http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
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.
Short Communication: Bioactive Materials : Phytosterols from the Rice (Oryza sativa) Bran
( Ye Jin Jung ),( Ji Hae Park ),( Sabina Shrestha ),( Myoung Chong Song ),( Sueng Mok Cho ),( Chang Ho Lee ),( Dae Seok Han ),( Nam In Baek ) 한국응용생명화학회(구 한국농화학회) 2014 Journal of Applied Biological Chemistry (J. Appl. Vol.57 No.2
Three phytosterols of rare occurrence, schleicheol 2 (1), 7β-hydroxysitosterol (2), and 7α-hydroxysitosterol (3), were isolated from the n-hexane fraction of rice (Oryza sativa) bran, for the first time. Some nuclear magnetic resonance (NMR) assignments in the literatures are inaccurate. This study employed twodimensional NMR experiments to identify exact peak assignments.