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| Pereira,Aline C.; Oliveira,Denilson F.; Silva,Geraldo H.; Figueiredo,Henrique C.P.; Cavalheiro,Albero J.; Carvalho,Douglas A.; Souza,Luciana P.; Chalfoun,Sára M.. |
| To find out natural antimicrobial agents as alternative in therapeutics and to preserve food, the methanol extract of Solanum palinacanthum aerial parts was submitted to purification steps guided by antibacterial and antifungal assays. As a consequence, the flavonoid rutin and 3,5-dicaffeoylquinic acid were isolated by column chromatographyand high performance liquid chromatography, and identified by mass and nuclear magnetic resonance spectrometry. Minimal inhibitory concentrations (MIC) of the quinic acid derivative against Aeromonas hydrophila, Bacillus subtilis, Staphylococcus aureus and the fungus Aspergillus ochraceus were 250, 1000, 1000 and > 568µg/mL, respectively. Against the same microorganisms, MIC for rutin were 1000, > 1000, > 1000... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Solanum palinacanthum 3; 5-dicaffeoylquinic acid rutin antimicrobial activity. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652008000300004 |
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| Carvalho,Daniel D.C.; Oliveira,Denilson F.; Corrêa,Rogério S. B.; Campos,Vicente P.; Guimarães,Renato M.; Coimbra,João L.. |
| To contribute for the development of environmental friendly methods for weed control, a selection of rhizobacteria able to produce phytotoxic substances was carried out. Initially, 35 strains previously isolated from plants in the south of Minas Gerais State (Brazil) were grown in tryptic soy broth. After removal of bacterial cells, the resulting liquids were freeze-dried and extracted with methanol/ethyl acetate (1:1). The extracts were concentrated under vacuum and dissolved in water to be submitted to a lettuce (Lactuca sativa L.) seed assay. Metabolites produced by five strains reduced the number of normal seedlings to values statistically bellow the one observed for the negative control, being the most expressive results obtained with Bacillus cereus... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacillus cereus; Bioherbicide; Lactuca sativa; Phytotoxin; Rhizobacteria; Brachiaria decumbens. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000400032 |
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