Bidens pilosa L. and Bidens pilosa variedad minor of Asteraceae family, are known by the common name of 'amor seco'. The biological assays were started with bioassay of Artemia salina Leach, the Biden species showed both, in aqueous and ethanolic extracts bioactivity. In these species it was carried out the pharmacognosy screening that featured the chemical principies of samples. It was identified carbohidrates, condensed tannins, phenolic compounds, flavonoids, steroids and sesquiterpenic lactons. Through the antiulcerous activity assay it was verified the effective dose for all the samples. The LD50 was determined. The results showed 7494 mglkg, for both species. Bidens pilosa L and Bidens pilosa var. minor, showed practically no toxicity.

Bidens pilosa L. and Bidens pilosa variedad minor of Asteraceae family, are known by the common name of 'amor seco'. The biological assays were started with bioassay of Artemia salina Leach, the Biden species showed both, in aqueous and ethanolic extracts bioactivity. In these species it was carried out the pharmacognosy screening that featured the chemical principies of samples. It was identified carbohidrates, condensed tannins, phenolic compounds, flavonoids, steroids and sesquiterpenic lactons. Through the antiulcerous activity assay it was verified the effective dose for all the samples. The LD50 was determined. The results showed 7494 mglkg, for both species. Bidens pilosa L and Bidens pilosa var. minor, showed practically no toxicity.

El fruto del Vaccinium floribundum Kunth “pushgay”, integra al grupo de los berries nativos, el cual presenta una gran cantidad de antioxidantes, mucho mayor que los arándanos que actualmente se exportan a diferentes países. El objetivo de este estudio fue la determinación de los parámetros fisicoquímicos y la capacidad antioxidante in vitro del extracto vegetal del Vaccinium floribundum Kunth. Se prepararon extractos por maceración a partir de frutos liofilizados, usando como solvente etanol al 50 %, 70 % y 96 %. Los extractos presentaron valores similares de densidad relativa, sólidos totales, índice de refracción, grados Brix y pH. El tamizaje fitoquímico evidenció la presencia de carbohidratos, azúcares reductores, taninos, compuestos amino y heterósidos, destacando los compuestos fenólicos y flavonoides de relevante capacidad antioxidante. El extracto al 50 % prese...