Consulta: creatorFacets:"Luna,Jorge Antonio Gómez"
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Data/hora: 02/06/2024 03:58:26

Correlation between antioxidant activity and coffee beverage quality by Electron Spin Resonance Spectroscopic
Provedor de dados: Ciência e Agrotecnologia
Autores: Barbosa,Jeam Haroldo Oliveira; Luna,Jorge Antonio Gómez; Kinoshita,Angela Mitie Otta; Baffa Filho,Oswaldo.
Brazil is the largest producer of coffee in the world and coffee prices are directly linked to grain quality. In this work, the antioxidant activity of coffee was related to its quality through Electron Spin Resonance Spectroscopy (ESR), as an attempt to establish a non-subjective method to classify the grain quality. For that purpose, the IC50 and temporal monitoring of its non-oxidized fraction were determined for three bean qualities: Soft (High), Hard (Medium) and Rio (Low). Methanolic solution of 2,2-difenil-1-picril-hidrazila (DPPH), that has a stable radical and a JEOL FA-200 (X-Band) spectrometer were used for these tests. The temporal monitoring of reaction between radical and coffee was performed. The rate of reduced or of antioxidated radicals...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Classify; Method; IC50.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000600002