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| Almeida,Tânia Santos de; Araújo,Maria Eduarda Machado; Rodríguez,Lucía González; Júlio,Ana; Mendes,Beatriz Garcia; Santos,Rui Miguel Borges dos; Simões,José Artur Martinho. |
| The influence of common tea preparation procedures (temperature, infusion time, consumption time interval and tea bag/loose-leaf) and the type of water used, on the total phenolic content (TPC), the radical scavenging activity and the α-glucosidase inhibitory activity were assessed. Higher TPC and antioxidant activity were obtained when using lower mineralized waters. Tea bags also evidenced higher antioxidant activity than loose-leaf samples. Under the same conditions (90 ºC and five minutes of infusion time) green tea contains almost twice the quantity of polyphenols and the free radical scavenging ability of black tea. In the α-glucosidase assay all infusions were active (97-100 %). Furthermore, HPLC allowed to identify some of the polyphenols present... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Black tea; Green tea; Antioxidant activity; Α-Glucosidase activity; Water mineralization. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502019000100529 |
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