Liquids realize a highly complex state of matter in which strong competing kinetic and interaction effects come to life. As such, liquids are more challenging understand than either gases or solids generally. In weakly interacting gases, the dominate. By contrast, low temperature typically feature far smaller fluctuations about their ground state. Notwithstanding complexity, with exception quan...

Diffusion measurements have been made for 114In in Ga between 20° and 455 °C, and for 72Ga in In between the m.p. and 380 °C. Linear plots of D vs T describe the results about equally well as Arrhenius representations. The Arrhenius parameters are D0 = 2.1 • 104 cm2/s, @ = 1.64 kcal/mol for In in Ga, D0 = 2.4 • 10~ 4 cm2/'s, Q = 1.93 kcal/mol for Ga in In. Ga diffuses faster than In in both mat...

Arrhenius plots of the non-latent UDP-glucuronlytransferase reverse reaction (p-nitrophenyl glucuronide donor) activity of guinea-pig microsomal membranes prepared with 15 mM-KCl were linear from 5 to 40 degrees C. These plots for other preparations from guinea-pig and rat liver (i.e. preparations that show transferase latency) exhibited two linear regions intersecting at a transition point nea...

We introduce an asymmetric classical Ginzburg-Landau model in a bounded interval, and study its dynamical behavior when perturbed by weak spatiotemporal noise. The Kramers escape rate from a locally stable state is computed as a function of the interval length. An asymptotically sharp second-order phase transition in activation behavior, with corresponding critical behavior of the rate prefacto...

00 succinate oxidase activity of liver mitochondria from homeotherms and poikilotherms. For the poikilotherms, Arrhenius-type plots were linear over the temperature range 4°to 30°C. In contrast, for the homeotherms, the plots were biphasic with a ‘break” or “discontinuity” at about 23°Cand an increase in Arrhenius activation energy in the temperature range beiow the “break.” The results suggest...

We demonstrate that an extended picture of kinetic constraints in glass-forming liquids is sufficient to explain dynamic anomalies observed in dense suspensions of strongly attracting colloidal particles. We augment a simple model of heterogeneous relaxation with static attractions between facilitating excitations, in a way that mimics the structural effect of short-ranged interparticle attract...

Self-diffusion coefficient measurements were performed for pure n-alkyl ketone liquids using the pulsed field gradient NMR spin-echo technique. Ionic conductivities and dielectric constants of 0.0055 mol·L-1 tetrabutylammonium trifluoromethanesulfonate in 2-pentanone, 2-hexanone, 2-heptanone, 2-octanone, 2-nonanone, and 2-decanone were also measured. The temperature-dependent conductivities and...

In heterogeneous catalysis, rates with Arrhenius-like temperature dependence are ubiquitous. Compensation phenomena, which arise from the linear correlation between the apparent activation energy and the logarithm of the apparent pre-exponential factor, are also common. Here, we study the origin of compensation and find a similar dependence on the rate-limiting surface coverage term for each Ar...

Amorphous arsenic sulphide As2S3 films prepared by ultrafast pulsed laser deposition have been vacuum annealed at a range of different temperatures. Measurements of the glass transition temperature indicate that a crystallization process initiates at annealing temperatures around 170 °C. In combination with Raman scattering analysis, we conclude that phase separation is intrinsic for our as-dep...

Charge transport models developed for disordered organic semiconductors predict a non-Arrhenius temperature dependence ln(mu) proportional, variant1/T(2) for the mobility mu. We demonstrate that in space-charge limited diodes the hole mobility (micro(h)) of a large variety of organic semiconductors shows a universal Arrhenius temperature dependence micro(h)(T) = micro(0)exp(-Delta/kT) at low fi...