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| Ferreira,Paulo M.P.; Carvalho,Ana F.U.; Farias,Davi F.; Cariolano,Nara G.; Melo,Vânia M.M.; Queiroz,Maria G.R.; Martins,Alice M.C.; Machado-Neto,Joaquim G.. |
| In this work, biological effects of the water extract of Moringa oleifera seeds (WEMOS) were assessed on eggs and 3rd instar larvae of Aedes aegypti and on its toxicity upon laboratory animals (Daphnia magna, mice and rats). Crude WEMOS showed a LC50 value of 1260µg/mL, causing 99.2 ± 2.9% larvae mortality within 24 h at 5200µg/mL, though this larvicidal activity has been lost completely at 80ºC/10 min. WEMOS did not demonstrate capacity to prevent egg hatching. After extensive dialyses of the crude WEMOS into watersoluble dialyzable (DF) and nondyalizable (NDF) fractions, only DF maintained its efficacy to kill larvae. Acute toxicity evaluations on daphnids (EC50 of 188.7µg/mL) and mice (LD50 of 446.5 mg/kg body weight) pointed out to low toxicity.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aedes aegypti; Daphnia magna; Larvicidal activity; Moringa oleifera seeds; Toxicity. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652009000200007 |
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| Lima-Filho,José Vitor M.; Carvalho,Ana F.F.U.; Freitas,Sissi M.; Melo,Vânia M.M.. |
| Hexane, chloroform and ethanol extracts of six marine macroalgae (Rhodophyta and Chlorophyta) from North Ceará coast (Northeast Brazil) were evaluated for antibacterial activity by the single disk method. Best results were shown by the hexane extracts of Amansia multifida against enteric Gram-negative strains such as Enterobacter aerogenes, Klebsiella pneumoniae, Pseudomonas aeruginosa, Salmonella typhi, S. cholerae-suis, Serratia marcescens, Vibrio cholerae and the Gram-positive bacteria Bacillus subtilis and Staphylococcus aureus. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antibacterial activity; Algae; Lipid-soluble extracts. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822002000400006 |
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