From the discovery of first fast ionic conductor silver iodide in early 20th century to recent lithium conductors with conductivities surpassing those liquid electrolytes, high conductivity ? has often been associated low activation energy Ea following Arrhenius equation. However, Meyer–Neldel rule (MNR) indicates that and prefactor ?0 are correlated, suggesting relation between is, fact, compl...

Glassy dielectric properties were investigated in lead-free BaZr0.4Ti0.6O3 (BZT40) ceramic samples using spectroscopy the frequency range of 0.003 Hz–1 MHz and at temperatures 10 K < T 300 K. Measurements quasistatic polarization bias electric fields up to ~28 kV/cm suggested that a ferroelectric state could not be induced, contrast case canonical relaxors such as PMN. The freezing dynamics ...

a palladium composite membrane was prepared via electroless plating technique using organic-inorganic method during activation process. the ceramic support surface was modified by two tio2-boehmite and one γ-alumina layers to avoid pd penetration in support pores. thin and defect-free pd composite membrane was obtained by creating a relative smoothness on the ceramic support and using pd nanopa...

Calculation of excess quantities of ethylene glycol + water binary fluid systems at seven absolute temperatures (293.15 to 353.15) K from experimentally determined values of density and shear viscosity were presented in previous work. The examination of related functions beside the quality of correlation from several equations on these experimental values has also been reported. Considering...

We present PLTplot, a plotting package for PLT Scheme. PLTplot provides a basic interface for producing common types of plots such as line and vector field plots from Scheme functions and data, an advanced interface for producing customized plot types, and support for standard curve fitting. It incorporates renderer constructors, transformers from data to its graphical representation, as values...

We report results from the molecular dynamics simulations of a binary colloidal mixture subjected to an external potential barrier along one spatial directions at low volume fraction, {\phi} = 0.2. The variations in asymmetry do not change smaller particles, showing Arrhenius diffusion. However, larger particles shows crossover sub-Arrhenius super-Arrhenius diffusion with temperatures and fract...

3,4-dihydroxyphenylacetate (DHPA) dioxygenase (DHPAO) from Pseudomonas aeruginosa (PaDHPAO) was overexpressed in Escherichia coli and purified to homogeneity. As the enzyme lost activity over time, a protocol to reactivate and conserve PaDHPAO activity has been developed. Addition of Fe(II), DTT and ascorbic acid or ROS scavenging enzymes (catalase or superoxide dismutase) was required to prese...

The presence of small amounts of weakly immobilized probes can result in large systematic errors in the measurement of correlation times (tau r) from saturation transfer EPR spectra. However, we have recently developed experimental methodology to minimize these errors (Squier and Thomas, Biophys. J., 49:921-935). In the present study we have applied this methodology to the measurement of the ro...