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Comparative study on the thermal behavior of two similar triterpenes from birch |
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| Authors: | Mariana Anghel Gabriela Vlase Mihai Bilanin Titus Vlase Paul Albu Adriana Fuliaş Iolanda Tolan Nicolae Doca |
| Affiliation: | 1. Faculty of Pharmacy, University of Medicine and Pharmacy “Victor Babe?”, Eftimie Murgu Square 2, 300041, Timisoara, Romania 2. Research Center for Thermal Analysis in Environmental Problems, West University of Timi?oara, Str. Pestalozzi No. 16, 300115, Timisoara, Romania 4. SCIENT—Research Center for Instrumental Analysis, (S.C. CROMATEC_PLUS S.R.L), 18 Sos. Cotroceni, 060114, Bucharest 6, Romania 3. Department of Pharmacy, Faculty of General Medicine, Pharmacy and Dentistry, “Vasile Goldis” West University of Arad, 31 H. Coand? St., 310429, Arad, Romania |
| Abstract: | A comparative study on the thermal behavior of betuline and betulinic acid was performed using a TG–FTIR hyphenated technique. The comparison was focused on the kinetic of the relevant thermal-induced phenomenon. Using three different data processing strategy, that is, Friedman, Flynn–Wall–Ozawa, and nonparametric kinetic, homogeneous values for the activation energy were obtained, especially by betulinic acid. The advantages of the nonparametric kinetic method were revealed, especially by obtaining the explicit kinetic parameters of the conversion function, without any “a priori” hypothesis. |
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