schiavini,Michelle Simone; Nakamura,Celso Vataru; Dias Filho,Benedito Prado.
The present study was designated to evaluate the antibacterial activities of aqueous and ethanol:water extracts from leaves, roots and stem bark of Psidium guajava L. The antibacterial activities of the extracts against bacteria were tested by using both microdilution assay. The aqueous extracts of P. guajava leaves, roots and stem bark were active against the gram-positive bacteria Staphylococcus aureus (MICs=500, 125 and 250 µg/ml, respectively) and Bacillus subtilis (MICs=500 µg/ml), and virtually inactive against the gram-negative bacteria Escherichia coli and Pseudomonas aeruginosa (MICs &gt;1000 µg/ml). The ethanol:water extracts showed higher antimicrobial activity as compared to aqueous extracts. Based on this finding, the ethanol:water extract of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Psidium guajava; Antibacterial activities; Flavonoids; Alpha- and beta-amyrin; Beta-sitosterol.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000300014