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Antibacterial activity of indole alkaloids from Aspidosperma ramiflorum BJMBR
Tanaka,J.C.A.; Silva,C.C. da; Oliveira,A.J.B. de; Nakamura,C.V.; Dias Filho,B.P..
We evaluated the antibacterial activities of the crude methanol extract, fractions (I-V) obtained after acid-base extraction and pure compounds from the stem bark of Aspidosperma ramiflorum. The minimum inhibitory concentration (MIC) was determined by the microdilution technique in Mueller-Hinton broth. Inoculates were prepared in this medium from 24-h broth cultures of bacteria (10(7) CFU/mL). Microtiter plates were incubated at 37ºC and the MICs were recorded after 24 h of incubation. Two susceptibility endpoints were recorded for each isolate. The crude methanol extract presented moderate activity against the Gram-positive bacteria B. subtilis (MIC = 250 µg/mL) and S. aureus (MIC = 500 µg/mL), and was inactive against the Gram-negative bacteria E. coli...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Aspidosperma ramiflorum; Antibacterial activity; Monoterpenoid indole alkaloids; Ramiflorines A and B.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000300009
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