Reducing dimensions of the combustion chamber with simultaneous growth of mean effective pressure definitely influences thermodynamics of combustion process as well as it puts into consideration the thermal load of the engine components.
Among nanotechnology-based thermal insulation materials thermodynamic performance of nano-ceramic coatings generates intensive discussions. Complete agreement has not been found yet about the mechanism of their insulating effect. In the Laboratory of Building Materials and Building Physics at Széchenyi István University (Győr, Hungary) heat transfer resistance experiments have been performed in order to describe thermodynamic processes inside nano-ceramic coatings. Previous studies finding after new measurements conducted in 2016-2017 also supported the former assumption that in case of nano-ceramic coatings convective heat transfer coefficient might be taken into account in a different way. Results also showed that thermal insulating effect of nano-ceramic coatings could be caused by a relatively high surface heat transfer resistance.
Isothermal titration calorimetry has been used to determine the stoichiometry, formation constants and thermodynamic parameters
(ΔGo, ΔH, ΔS) for the formation of the citrate complexes with the Mn2+, Co2+, Ni2+ and Zn2+ ions. The measurements were run in Cacodylate, Pipes and Mes buffer solutions with a pH of 6, at 298.15 K. A constant ionic
strength of 100 mM was maintained with NaClO4. The influence of a metal ion on its interaction energy with the citrate ions and the stability of the resulting complexes
have been discussed.
The urobilinogenic chlorophyll catabolites are secondary metabolites formed by the biodegradation of chlorophylls. The thermodynamic study of the urobilinogenic chlorophyll catabolites from autumnal leaves extract of Parrotia persica and Hamamelis virginiana was done using reversed-phase liquid chromatography on the C4 and C8 analytical columns with acidified water-methanol mobile phase in combination with ultraviolet detection and electrospray ionization mass spectrometry. The presence of the urobilinogenic chlorophyll catabolites was detected by their characteristic ultraviolet absorption and their molecular mass. The retention behaviors of the two urobilinogenic chlorophyll catabolite isomers over a temperature range of 278–318 K were investigated. The retention time data permitted the construction of the van't Hoff plots. The stationary phase composition influences the thermodynamics of the retention of the urobilinogenic chlorophyll catabolites. The study presented can find the application in the separation of the urobilinogenic chlorophyll catabolites in autumnal leaves extracts.
determination of the heat of demicellization and the c.m.c. in a single isothermal titration experiment and to carry out the experiment within a wide range of temperature. In this study we examined the thermodynamics of micellization process of aqueous solutions
Authors:Andrzej Mianowski, Izabela Baraniec-Mazurek, and Rafał Bigda
and from own results according to Eq. 16 was obtained:
i.e., E = 89.05 kJ mol −1 , ln A = 15.845 ( A in s −1 ).
Equation 9 is plotted on the basis of thermodynamic data for standard
Authors:Andrzej Mianowski, Zbigniew Robak, Martyna Tomaszewicz, and Sławomir Stelmach
P ↑; there may be a negative effect of pressure, consistent with thermodynamics, α m ↓ when P ↑; or. there may be a combined effect, typical for (a) to (c).
Taking the matter further, as different possibilities for evaluating the reactivity