http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
메틸 5-하이드록시 디나프토[1,2-2'',3'']푸란-7,12-디온-6-칼복시레이트 유도체의 분리 분석
우영아(Young Ah Woo),강경환(Kyoung Hwan Kang),신준수(Joon Su Shin),장혜선(Hae Seon Jang),김박광(Bak Kwang Kim) 대한약학회 1994 약학회지 Vol.38 No.5
The derivatives of methyl 5-hydroxy-dinaphtho[l,2-2'',3'']furan-7,12-dione-6-carboxylate (MHDDC) were synthesized by condensing alkyl sulfate or alkyl halide with MHDDC in organic solvent, and their structures were identified by NMR, MS, UV, IR etc. We also investigated the physico-chemical properties, physiological activities, and set up the micro-analytical method of the compounds.
우영아(Young Ah Woo),조창희(Chang Hee Cho),김효진(Hyo Jin Kim),조정환(Jung Hwan Cho),조경규(Kyung Kye Cho),정승성(Seung Sung Chung),김수정(Soo Jung Kim),김중환(Joong Hwan Kim) 대한약학회 1998 약학회지 Vol.42 No.4
Near infrared reflectance spectroscopy (NIRS) was applied for discrimination according to geographical origin (Korea, China) of herb drugs. Herbal medicine has an important role in clinical therapy in Asian countries such as Korea and China. The objective of this study is to provide a convenient and accurate method to determinate geographical origin (Korea, China) of herbal medicine for quality control whose quality is generally different according to geographical origin. A rapid, nondestructive and accurate discrimination was achieved by NIRS. Second derivative spectra of herb drugs were subjected to discriminant analysis. Herbal medicine drugs such as Cassia Semen, Ganoderma and Smilacis Rhizoma was discriminated accurately according to geographical origin using PLS regression method.
LC/MS/MS를 이용한 원숭이 혈액에서의 Doxifluridine과 대사체 5-FU 동시분석법 개발 및 Validation
우영아,김기환,김원,이종화,정은주,김진호,박귀례,김충용,Woo, Young-Ah,Kim, Ghee-Hwan,Kim, Won,Lee, Jong-Hwa,Jeong, Eun-Ju,Kim, Jin-Ho,Park, Kui-Lea,Kim, Choong-Yong 대한약학회 2007 약학회지 Vol.51 No.3
A reverse-phase high performance liquid chromatography method with electrospray ionization and detection by mass spectrometry is described for the simultaneous determination of doxifluridine and its active metabolite 5-flu-orouracil (5-FU) in monkey serum. The method has greater sensitivity and simpler process than previous published methods with good accuracy and precision. A proper liquid/liquid extraction was used to extract simultaneously doxifluridine and 5-FU which has considerable difference in the polarity. Extracts were analyzed using LC/MS/MS providing a short analysis time within 5 min. The lower limit of quantification was validated at 10.0 ng/ml of serum for both doxifluridine and 5-FU. Accuracy and precision of quality control (QC) samples for both analytes met FDA Guidance criteria of ±15% for average QC accuracy with coefficients of variation less than 15%. The method will be applicable for preclinical studies and bioequivalence studies.
LC/MS/MS를 이용한 원숭이 및 비글견의 간 및 장관 조직에서의 Doxifluridine과 대사체 5-FU 동시분석법 개발
우영아,김기환,정은주,김충용,Woo, Young-Ah,Kim, Ghee-Hwan,Jeong, Eun-Ju,Kim, Choong-Yong 대한약학회 2008 약학회지 Vol.52 No.2
A liquid chromatographic method with tandom spectrometric detection (LC/MS/MS) for the simultaneous determination of doxifluridine and its active metabolite, 5-fluorouracil (5-FU) was developed over the concentration range of $5{\sim}2000$ ng/ml, respectively. Doxifluridine, 5-FU and internal standard, 5-chlorouracil (5-CU), were extracted from liver and intestine tissue via protein precipitation. Acetonitrile was used as the extraction solvent and the supernatant was evaporated and reconstructed in mobile phase. Optimum chromatographic separation was achieved on a Agilent Zorbax $C_{18}$ ($100\;mm{\times}2.1\;mm$, $3.5\;{\mu}m$) column with mobile phase run in isocratic with methanol : water (20 : 80, v/v). The flow rate was 0.2 ml/min with total cycle time of 5 min. The lower limit of quantification was validated at 5.0 ng/ml of liver and intestine tissue, for both doxifluridine and 5-FU, respectively. The intra-day and inter-day precision and accuracy of quality control (QC) samples were <11% coefficient of variation and <7% relative error from theoretical concentration for both analytes. In addition, the special designed stability study was performed, because the metabolism of doxifluridine occurs spontaneously even in ice bath for monkey liver. The stability of doxifluridine in liver and intestine of monkey and beagle dog was compared. It was found that bioanalytical validation could not be performed for the monkey liver; however, beagle dog's liver has relatively low speed of metabolism compared to monkey liver and instead of monkey liver, beagle dog's liver could be used for the validation. Bioanalytical validation could be performed in monkey intestine. Eventually, this developed method for liver and intestine will be useful in support of the toxicokinetic and pharmacokinetic studies of doxifluridine and 5-FU.
Photo Diode Array형의 휴대용 근적외 분광기와 FT 근적외 분광기를 이용한 Hairless Mouse 피부 수분 정량
서은정,우영아,김효진,Suh, Eun-Jung,Woo, Young-Ah,Kim, Hyo-Jin 대한약학회 2005 약학회지 Vol.49 No.2
In this study, the performance of a portable NIR system and a FT NIR spectrometer were compared to determine water content of hairless mouse skin. The stratum corneum parts wer e separated from the epidermal tissues by trypsin solution. NIR diffuse reflectance spectra of hairless mouse skin were acquired using a fiber optic probe. In the near infrared, water molecules show two clear absorption bands at 1450 nm from first overtone of O-H stretching and 1940 nm from the combination involving O-H stretching and O-H deformation. It was found that the variations of O-H absorption band according to water content. Partial least squares regression (PLSR) was applied to develop a calibration model. The PLS model showed a good correlation between NIR predicted value and the absolute water content of separated hairless mouse skin, in vitro. For both the portable and the FT NIR spectrometer, These studies showed the possibility of a rapid and nondestructive skin moisture measurement using NIR spectroscopy. The portable NIR spectrometer with a photodiode arrays-microsensor could be more rapidly applied for the determination of water content with comparable accuracy with the performance of a FT spectrometer .
김도형(Do Hyung Kim),우영아(Young Ah Woo),김효진(Hyo Jin Kim) 대한약학회 2005 약학회지 Vol.49 No.1
Near-infrared (NIR) spectroscopy has been widely applied in various field, since it is nondestructive and no sample preparation is required. In this paper, NIR spectroscopy was used for the determination of naproxen in a commercial pharmaceutical preparation. NIR spectroscopy was used to determine the content of naproxen in intact naproxen tablets containing 250 mg (65.8% nominal concentration) by collecting NIR spectra in the range of 1100~1750 nm. The laboratory-made samples had 46.1-85.5% nominal naproxen concentration. The measurements were made by reflection using a fiberoptic probe and calibration was carried out by partial least square regression (PLSR). Model validation was performed by randomly splitting the data set into calibration and validation data set (63 samples as a calibration data set and 42 samples as a validation data set). The developed NIR calibration gave results comparable to the known values of tablets in a laboratorial manufActuring process with standard error of calibration (SEC) and standard error of prediction (SEP) of 1.06% and 1.04%, respectively. The NIR method showed good accuracy and repeatability. NIR spectroscopic determination in intact tablets allowed the potential use of real time monitoring for a running production process.
강나루(Na Roo Kang),우영아(Young Ah Woo),차봉수(Bong Soo Cha),이현철(Hyun Chul Lee),김효진(Hyo Jin Kim) 대한약학회 2002 약학회지 Vol.46 No.5
The purpose of this study is to develop a non-invasive blood glucose measurement method by a portable near infrared (NIR) system which was newly integrated by our lab. The portable NIR system includes a tungsten halogen lamp, a specialized reflectance fiber optic probe and a photo diode array type InGaAs detector, which was developed by a microchip technology based on the lithography: Reflectance NIR spectra of different parts of human body (finger tip, earlobe, and inner lip) were recorded by using a fiber optic probe. The spectra were collected over the spectral range 1100~1740 nm. Partial least squares regression (PLSR) was applied for the calibration and validation for the determination of blood glucose. The calibration model from earlobe spectra presented better results, showing good correlation with a glucose oxidase method which is a mostly used standard method. This model predicted the glucose concentration for validation set with a SEP of 33 mg/Dl. This study indicated the feasibility for non-invasive monitoring of blood glucose by a portable near ifrared system.