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KMID : 1134820090380010001
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Journal of the Korean Society of Food Science and Nutrition
2009 Volume.38 No. 1 p.1 ~ p.8
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The Antioxidative Activities of Torreya nucifera Seed Extracts
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Jeon Ho-Sung
Lee Yang-Suk
Kim Nam-Woo
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Abstract
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This study was investigated to analyze the contents of flavonoid and polyphenol compounds, and inhibitory activities of tyrosinase and antioxidation to measure physiological effect of reflux water extraction (WE), reflux ethanol extraction (EE) and hot water extract under high pressure (HWE) of Torreya nucifera seed. HWE yields the highest contents of flavonoid compounds (176.34 mg/g) and polyphenol compounds (112.95 mg/g). The tyrosinase inhibitory rates were 5.62∼28.71% at 2.0 mg/mL and HWE showed the highest inhibition rate. The nitrite scavenging abilities of all extracts were over 90% at pH 1.2 and 3.0 at the concentration of 2.0 mg/mL. The superoxide dismutase (SOD)-like activities of HWE was the highest value of 33.58%. The electron donating abilities (EDA) were 66.46∼89.72% and HWE was the highest when the extracts were tested at 0.1 mg/mL. The EDA of all extracts were decreased with an increment of the extracts concentrations. The xanthine oxidase inhibitory rate of HWE was the highest value of 89.29% at the concentration of 2.0 mg/mL and the WE and
HWE were over 75% rate of xanthine oxidase inhibition at 0.5 mg/mL.
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KEYWORD
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Torreya nucifera seed, flavonoid, polyphenol, tyrosinase, nitrite scavenging, SOD, electron donating, xanthine oxidase
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