In Vitro Antioxidant Properties of Flavonoids and Polysaccharides Extract from Tobacco Nicotiana tabacum L. LeavesReportar como inadecuado




In Vitro Antioxidant Properties of Flavonoids and Polysaccharides Extract from Tobacco Nicotiana tabacum L. Leaves - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, China





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Abstract In the present study, antioxidant properties of flavonoids and polysaccharides from tobacco Nicotiana tabacum L. leaves were evaluated in several in vitro systems, e.g., scavenging activities on hydroxyl, superoxide anion, 1,1-diphenyl-2-picrylhydrazyl DPPH and 2,2-azino-bis3-ethylbenzthiazoline-6-sulphonic acid ABTS radicals, and reducing power. Flavonoids showed much better activity than polysaccharides in scavenging activities on free radicals. When compared to the positive control, ascorbic acid, both showed weaker antioxidant potential. However, flavonoids possessed comparable superoxide anion, DPPH and ABTS radical scavenging abilities to ascorbic acid at high concentration 600 μg-mL. Meanwhile, it was found that flavonoids had prominent effects on the reducing power, which was equivalent to ascorbic acid, and was significantly higher than polysaccharides. These results clearly indicate that flavonoids are effective in scavenging free radicals and have the potential to be powerful antioxidants. Thus, tobacco leaves could be considered as a potential source of natural antioxidants for food, pharmaceutical, cosmetics or nutraceutical industries. View Full-Text

Keywords: tobacco Nicotiana tabacum L. leaves; flavonoids; polysaccharides; reducing power tobacco Nicotiana tabacum L. leaves; flavonoids; polysaccharides; reducing power





Autor: Qiao-Mei Ru, Li-Juan Wang, Wei-Ming Li, Jing-Lu Wang and Yu-Ting Ding *

Fuente: http://mdpi.com/



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