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Thermochemistry of myricetin flavonoid |
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| Authors: | A Z Abil’daeva Sh B Kasenova B K Kasenov Zh I Sagintaeva E E Kuanyshbekov B B Rakhimova V V Polyakov S M Adekenov |
| Institution: | 1. Abishev Chemical and Metallurgical Institute, Karaganda, 100009, Kazakhstan 2. AO Phytochemistry, Karaganda, 100009, Kazakhstan 3. Kozybayev North Kazakhstan State University, Petropavlovsk, 642000, Kazakhstan |
| Abstract: | The enthalpies of myricetin dissolution are measured by means of calorimetry with mol dilutions of flavonoid: 96 mol % ethanol equal to 1: 9000, 1: 18000, and 1: 36000. The standard enthalpies of dissolution for the biologically active substance in an infinitely diluted (standard) solution of 96% ethanol are calculated from the experimental data. Physicochemical means of approximation are used to estimate the values of the standard enthalpy of combustion, and the enthalpy of melting is calculated for the investigated flavonoid. Finally, the compound’s standard enthalpy of formation is calculated using the Hess cycle. |
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