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KMID : 0903520060490010043
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Journal of the Korean Society of Agricultural Chemistry and Biotechnology
2006 Volume.49 No. 1 p.43 ~ p.48
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Physiological Activities According to Cultivars and Parts of Ulsan Pear
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Choi Jeong-Hwan
Lee Eun-Young
Kim Jong-Su
Choi Gil-Bae
Jung Su-Geun
Hahm Yoo-Sik
Seo Dong-Cheol
Heo Jong-Soo
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Abstract
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This study was performed to confirm physiological activities according to cultivars and parts of Ulsan pear (wonhwang, pungsu, whangkeum, whasan and shingo). Total contents of phenolic compounds from peel, pulpy substance and core were 699.3-800.6, 51.5-112.5 and 254.0-401.5 mg/100 g as tannic acid equivalent, respectively. There were difference contents by cultivars, and peel and core of shingo and pulpy substance of wonhwang showed high contents, respectively. Total flavonoid contents of peel, pulpy substance and core were 125.2-164.2, 25.9-35.9 and 45.1-60.0 mg/ 100g, respectively and those of shingo cultivar showed comparatively high. Electron donating ability was in the order of peel (66.1-90.7%), core (48.5-82.8%) and pulpy substance (24.9-58.2%), and whasan cultivar showed comparatively low. Nitrite scavenging activity was in the order of peel (58.2-100.8%), core (59.5-86.2%), pulpy substance (39.9-82.5%). There were little difference by cultivars of core but peel and pulpy substance of shingo cultivar showed comparatively low nitrite scavenging activity. And as the concentration of each extract increased, nitrite scavenging activity increased. Xanthine oxidase inhibition rate was in the order of peel (14.1-75.4%), core (5.3-71.8%), pulpy substance (2.2-67.5%). And there little difference by cultivars and which was increased as the concentration of each extract increased.
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KEYWORD
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phenolic compounds, total flavonoid, electron donating ability, nitrite scavenging activity, xanthine oxidase inhibition
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