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- 주제어 : 7-ketositosterol (검색결과 3 건)
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최은희,박희정,吴倩,정인식,김지영,백남인 한국응용생명화학회 2010 Journal of Applied Biological Chemistry (J. Appl. Vol.53 No.2
The seed of cowpea (Vigna sinensis K.) was extracted with 80% aqueous methanol (MeOH). And the concentrated extract was partitioned with ethyl acetate (EtOAc), n-butanol (n-BuOH) and H2O, successively. The repeated silica gel and octadecyl silica gel (ODS) column chromatographic separations for the EtOAc and n-BuOH fractions led to isolation of four sterols. And the chemical structures of the compounds were determined as a mixture of stigmasterol and β-sitosterol with the ratio of 4 to 3 (1), 7-ketositosterol (2), and stigmasterol 3-O-β-D-glucopyranoside (3) from the interpretation of spectroscopic data including nuclear magnetic resonance (NMR) spectrum metric, mass (MS) spectrum metric and infrared (IR) spectroscope. This study reports the first isolation of β-sitosterol, 7-ketositosterol, and stigmasterol 3-O-β-D-glucopyranoside from the seed of Vigna sinensis K. In addition, compound 2, 7-ketositosterol, is rarely occurred in natural source including plant. 동부를 80% MeOH로 추출하고, 얻어진 추출물을 EtOAc, n-BuOH 및 H2O로 용매 분획 하였다. 이 중 EtOAc과 n-BuOH 분획으로부터 silica gel과 octadecyl silica gel(ODS) columnchromatography를 반복하여 4종의 sterol 화합물을 분리, 정제하였다. 각 화합물의 화학구조는 NMR, MS 및 IR 등의 spectrum data를 해석하여, stigmasterol(1a), β-sitosterol(1b), 7-ketositosterol(2) 및 stigmasterol 3-O-β-D-glucopyranoside(3)로 동정하였다. 화합물 1b, 2와 3은 동부에서 처음 분리되었다.
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Isolation of Sterols from Cowpea (Vigna sinensis) Seeds and Their Promotion Activity on HO-1
( En Ji Cui ),( Ji Hae Park ),( Hee Jung Park ),( In Sik Chung ),( Ji Young Kim ),( Seung Woo Yeon ),( Nam In Baek ) 한국응용생명화학회 2011 Applied Biological Chemistry (Appl Biol Chem) Vol.54 No.3
Cowpea (Vigna sinensis K.) seeds were extracted with 80% aqueous methanol. Concentrated extracts were partitioned with ethyl acetate, butanol, and H2O, successively. The repeated silica gel and octadecyl silica gel (ODS) column chromatographic separations for the butanol fraction led to isolation of four sterols, whose chemical structures were determined as 7β-hydroxysitosterol (1), 7α-hydroxysitosterol (2), 7-ketositosterol (3), and stigmasterol 3-O-β -D-glucopyranoside (4) from the interpretation of spectroscopic data including NMR, mass spectroscopy, and infrared spectroscopy (IR). This paper reports the first isolation of compounds 1 and 2 from V. sinensis seeds. All compounds were evaluated for the effect on heme oxygenase-1 (HO-1) expression, which is considered to be an antioxidant enzyme that catabolizes heme into carbon monoxide, free iron, and biliverdin. All sterols increased the expression of HO-1 in HepG2 cells.
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Sterols from Lindera glauca Blume Stem Wood
( Gyu Won Huh ),( Ji Hae Park ),( Sabina Shrestha ),( Youn Hyung Lee ),( Eun Mi Ahn ),( Hee Cheol Kang ),( Nam In Baek ) 한국응용생명화학회 2011 Journal of Applied Biological Chemistry (J. Appl. Vol.54 No.4
Chipped stem wood from Lindera glauca was extracted repeatedly with 80% aqueous methanol at room temperature, and the concentrated methanolic extract was successively partitioned with ethyl acetate (EtOAc), n-butyl alcohol, and H2O. From the EtOAc fraction, four sterols were isolated through a repeated silica gel and octadecyl silica gel column chromatography. The chemical structures of the sterols were elucidated as β-sitosterol (1), 7-ketositosterol (2), 7β-hydroxysitosterol (3), and daucosterol (4). Among them, compounds 2 and 3 were isolated for the first time from the stem woods of this plant.
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