http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
문동철(Dong Cheul Moon),이정희(Jeong Hee Lee),이용문(Yong Moon Lee) 대한약학회 1992 약학회지 Vol.36 No.3
A simple dignostic method using Fast Atom Bombardment mass spectrometry was applied to the characterization of green tea flavonols from the eluates of Sepahadex LH-20 column chromatography. From the ethyl acetate extracts, crude mixture of flavonol fraction(Fr.1~4) were separated by the stepwise gradient elution with 30, 45, and 60% aqueous acetone. Procyanidine B analogues were found to be typical constituents of Fr. 1. Main components of Fr. 2 were catechins and gallo-catechins. Fr. 3 contained mainly ester type compounds, catechin-gallates, gallocatechin-gallates with their analogues. Fr. 4 was contaminated with some phthalate esters.
고속액체크로마토그라피에 의한 프로스타글란딘류의 고감도 형광 분석법
이용문(Yong Moon Lee),문동철(Dong Cheul Moon) 대한약학회 1992 약학회지 Vol.36 No.5
The Prostaglandins were derivatized rapidly with monodansyl cadaverine as a fluorophore in mild conditions. The carboxylic moiety of prostaglandins was activated with diethyl phosphorocyanidate and successively coupled with fluorophore in dimethylformamide at room temperature. The labeling yield was reached about 95% at 15 min using arachidic acid (C20 : 0) as a test sample. This derivative showed constant fluorescent intensity at 4oC for 180 days. The derivatives of prostaglandins were shown high solvent selectivity with tetrahydrofuran in reversed-phase column. therefore, these derivatives could be successfully separated on YMC pack A-212(S-5 120A C8) column in tetrahydrofuran-based eluents. The detection limits of these derivatives was ca. 500 fmol and determination limits was ca. 5 pmol as injected amount in fluorescent detection (lambdaex. 340nm, lambaem. 520nm). In this method, the ranges of recovery and coefficient of variation were 93.6~102.7% and 4.3~5.8%, respectively.
Monodansyl Cadaverine유도체화된 유리지방산류의 H2O2-Bis(2,4,6-trichlorophenyl) Oxalate에 의한 고속액체크로마토그라피
이용문(Yong Moon Lee),문동철(Dong Cheul Moon) 대한약학회 1993 약학회지 Vol.37 No.4
The sensitive detection of free fatty acids was investigated by using H2O2-bis(2,4,6-trichlorophenyl) oxalate chemiluminescence system after monodansyl cadaverine labeling. Because dansyl moiety is well excited by this chemiluminescence system, monodansyl cadaverine was a prominent reagent to this system for the determination of free fatty acids. The eluent of 50mM tris-HCl buffer (pH 7.7)-acetonitrile (1 : 4, v/v) was run through TSK gel ODS 80 TM column. The reagent solutions were mixed with the eluent containing the monodansyl cadaverine derivative of fatty acids from the column. By this system, linolic acid was detected 50fmol by injected amount.
모세관 전기영동법을 이용한 제제중의 수용성 비타민 분석
이종진(Jong Jin Lee),문동철(Dong Cheul Moon),이공주(Kong Joo Lee) 대한약학회 1994 약학회지 Vol.38 No.1
All analytical method using capillary electrophoresis (CE) was developed for quantitation of water soluble vitamin contents in various vitamin products. The method includes the optimization of separation of 11 water soluble vitamins changing the micellar concentration and pH of running buffer, applied voltage and sample preparation. Best resolution was obtained with 25mM phosphate buffer (pH=8.0) containing 50mM sodium dodecyl sulphate (SDS) as micellar phase. At optimum condition, water soluble vitamins were determined in orange juice and vitamin products such as vitamin C pulvis, vitamin injection, coated multivitamin tablet. The quantitative analysis of water soluble vitamins with CE was suitable for quality control of pharmaceutical products with sound reproducibility.
유지상(Ji Sang Yoo),문동철(Dong Cheul Moon),홍성화(Sung Hwa Hong),한건(Kun Han),김박광(Bak Kwang Kim) 대한약학회 1989 약학회지 Vol.33 No.3
A gas-chromatographic determination method of thiamin which use a quantitative cleavage of thiamin to 4-methyl-5-(2-hydroxyethyl)thiazol[I] and solvent extraction of the analyte prior to GC injection was modified. A column chromatographic procedure using a reversed phase, high capacity solid phase cartridge was applied to the clean-up of the analyte. Thiazol derivative[I] was quantitatively recovered upon the column method. Acetanilide, an internal standard, has a good recovery through the analytical procedure. The method has analytical precision of 2% or less in the coefficient of variation.
고속원자충격질량분석법을 이용한 Thromboxane $B_2$ 분석
장석윤,김정훈,이용문,장성기,문동철,Jang, Suk-Yoon,Kim, Jung-Hoon,Lee, Yong-Moon,Jang, Seung-Ki,Moon, Dong-Cheul 한국분석과학회 1993 분석과학 Vol.6 No.4
고속원소충격질량분석법을 이용하여 thromboxane $B_2$의 극미량분석법을 개발하였다. static FAB mode에서 decosanoic acid를 내부표준물로 이용하여 검출한계 5ng의 분석법을 확립하였고, CF-FAB mode에서 고안한 시료도입장치를 사용하여 thromboxane $B_2$의 측정감도, 재현성 등 정량분석에 미치는 용매조성, 용매의 유속 등 분석파라미터들을 조사하였다. CF-FAB mode에서 0.75% glycerol(in EtOH, v/v)을 eluent 용매로, 유속을 $3.7{\mu}l/min.$로 하여 분석조건을 최적화하고 TIC법과 SIM 검출법을 이용하여 정량한계 각각 500pg 및 10pg인 극미량분석법을 확립하였다. Analytical methods of thromboxane $B_2(TXB_2)$ using various techniques of Fast Atom Bombardment mass spectrometry (FAB MS) were studied, static FAB condition was investigated to obtain linear response curve using docosanoic acid as a internal standard. For maximum sensitivity, a continuos-flow(CF-) FAB MS by selected-ion monitoring(SIM) with devised sample introduction system, has been developed to quantiate thromboxane $B_2$ in biological sample. Instrumental parameters affecting sensitivity, reproducibility has been studied. The method has been optimized with respect to the eluent, 0.75% glycerol(in EtOH v/v) and flow rate of $3.7{\mu}l/min.$ Under the condition, detection limits were below 10pg in SIM mode and a good linear relationship between dose and response was achieved.