Item request has been placed! ×
Item request cannot be made. ×
loading  Processing Request

Antioxidant activity and GC-MS profile of Conyza bonariensis L. leaves extract and fractions.

Item request has been placed! ×
Item request cannot be made. ×
loading   Processing Request
اقرأ على الانترنت اقرأ أكثر حفظ في قائمتي
  • معلومة اضافية
    • Alternate Title:
      Actividad antioxidante y perfil CG-EM del extracto y fracciones de hojas de Conyza bonariensis L. (Spanish)
    • نبذة مختصرة :
      The 2,2-diphenyl-1-picrylhydrazyl (DPPH), ferric reducing power (FRAP), and semivolatile compounds of Conyza bonariensis L. leave extract and fractions are discussed. A methanolic crude extract was obtained through maceration, and subsequently, n-hexane, chloroform, and ethyl acetate fractions were collected using a solvent-solvent partition. Total phenols, flavonoids, and antioxidant activity assays were performed in an ultraviolet-visible (UV-Vis) spectrophotometer, and the results were expressed as Gallic Acid, Quercetin, and Trolox equivalents, respectively. The findings achieved indicate that ethyl acetate fraction showed the highest DPPH radical scavenging capacity (90.69±3.16%) at 500 µg mL-1, and reduced the ferric tripyridyltriazine complex (Fe3+-TPTZ) with values between 19.68 and 2,355.37 mg Trolox equivalent (TE) g-1. It was identified 28 phytoconstituents through Gas chromatography-mass spectrometry (GC-MS). The scavenging activity of ethyl acetate fraction could be correlated mostly to the presence of eugenol, trans-isoeugenol, lucenin-2, methyl salicylate, and syringic acid. This study reveals that the ethyl acetate fraction could be used as a good source of antioxidants for health benefits. [ABSTRACT FROM AUTHOR]
    • نبذة مختصرة :
      El 2,2-difenil-1-picrilhidrazil (DPPH), el poder reductor férrico (FRAP) y los compuestos semivolátiles del extracto y fracciones de Conyza bonariensis L. son discutidos. Se obtuvo un extracto crudo en metanol mediante maceración y posteriormente se recogieron fracciones de n-hexano, cloroformo y acetato de etilo usando partición disolvente-disolvente. Los ensayos de fenoles totales, flavonoides y actividad antioxidante se efectuaron en un espectrofotómetro (UV-Vis) y los resultados se expresaron como equivalentes de Ácido gálico, Quercetina y Trolox, respectivamente. Los resultados indican que la fracción en acetato de etilo mostró la mayor capacidad de eliminación del radical DPPH (90,69±3,16%) a 500 µg mL-1 y redujo el complejo de tripiridiltriazina férrico (Fe3+-TPTZ) con valores entre 19,68 y 2355,37 mg equivalente de Trolox (TE) g-1. Se identificaron 28 fitoconstituyentes a través del análisis de cromatografía de gases-espectrometría de masas (CG-EM). La actividad antioxidante presentada puede correlacionarse principalmente con la presencia de eugenol, trans-isoeugenol, lucenina-2, salicilato de metilo y ácido siríngico detectado. Este estudio muestra que la fracción de acetato de etilo podría ser utilizada como una buena fuente de antioxidantes para el beneficio de la salud humana. [ABSTRACT FROM AUTHOR]
    • نبذة مختصرة :
      Copyright of Revista Facultad Nacional de Agronomía Medellín is the property of Universidad Nacional de Colombia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)