Abstract

RAMOS-ESCUDERO, Fernando; MUNOZ, Ana María; ALVARADO-ORTIZ URETA, Carlos  and  YANEZ, Jaime A.. Anthocyanins, polyphenols, antioxidant activity of purple sachapapa (Dioscorea trifida L.) and evaluation of lipid peroxidation in human serum. Rev. Soc. Quím. Perú [online]. 2010, vol.76, n.1, pp.61-72. ISSN 1810-634X.

The total content of anthocyanins, total polyphenols were determined spectrometrically. The anti-oxidant activity of the Dioscorea trifida L extracted pigments was evaluated using different anti-oxidant assays including: free radical scavenging (DPPH^•, and ABTS^•+), as well as superoxide anion radical scavenging. The in vitro anti-oxidant activity of Dioscorea trifida L extracts against the lipidic peroxidation in human serum was evaluated at different concentrations. The largest inhibition percentage (66,37%) was achieved at the extract concentration of Dioscorea trifida Lof 2,06 mg/mL. The inhibition coefficient to 50% (IC50) was 1,824 mg/mL. The pigments extracted from purple sachapapa are natural colorants that exhibit excellent anti-oxidant activity and offer the potential to be beneficial for health and that could be applied in the food and health science fields.

Keywords : Dioscorea trifida L; anthocyanins; polyphenols; anti-oxidant activity; malondialdehyde; human serum.

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