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아미노산 Phenylthiohydantoin 유도체를 키랄 고정상으로 한 GC에 의한 아미노산 광학 이성질체의 상호분리
박만기,양정선,고창범,이미영,Park, Man-Ki,Yang, Jeong-Seen,Ko, Chang-Bum,Lee, Mi-Yung 대한약학회 1988 약학회지 Vol.32 No.3
The resolution of five amino acids derivatives by gas chromatography on phenylthiohydantoin derivatives as chiral stastionary phase was investigated. (S)-5-isopropyl, isobutyl, (sec)-butyl and benzoyl derivatives of $N^3-phenyl-2-thiohydantoin$ were synthesized from L-valine, L-leucine, L-isoleucine and L-phenylalanine, respectively. The phases were employed at several column temperatures ($140^{\circ}C{\sim}210^{\circ}C$). The separation factors were compared with each stationary phase with varying R groups. The possible mechanism of chiral recognition was investigated by NMR technique.
GC/FPD를 利用한 ${\beta}$-락탐系 抗生物質의 分析(II)
박만기,조영현,양정선,박정일,Park, Man-Ki,Cho, Yung-Hyun,Yang, Jeong-Seon,Park, Jeong-Hil 대한약학회 1984 약학회지 Vol.28 No.4
For gas chromatographic determination with the sulfur-specific flame photometric detector, nine ${\beta}$-lactam antibiotics without ${\alpha}$-amino group were esterified with borontrifluoride-methanol complex and then N-benzoylated with benzoyl chloride. The gas chromatographic separation of these products was successfully carried out on various silicon polymers (OV-1, OV-101, OV-17, OV-225, and QF-1) coated on the acid washed, silanized diatomite. The structure of the esterified and N-benzoylated product was confirmed by mass spectromer.
NMR Spectroscopy에 의한 Sulfonamide의 정량(定量)
박만기,김성경,이숙연,Park, Man-Ki,Kim, Sung-Kyeong,Lee, Sook-Yeon 대한약학회 1984 약학회지 Vol.28 No.5
A rapid and accurate NMR procedure for the analysis of a mixture of sulfametrol, sulfalene and sulfameter in $CDCl_3$ and $dimethylsulfoxide-d_6$ was developed. Thioacetamide was used as an internal standard. The signals chosen for the analysis were a singlet of 4.03ppm due to the methoxyl group of sulfametrol, a singlet of 3.98ppm due to the methoxyl group of sulfalene and a singlet of 3.83ppm due to the methoxyl group of sulfameter. The quantification of the characteristic peak was done by the integration method and the peak height method. The variation coefficient of sulfametrol, sulfalene and sulfameter were 1.7(n=6), 1.7(n=6) and 1.4%(n=6), respectively in the peak height method and 8.9(n=6), 9.4(n=6) and 7.0(n=6), respectively in the integration method.
박만기(Man Ki Park),박정일(Jeong Hill Park),이미영(Mi Young Lee),박인정(In Jeong Park),김수웅(Su Ung Kim),이승룡(Seung Yong Lee),정훈(Hoon Jeong),이준우(Junn Woo Lee),한만덕(Man Deuck Han) 한국응용약물학회 1994 Biomolecules & Therapeutics(구 응용약물학회지) Vol.2 No.3
G009, isolated from the mycelia of Ganoderma lucidum, has been reported as a potent liver-protecting compound. To characterize this compound, its physicochemical properties were studied. The average molecular weight of the most abundant constituent of G009 was 9.4 kD. The contents of carbohydrate and protein in G009 were 70% and 12.4%, respectively. The main carbohydrate constituents were glucose, xylose, mannose and galactose. Seventeen kinds of amino acid were detected. The contents of carbon, hydrogen, and nitrogen were 40, 5.7, and 1.8%, respectively. Ca, Mg, Zn were also determined.
박만기(Man Ki Park),김종문(Jong Moon Kim),황귀서(Gwi Seo Hwang) 대한약학회 1996 약학회지 Vol.40 No.1
Chemical constituents of Uncaria hooks were studied. Four compounds were isolated from the ether soluble fraction by chromatographic purification process. They were identified as isocorynoxeine-N-oxide, anti-isorhynchophylline-N-oxide, physcion and ursolic acid by spectral evidences. Their contents analyzed by HPLC or GC method were physcion 0.04%, ursolic acid 0.26%, isocorynoxeine-N-oxide 0.04% and anti-isorhynchophylline-N-oxide 0.03% respectively. Isocorynoxeine-N-oxide was not reported in nature so far.
박만기(Man Ki Park),박정일(Jeong Hill Park),김용철(Yong Chul Kim),한병훈(Byung Hoon Han),한용남(Yong Nam Han),류재하(Jae Ha Ryu),유승조(Seung Jo Yoo),김경호(Kyoung Ho Kim) 한국생약학회 1989 생약학회지 Vol.20 No.2
The alkaloids of thirty five Korean plants which belong to Rhamnaceae, Sterculiaceae, Celastracea, Urticaceae and Rubiaceae were screened. Plant was extracted and solvent fractionated to yield ether soluble alkaloidal fraction and butanol soluble fraction. Each fraction was subjected to alkaloidal test by Dragendorff`s reaction. The result showed eighteen plants strong positive, fourteen weak and six negative to alkaloidal test.