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SCREENING OF BENZODIAZEPINES IN URINE BY THE IMMUNOASSAY AND QUANTITATION BY GC-NPD METHOD
Park, Jongsei,Park, Jeongeum,Park, Myung-Ja Korean Society of ToxicologyKorea Environmental Mu 1991 Toxicological Research Vol.7 No.1
We developed a simple method to determine benzodiazepines in biological samples using electron capature detectors and nitrogen-phosphorous detectors. The extraction of 13 benezodiazepines in urine at pH 9.5 with toluene and its analysis in GC/NPD showed the peaks in 9-16 min. In this retention time range, the biological backaground was fairly low and the drugs could be identified in low concentrations. The benzodiazepines in urine samples were screened by the fluorescence polarization immunoassay and positive samples were confirmed by the GC/NPD method.
Design and synthesis ofα,β-unsaturated carbonyl compounds as potential ACE inhibitors
Park Choo, Hea-Young,Peak, Kyung-Hee,Park, Jongsei,Kim, Dong Hyun,Chung, Hak Soon 梨花女子大學校 藥學硏究所 2000 藥學硏究論文集 Vol.- No.9
The α, β-unsaturated amide that is incorporated into the basic structural frame of a simple substrate molecule of angiotensin converting enzyme was found to serve as a Michael acceptor for the catalytic carboxylate of Glu-127, inhibiting the enzyme irreversibly.
Hong, Jongki,Park, Jongsei,Kim, Kang-Jin 한국분석과학회 1995 분석과학 Vol.8 No.4
Polychlorodibenzo-p-dioxins(PCDDs) have been prepared by microsacale pyrolysis of trichlorophenates. During the pyrolysis reaction, dechlorinated dibenzo-p-dioxins were also formed by the thermolysis of PCDDs. The dechlorination pathways of PCDDs were suggested in this reaction. The identification of these products was performed using capillary column gas chromatography-mass spectrometry.
METABOLISM AND DISPOSITION OF CHLORZOXAZONE IN RATS: EFFECTS OF ETHANOL AND DISULFIRAM
Kim, Dong-Hyun,Park, Misuk,Park, Jongsei Korean Society of ToxicologyKorea Environmental Mu 1993 Toxicological Research Vol.9 No.1
Role of rat cytochrome P-450 2E1(P-450 2E 1) in the metabolism of chlorzoxazone was examined by using several approaches' (1) selective inhibiton of catalytic activity in rat liver microsomes by diethyldithiocarbamate, (2) correlation of dimethylnitrosomine N-demethylation with chlorzoxazone 6-hydroxylation, and (3) immunoinhibition of catalytic activity with rabbit anti-rat P-450. The results indicated that P-450 2E1 is responsible for the metabolism of chlorzoxazone.