Phototoxic compounds and biological activity of extracts from Eupatorium morifolium Mill. (Asteraceae) (With 5 Tables) Compuestos fototóxicos y actividad biológica de los extractos de Eupatorium morifolium Mill. (Asteraceae) 57º ANIVERSARIO 57th ANNIVERSA

A Ab bs st tr ra ac ct t. Leaves of Eupatorium morifolium Mill. were analyzed for phototoxic compounds, and the toxicity of their hexane extract was evaluated against Bacillus subtilis. The phototoxic compounds were analyzed by TLC. In the plate, pale blue spots indicated the presence of these compounds. This was confirmed by the UV extract spectrum and the antibacterial activity against Bacillus subtilis. The biological activity of the leaf extracts (hexane, ethyl acetate or methanol) was also studied. The antiinflammatory activity was determined using the edema test on mouse ears, and the bactericide activity was assayed against Bacillus subtilis and Escherichia coli. A strong anti-inflammatory activity was shown by the leaf extracts. The ethyl acetate extract exhibited the strongest bactericide activity, followed by the methanol and hexane extracts. K Ke ey y w wo or rd ds s: : Asteraceae, phototoxic compounds, bactericide activity, 12-O-tetradecanoylphorbol-13-acetate (TPA)

a chromatographic study of flavonoids and fatty-acids of 4 caesalpinia species

A comparative study of the flavonoid chromatographic profiles and of the fatty acid composition of the seed oil was carried out in four species belonging to three different groups in the genus Caesalpinia. Both determinations (statiscally analyzed) gave concurrent results and the dendrograms obtained showed a closer relationship between Caesalpinia velutina Britton et Rose and C. platyloba S. Watson, from the Brasilettia group, than between these two species and C. cacalaco Humboldt et Bonpland (Russellodendron group) and C. hintonii Sandwith (Poincianella group)