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논문 기본 정보

자료유형
학술저널
저자정보
Deng, Ying-Jie (Department of Pharmaceutical Sciences, Shenyang Pharmaceutical University) Zhang, Han (Shanghai University of TCM) Wang, Qiang (Institute of New Drug Research, School of Pharmacy, Jinan University) Suo, Xu-Bin (Institute of New Drug Research, School of Pharmacy, Jinan University, Department of Pharmaceutical Sciences, Shenyang Pharmaceutical University)
저널정보
대한약학회 Archives of pharmacal research : a publication of the Pharmaceutical Society of Korea Archives of pharmacal research : a publication of the Pharmaceutical Society of Korea 제30권 제7호
발행연도
2007.1
수록면
876 - 883 (8page)

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The aim of this study was to explore the degradation kinetics of water-insoluble lauroyl-indapamide in solutions and predict the stabilities of lauroyl-indapamide encapsulated in liposomes. Buffer-acetone (9:1) was used as the reaction solution and the reaction temperature was maintained at $60^{\circ}C$. The correlation of the apparent degradation constants ($k_{obs}$) of lauroyl-indapamide in liposomes and in buffer-acetone solutions at different pH has been explored. The degradation of lauroyl-indapamide in solutions was found to follow pseudo-first-order kinetics and was significantly dependent on the pH values. Lauroyl-indapamide was the most stable at pH 6.8, increasing or decreasing the pH of the solutions would decrease its stabilities. Buffer concentration had some effects on the stabilities of lauroyl-indapamide. The degradation active energies Ea were $68.19\;kJ{\cdot}mol^{-1}$, $131.75\;kJ{\cdot}mol^{-1}$ and $107.72\;kJ{\cdot}mol^{-1}$ at pH3.6, 6.8 and 12 respectively in acetone-free buffer solutions (0.05M) calculated according to the Arrhenius equation with the extrapolation method. The apparent degradation constants ($k_{obs}$) of lauroyl-indapamide in liposome and in buffer-acetone (9:1) solutions showed a good correlation at different pH levels, which indicates that the stabilities of the drug that dissolved in acetone-buffer mixture solutions can be used to predict the stabilities of the drug in liposomes as well.

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