감잎차 찻물의 항산화효과, 비타민C와 아미노산 함량
Antioxidant Activity, Ascorbic acid and Amino Acid Content of Persimmon(Diospyros kaki, Thunb.) Leaf Tea Solution
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초록
Persimmon leaf tea is one of the oldest beverages known to Korean. Thus, the contents of vitamin C, sugar, total phenols and total amino acid, and scavenging activities of reactive oxygen species of PTS-1(control ; persimmon leaf tea solution of persimmon leaf tea prepared by general method with different temperatures), PTS-2(persimmon leaf tea solution of persimmon leaf tea prepared by different temperatures and ultrasonic treatment, and PTS-3(persimmon leaf tea solution of persimmon leaf tea prepared by natural fermentation), were studied. The highest content of vitamin C(252.5 mg/100g) in PTS-2 tea solution was observed. The levels of fructose and sucrose in all samples ranged from 89 to 167 ppm, and from 2 to 19 ppm, respectively. No great difference occurred among samples in an effective DPPH∙ scavenging activities and PTS-1 sample showed the hight scavenging activities of 85.8% by hydroxyl radical scavenging activities method. The highest contents of total phenols and total amino acid were 311.58 μg/g for PTS-1, respectively.
Abstract
Persimmon leaf tea is one of the oldest beverages known to Korean. Thus, the contents of vitamin C, sugar, total phenols and total amino acid, and scavenging activities of reactive oxygen species of PTS-1(control ; persimmon leaf tea solution of persimmon leaf tea prepared by general method with different temperatures), PTS-2(persimmon leaf tea solution of persimmon leaf tea prepared by different temperatures and ultrasonic treatment, and PTS-3(persimmon leaf tea solution of persimmon leaf tea prepared by natural fermentation), were studied. The highest content of vitamin C(252.5 mg/100g) in PTS-2 tea solution was observed. The levels of fructose and sucrose in all samples ranged from 89 to 167 ppm, and from 2 to 19 ppm, respectively. No great difference occurred among samples in an effective DPPH∙ scavenging activities and PTS-1 sample showed the hight scavenging activities of 85.8% by hydroxyl radical scavenging activities method. The highest contents of total phenols and total amino acid were 311.58 μg/g for PTS-1, respectively.
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