• Title/Summary/Keyword: Natural

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Minor Constituents from the Roots of Sophora flavescens

  • Kim, Ju-Sun;Han, Sang-Jun;Byun, Ji-Hye;Xu, Yong-Nan;Yoo, Sang-Woo;Kang, Sam-Sik;Son, Kun-Ho;Chang, Hyeun-Wook;Kim, Hyun-Pyo
    • Natural Product Sciences
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    • 제7권1호
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    • pp.5-8
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    • 2001
  • Lupenone, hexadecyl ferulate, (-)-sophocarpine and three isoflavonoids such as genistein, 3'-methoxydaidzein and calycosin were isolated from the roots of Sophora flavescens.

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Aldose Reductase Inhibitory Activity of Methanol Extracts from the Korean Plants

  • Jung, Sang-Hoon;Lim, Soon-Sung;Lee, Sang-Hyun;Lee, Yeon-Sil;Shin, Kuk-Hyun;Kim, Yeong-Shik
    • Natural Product Sciences
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    • 제9권1호
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    • pp.34-37
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    • 2003
  • We examined methanol extracts prepared from the Korean plants for their inhibitory effects on rat lens aldose reductase (RLAR) activity in vitro. Among 41 plant extracts, the extracts of Lagerstroemia indica, Punica granatum, Eurya japonica, Liquidambar styraciflua, and Vitis coignetiae exhibited highest inhibitory potency, even more potent than tetramethylene glutaric acid (TMG), known as one of typical aldose reductase inhibitors $(IC_{50}\;value,\;0.51\;{\mu}g/ml)$. Especially, the extract of Lagerstroemia indica (Lythraceae), exhibited the most inhibitory potency $(IC_{50}\;value,\;0.069\;{\mu}/ml)$ on RLAR.

Lignans from the Roots of Berberis amurensis

  • Park, Hyun-Bong;Lee, Kyu-Ha;Kim, Ki-Hyun;Lee, Il-Kyun;Noh, Hyung-Jun;Choi, Sang-Un;Lee, Kang-Ro
    • Natural Product Sciences
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    • 제15권1호
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    • pp.17-21
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    • 2009
  • Column chromatographic separation of the alcoholic extract from the roots of Berberis amurensis yielded eight phenolic constituents including six lignans, hanultarin (1), (-)-secoisolariciresinol (3), (+)-lyoniresinol (5), (+)-syringaresinol (6), (+)-syringaresinol-O-$\beta$-D-glucopyranoside (7), liriodendrin (8), and two phenylpropanoids, 4-glucosyloxy-3-methoxyphenyl trans-propenoic ethyl ester (2), trans-ferulic acid (4). The structures were determined on the basis of NMR spectroscopic data. All isolated compounds(1-8) were reported for the first time from this source. Compound 1 exhibited moderate cytotoxicity against four human cancer cell lines in vitro using sulforhodamin B bioassay.

농촌 마을내부 소하천의 하안재료에 대한 주민 선호도에 관한 연구 (Residents'prefrences for Rural stream bank materials)

  • 이춘석;류남형
    • 농촌계획
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    • 제3권2호
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    • pp.81-89
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    • 1997
  • Still today, many streams are channelized and embanked in Korea. On the other hand, some urban streams are being restored to their natural shapes by landscape planners. It would be better to improve rural streams in a way that would not require restoration in later days. Then, one important question is what kind of embankments the residents prefer for what reasons. Five simulated photos showing from very natural to artificial embankments were used in surveying 90 residents of three villages. Major findings are ; 1. Residents regard safety(from flooding) is the most critical factor to be considered in selection of stream bank materials. 2. They think ideal materials are natural stones or concrete blocks as they look tidy. Concrete retaining walls or vegetated natural slopes are not regarded good. 3. The most preferred material is concrete retaining wall, and the least preferred is vegetated natural slope. They prefer concrete retaining wall which they do not think an ideal material, because it will make a safe bank. 4. Natural stone bank is most preferred for its apperance, and vegetated natural slpoe is most disliked as it may collapse and as it does not look clean.

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Gene Analysis of Y chromosome in Humans and Apes

  • Hong, Kyoung-Won;Huh, Jae-Won;Kim, Myung-Sook;Kim, Tae-Hyung;Yi, Joo-Mi;Takenaka, Osamu;Lee, Won-Ho;Kim, Heui-Soo
    • 한국생명과학회:학술대회논문집
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    • 한국생명과학회 2002년도 제37회 국제학술심포지움 및 추계학술대회
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    • pp.94-94
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    • 2002
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