The activity of thermo-transient receptor potential (TRP) channels is highly dependent on temperature, and thus thermo-TRP reactions have a high temperature coefficient Q 10. In thermodynamics, a high value of Q 10 indicates the existence of a large activation energy (i.e., a large enthalpy) over a short period during the transition process between the closed and open states of the channels. Th...

To estimate the proficiency of inorganic pyrophosphatase as a catalyst, (31)P NMR was used to determine rate constants and thermodynamics of activation for the spontaneous hydrolysis of inorganic pyrophosphate (PP(i)) in the presence and absence of Mg(2+) at elevated temperatures. These values were compared with rate constants and activation parameters determined for the reaction catalyzed by E...

The objective of this work is to obtain the thermodynamic parameters (the changes in enthalpy, Gibbs free energy, and entropy) two degradation steps observed three novel families organometallic dendrimers. isoconversional Flynn–Wall–Ozawa (FWO) model was employed calculate effective activation energy pre-exponential factor. enthalpy entropy revealed a quite consistent tendency with whereas chan...

The accelerated diffusion of ions along grain boundaries in ionic solids may occur two possible paths: (a) the interface core (IC), as known for metals; and (b) space-charge layers (SCLs), located adjacent to core, which point defects responsible are accumulated. In this study, we examined whether it is possible, on basis profiles, discriminate between IC SCL paths. Taking cation MO2 oxides our...

The enthalpy and activation energy for the transformation of the metastable form of tungsten, β-W, which has the topologically close-packed A15 structure (space group Pm3¯n), to equilibrium α-W, which is body-centered cubic (A2, space group Im3¯m), was measured using differential scanning calorimetry. The β-W films were 1 μm-thick and were prepared by sputter deposition in argon with a small am...

Recent experimental studies of Shimizu et al. Phys. Rev. Lett. 98, 095901 2007 revealed an activation enthalpy of 3.6 eV for the vacancy contribution to Si self-diffusion. Although this value seems to be in accurate agreement with recent theoretical results, it is at variance with experiments on vacancy-mediated dopant diffusion in Si. In the present study we review results from electronic stru...