발효한 더덕 차의 열처리에 의한 항산화 활성 및 품질특성 = Antioxidant Activities and Quality Characteristics of Fermented Codonopsis lanceolata Tea according to Heating Processes

다국어 초록 (Multilingual Abstract)

This study examines the antioxidant activities and quality characteristics of fermented Codonopsis lanceolata tea according to the heating temperature and time. The browning, turbidity, reducing sugar, total polyphenol and total flavonoid contents all increased with increasing of heating temperature and time, but the pH decreased within the range of error. In particular, the total polyphenol contents of the heat treatment sample for 15 minutes at $200^{\circ}C$ are increased to about 4.5 times of 713.71mg/100ml as compared to the control group. From the results of the antioxidant activity test, as both the heating temperature and time increases, the antioxidant activity was increased for DPPH radical-scavenging activity, FRAP and reducing its power. In the case of the samples treated with heat for 15 minutes at $200^{\circ}C$ in the DPPH radical scavenging ability, it increased about twice more than the 45.17% control plot at 85.40%, and the reducing power and FRAP were increased to approximately two or three times more than the control group. According to the results for sensory test of fermented C. lanceolata tea according to heating temperature and time, the preference was confirmed as high by heat treatment due to increased temperature and time. Heat treatment process of C. lanceolata during the process is determined by the conditions required for high value-added products through the improvements of the taste and functionality of C. lanceolata.

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