This study was carried out to develop substitute teas using extracts of Zingiber officinale Roscoe, commonly known as ginger. The antioxidant activities of aged and fermented samples were compared using the total phenol and flavonoid contents; oxygen radical absorbance capacity (ORAC) assay; and superoxide, ABTS, and DPPH radical scavenging activities. The content of 6-gingerol, a bioactive component in ginger, and 6-shogaol, also a major valuable ingredient, in all fermented gingers decreased and increased, respectively. The total phenolic and flavonoid contents of teas with fermented ginger were similar. On the other hand, the ORAC and superoxide radical scavenging activity of the teas were 10-30% higher in the fermented samples than in the aged samples. The DPPH and ABTS radical scavenging activities were 40.66-48.54% and 45.82-52.32%, respectively. Moreover, the alcohol dehydrogenase and acetaldehyde dehydrogenase activities were significantly higher than the control (p<0.05). In conclusion, this paper highlights the potential of extracts of fermented and aged ginger as functional substitute tea materials.
서 론
재료 및 방법
결과 및 고찰