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- 저자 : Seella, Ramanaiah (검색결과 1 건)
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Basivi, Praveen Kumar,Pasupuleti, Visweswara Rao,Seella, Ramanaiah,Tukiakula, Madhusudana Reddy,Kalluru, Subramanyam Reddy,Park, Soo-Jin American Chemical Society 2017 Journal of chemical and engineering data Vol.62 No.7
<P>The inverse gas chromatography study on the fluconazole drug surface was performed, and the net retention volumes, polar probes, and VN of n-alkanes are determined at four temperatures over the range 318.15-333.15 K. The net retention values of n-alkanes were used to evaluate the London dispersive surface free energy gamma(L)(S) by three different methods, namely, the Donnet Park, Dorris Gray, and Schultz methods. The gamma(L)(S) values were found to increase from 318.15 to 323.15 K for all three methods and then decrease from 323.15 to 333.15 K. The gamma(L)(S) values were found to be slightly higher in the Schultz method when compared to the results of the Donnet-Park and Dorris-Gray methods. The specific free energy values Delta G(a)(s) and the specific enthalpy Delta H-a(s) values have been calculated using the V-N data of polar probes. The Guttmann Lewis acid base parameters, K-a and K-b, were obtained using Delta H-a(s) values and were found to be 0.217 and 1.518, respectively. The surface character (K-b/K-a) was found to be 7.0. The results revealed that the fluconazole powder surface contains relatively more basic sites than acidic sites and can combine strongly with acidic substrates. The surface energy and acid base data of fluconazole can be used during formulation of the drug and to understand the drug release process.</P>
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