Examinando por Autor "Aliaga Palomares, Ana María"

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    Estudio del extracto etanólico de los rizomas de Curcuma longa L. “Cúrcuma” y su actividad antioxidante
    (Universidad Privada Norbert Wiener, 2019-03-08) Aliaga Palomares, Ana María; Muñoz Suárez, Liliana Sofía; López Parra, Ronal Rosendo
    Objective: To determine the phytoconstituents present in the rhizome of Curcuma longa L. “turmeric” and its antioxidant activity. Materials and Methods: The study was quasi-experimental, descriptive, and cross-sectional. The study species was collected in the district of Kimbiri, Province of La Convención, Cusco. An ethanolic extraction of the dried turmeric rhizomes was carried out in order to perform the qualitative phytochemical analysis, following the methodology proposed by Olga Lock de Ugaz, to determine the phytoconstituents. Dilutions of the dry extract were prepared at concentrations of 5%, 10%, and 20%. Antioxidant activity was evaluated using the DPPH assay (1,1-diphenyl-2-picrylhydrazyl), and the absorption band was measured at 517 nm with a UV-Visible spectrophotometer. These results were analyzed with the statistical software IBM SPSS Statistics version 24.0 and Microsoft Excel 2016. Results: The presence of secondary metabolites such as phenolic compounds, flavonoids, quinones, and coumarins was determined. The antioxidant activity results are presented as the mean inhibition percentage of the ethanolic extract at 5%, 10%, and 20%, which were 81.552%, 82.077%, and 83.742%, respectively, compared with the standard sample of Vitamin C, which showed means corresponding to 5%, 10%, and 20% of 96.258%, 93.313%, and 84.110%, respectively. Conclusion: It was determined that the ethanolic extract of the rhizomes of Curcuma longa L. “turmeric” exhibits antioxidant activity comparable to that of Vitamin C and may be considered a source of natural antioxidants. This activity is attributed to the presence of phenolic compounds and flavonoids.