http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
고성능 액체 크로마토그래피에서 키랄 크라운 에테르로부터 유도된 키랄 고정상을 이용한 광학분리의 비교
황호(Hu Huang),전소희(So Hee Jeon),김지연(Ji Yeon Kim),이원재(Wonjae Lee) 한국생물공학회 2012 KSBB Journal Vol.27 No.4
Comparative liquid chromatographic enantiomer separation of α-amino acids, their esters and primary amino compounds was performed using two chiral stationary phases (CSPs) prepared by covalently bonding (+)-(18-crown-6)- 2,3,11,12-tetracarboxylic acid (18-C-6-TA) of the same chiral selector. In general, the separation factors and resolution factors for these analytes on CSP 1 were greater than on CSP 2, while these capacity factors on CSP 2 were quite greater than on CSP 1. Except for leucine methyl ester and phenylalanine methyl ester, the elution orders of all analytes including α- amino α-alkyl acids and phenylglycine alkyl esters on CSP 1 are identical to those on CSP 2. This study showed that different connecting structures for these two CSPs might influence their ability to resolve the analytes depending on their structures related to the chiral recognition mechanism.
다당 유도체를 기초로 한 키랄 컬럼에서 아미노산 에스테르의 안트르알디민 유도체의 광학분리 및 광학순도 측정
황호(Hu Huang),김경옥(Jing Yu Jin),이원재(Wonjae Lee) 한국생물공학회 2011 KSBB Journal Vol.26 No.2
The chromatographic enantiomer separation of 9-anthraldimine derivatives of α-amino acid methyl and ethyl esters on four polysaccharide based chiral columns was performed. The 9-anthraldehyde Schiff base derivatives of α- amino acid esters were readily synthesized by stirring the α-amino acid ester hydrochloride salts with 9-anthraldehyde in the presence of 1,8-diazabicyclo [5.4.0]undec-7-ene as a base and anhydrous MgSO₄. Chiralcel OD or Chiralcel OD-H showed the greatest enantiomer resolution of 9-anthraldimine derivatives of α-amino acid methyl and ethyl esters. The L-enantiomers of all the analytes were preferentially retained on Chiralcel OD or Chiralcel OD-H. This analytical method was applied in the determination of optical purities of several commercially available D- or L-α-amino acid methyl esters.
임신토끼에 있어서 새로운 Recombinant Human Granulocyte Colony - Stimulating Factor ( YHB6211 ) 의 배 , 태자 발생독성평가
황재식(Zai Zhi Huang),이수해(Su Hae Lee),신지순(Ji Soon Sin),신장우(Jang Woo Sin),최연식(Yeon Shik Choi),김대중(Dae Joong Kim),장호송(Hu Song Zhang),정은용(Eun Yong Jung),서동석(Dong Suk Seo),안경규(Kyoung Kyu Ahn),남상윤(Sang Yoon N 한국응용약물학회 2001 Biomolecules & Therapeutics(구 응용약물학회지) Vol.9 No.4
N/A YHB6211, a newly developed recombinant human granulocyte colonystimulating factor, was administered at dose levels of 0, 3, 15, and 75 ㎍/㎏/day intravenously to the pregnant New Zealand White rabbits (20 rabbits per group) during the organogenetic period, days 6 to 18 of gestation. All dams were subjected to Caesarian section on day 28 of gestation and their fetuses were examined for external, visceral, and skeletal abnormalities. No abnormalities in clinical signs, body weight changes, gross findings, mortality, and external appearance were found in all dams and fetuses exposed to 0, 3, and 15 ㎍/㎏/day of YHB6211. However, in the group treated with 75 ㎍/㎏/day of YHB6211, maternal body and uterine weights, fetal body weights and length, and the number of live fetuses were significantly decreased and further fetal mortality was remarkably increased. It is suggested that YHB6211 may have no side effect up to the dose level of 15 ㎍/㎏/day, and there would be no teratogenicity for fetuses of rabbits up to 75 ㎍/㎏/day even if it may have some toxic effects over 75 ㎍/㎏/day for dams and fetuses of rabbits.
다당유도체로 공유결합된 카이랄 칼럼에서 이동상과 분석물질의 용매가 거울상 이성질체의 광학분할에 미치는 영향
황호,이범규,백채선,이원재,Huang, Hu,Lee, Beom-Gyu,Baek, Chae-Sun,Lee, Won-Jae 대한화학회 2009 대한화학회지 Vol.53 No.2
공유결합된 다당유도체에서 유도된 카이랄 칼럼인 Chiralpak IC을 사용하여 N-BOC $\alpha$-amino acid와 그들의 ethyl ester 유도체의 액체크로마토그래피 거울상 이성질체의 분리를 수행하였다. 다양 한 이동상에서 공유결합된 카이랄 칼럼인 Chiralpak IC에서 거울상 이성질체가 분리된 실험결과를 나 타내었으며, 광학분할의 선택성과 분리인자가 이동상에 따라 크게 영향을 받았다. 또한 동일한 이동 상에서 분석물질의 녹이는 용매에 따라 거울상 이성질체의 분리에 미치는 영향과 분석용 컬럼에서 거울상 이성질체의 분리의 여러 예를 나타내었다. Liquid chromatographic enantiomer separation of N-tert-butoxycarbonyl (BOC) $\alpha$-amino acids and their ethyl esters was performed on covalently immobilized chiral column (Chiralpak IC) derived from polysaccharide derivative. The solvent versatility of the covalently immobilized Chiralpak IC in enantiomer separation of N-BOC $\alpha$-amino acid ethyl ester derivatives was shown and the chromatographic parameters of their enantioselectivities and resolution factors were greatly influenced by the nature of the mobile phase. Also the effect on the dissolving solvent for these analytes on the enantiomer separation using the same mobile phase and the examples of preparative enantiomer separation on analytical column were shown.
이온쌍-고성능 액체크로마토그래피에 의한 감기약 시럽에서 타르색소 첨가물의 동시분석
김경옥(Jing Yu Jin),황호(Hu Huang),이범규(Beom-Gyu Lee),이원재(Wonjae Lee) 한국생물공학회 2010 KSBB Journal Vol.25 No.5
A simple and efficient analytical method for the simultaneous determination of seven tar color additives was developed using ion pair high performance liquid chromatography. The conditions for HPLC analysis were as follows: column, μ-Bondapak C18 (10 μm, 300 × 3.9 mm i.d.); gradient mobile phase, 0.025 mol/L ammonium acetate (containing 0.01 mol/L tetrabutylammonium bromide)-acetonitrile-methanol (65:25:10) as a mobile for fraction A and 0.025 mol/L ammonium acetate (containing 0.01 mol/L tetrabutylammonium bromide)-acetonitrilemethanol (40:50:10) as a mobile for fraction B; flow rate, 1.0 mL/ min; detection wavelength, 254/520/620 nm. We could attain to the detection limits as 0.01~0.05 μg/mL (254 nm) and 0.005~0.01 μg/mL (520 nm) for six red tar color additives, and 0.05 μg/mL (254 nm) and 0.002 μg/mL (620 nm) for Fast green FCF. This analytical method was applicable to determine the tar color additives contained in several commercial cold syrups.
아미노산 에스테르의 벤조피논 이민 유도체의 액체 크로마토그래피의 광학분리
윤원남(Won Nam Yun),서문준(Wen Jun Xu),황호(Hu Huang),이원재(Wonjae Lee) 한국생물공학회 2012 KSBB Journal Vol.27 No.3
A convenient liquid chromatographic enantiomer separation of several α-amino acid esters as benzophenone Schiff base derivatives on covalently immobilized chiral stationary phases (CSPs) derived from polysaccharide derivatives was developed. The benzophenone imine derivatives of α-amino acid esters were readily prepared by stirring benzophenone imine and the α-amino acid ester hydrochloride salts in 2-propanol. The chromatographic conditions used on all CSPs were 0.5% or 5% 2-propanol/hexane (V/V) as the mobile phases at 1 mL/min of flow rate and UV 254 nm detection. The performance of Chiralpak IC among all CSPs was superior to that of the other CSPs for resolution of benzophenone imine derivatives of α-amino acid esters. It is expected that the developed analytical method will be useful for enantiomer resolution of other α-amino acid esters as benzophenone Schiff base derivatives.
새로운 간질환치료제(고덱스 : 헤파디프에스)의 랫드에 대한 4주반복투여 경구독성시험
강종구(Jong-Kii Kang),정은용(Eun-Yong Jung),박선희(Sun-Hee Park),김선희(Sun-Hee Kim),이수해(Su-Hae Lee),장호송(Hu-Song Zhang),황재식(Zai-Zhi Huang),남상윤(Sang-Yoon Nam) 한국독성학회 2001 Toxicological Research Vol.17 No.2
This study was designed to evaluate a repeated oral dose toxicity of a new hepatotherapeutic agent GODEX in Sprague-Dawley rats. Male and female rats were orally administered with dosages of 500, 100, 20, and a mg/kg/day of GODEX daily for 4 weeks, respectively. There were no dose-related changes in clinical signs, body weight changes, food and water consumption, opthalmoscopy, organ weights, urine analysis, biochemical examination, and hematological findings of all animals treated with GODEX. Gross and histopathological findings revealed no evidence of specific toxicity related to GODEX. These indicate that GODEX may have no side effects and its oral maximum tolerated dose value may be over 500 mg/kg in rats.