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고속액체 크로마토그라프법을 이용한 제제중 Aclatonium Napadisilate 의 정량 및 함량균일성에 관한 연구
김용주,허재두,김면종,박세호,노회숙 한국약제학회 1986 Journal of Pharmaceutical Investigation Vol.16 No.2
A convenient high performance liquid chromatographic method was established for the quantitative determination and content uniformity test of aclatonium napadisilate preparation. This method was more simple to make the sample solution for injection, and easy to determine the content in the preparation. Aclatonium napadisilate was chromatographed using a Lichrosorb-NH₂ column (4㎜ × 25 ㎝, and acetonitrile-water mixture (83:17) as an eluent at a flow rate of 1.8 ㎖/min. RI-detector response was linear over a range of 0.5∼2.0% aclatonium napadisilate under above conditions. Reproducibility studies gave relative standard deviation of 1.29%.
산소 플라즈마에서의 분자살 적층성장에 의한 $CeO_2$ 박막의 성장과 구조
김용주,S.A. Chambers 한국진공학회 2000 Applied Science and Convergence Technology Vol.9 No.1
The epitaxial growth of $CeO_2$ films has been investigated on three different substrates-Si(111), $SrTiO_3$(001), and MgO(001)-over wide range of growth parameters using oxygen-plasma-assisted molecular beam epitaxy. Pure-phase, single-crystalline epitaxial films of $CeO_2$ (001) have been grown only on $SrTiO_3$(001). We discuss the growth conditions in conjunction with the choice of substrates required to synthe-size this oxide, as well as the associated characterization by menas of x-ray diffraction, reflection high-energy electron diffraction, low-energy electron diffraction, and x-ray photoelectron spectroscopy and diffraction. Successful growth of single crystalline $CeO_2$ depends critically on the choice of substrate and is rather insensitive to the growth conditions studied in this investigation. $CeO_2$(001) films on $SrTiO_3$exhibit the sturcture of bulk $CeO_2$ without surface reconstructions. Ti outdiffusion is observed on the films grown temperatures above $650^{\circ}C$.