1
artículo
Publicado 2009
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Enlace
Various doses (0-20 kGy) of gamma radiation have been applied to samples of maca (Lepidium meyenii walp) flour, yellow, white and purple ecotypes, to decontaminate them. The gamma radiation dose required to eliminate the aerobic mesophiles was 12-15 kGy while it was necessary to applied 1-8 kGy to kill fungi, depending on the ecotype of Maca. We have determined the antioxidant activity of the irradiated samples by the method of neutralization of DPPH radical. IC50 values of the studied samples indicate that gamma radiation does not substantially alter the antioxidant activity of aqueous extracts of maca yellow, white and purple. In contrast, the antioxidant activity of hydroalcoholic extracts of irradiated maca yellow decrease sharply, but not the other ecotypes.
2
artículo
Publicado 2009
Enlace
Enlace
Various doses (0-20 kGy) of gamma radiation have been applied to samples of maca (Lepidium meyenii walp) flour, yellow, white and purple ecotypes, to decontaminate them. The gamma radiation dose required to eliminate the aerobic mesophiles was 12-15 kGy while it was necessary to applied 1-8 kGy to kill fungi, depending on the ecotype of Maca. We have determined the antioxidant activity of the irradiated samples by the method of neutralization of DPPH radical. IC50 values of the studied samples indicate that gamma radiation does not substantially alter the antioxidant activity of aqueous extracts of maca yellow, white and purple. In contrast, the antioxidant activity of hydroalcoholic extracts of irradiated maca yellow decrease sharply, but not the other ecotypes.
3
artículo
Publicado 2010
Enlace
Enlace
The physicochemical properties (antioxidant activity, total polyphenols and tannins contents) of tara extracts have been obtained. Samples were taken from the pod of tara (powder, fiber, seed coat and the inside of the seed) by maceration and Soxhlet extraction. All extracts have high antioxidant activity with an IC50 between 10 and 121 µg/mL. The total polyphenol content varies between 40 and 150 mg GAE/g of sample and the tannins content varies between 22 and 80%.
4
artículo
Publicado 2010
Enlace
Enlace
The physicochemical properties (antioxidant activity, total polyphenols and tannins contents) of tara extracts have been obtained. Samples were taken from the pod of tara (powder, fiber, seed coat and the inside of the seed) by maceration and Soxhlet extraction. All extracts have high antioxidant activity with an IC50 between 10 and 121 µg/mL. The total polyphenol content varies between 40 and 150 mg GAE/g of sample and the tannins content varies between 22 and 80%.
5
artículo
Publicado 2013
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La presente investigación describe la epidemiología de la diabetes mellitus insulinodependiente (Tipo I) en la población peruana, a través de 3 registros que tomaron como estudio al grupo etáreo menor de 15 años de la provincia de Lima, Cuzco y San Martín queen conjunto representan el 28% de la población peruana menor de 15 años. La fuente primaria de datos fueron los casos ocurridos en 25 hospitales entre 1980-1988, siendo los criterios de selección: haber sido diagnosticado de diabetes (OMS), haber tenido menos de 15 años de edad al diagnóstico, estar en insulino terapia y ser residente de su ciudad. El número de casos encontrados fueron 55, de los cuales 22 tuvieron menos de 15 años en 1988, con una prevalencia de 0.94/100,000 y una incidencia anual de 0.6/100.000. La fuente secundaria de datos fue la Asociación Peruana de Diabetes con 90% de validación de los casos re...
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