The JG β-relaxation in water and impact on the dynamics of aqueous mixtures and hydrated biomolecules.

Although by now the glass transition temperature of uncrystallized bulk water is generally accepted to manifest at temperature T near 136 K, not much known are the spectral dispersion of the structural α-relaxation and the temperature dependence of its relaxation time τ(T). Whether bulk water has the supposedly ubiquitous Johari-Goldstein (JG) β-relaxation is a question that has not been answered. By studying the structural α-relaxation over a wide range of temperatures in several aqueous mixtures without crystallization and with glass transition temperatures T close to 136 K, we deduce the properties of the α-relaxation and the temperature dependence of τ(T) of bulk water.

Diffusion of methane in supercritical carbon dioxide across the Widom line.

Diffusion of methane diluted in supercritical carbon dioxide is studied by experiment and molecular simulation in the temperature range from 292.55 to 332.85 K along the isobars 9.

Development of a high-pressure set-up for measurements of binary diffusion coefficients in supercritical carbon dioxide.

We present the development of a high-pressure apparatus for measurements of diffusion coefficients in supercritical fluids. The Taylor dispersion method has been adapted to conduct experiments at the pressures up to 25.0 MPa.

Time-Dependent Gene Network Modelling by Sequential Monte Carlo.

Most existing methods used for gene regulatory network modeling are dedicated to inference of steady state networks, which are prevalent over all time instants. However, gene interactions evolve over time. Information about the gene interactions in different stages of the life cycle of a cell or an organism is of high importance for biology.

Evidence of coexistence of change of caged dynamics at T(g) and the dynamic transition at T(d) in solvated proteins.

Mössbauer spectroscopy and neutron scattering measurements on proteins embedded in solvents including water and aqueous mixtures have emphasized the observation of the distinctive temperature dependence of the atomic mean square displacements, , commonly referred to as the dynamic transition at some temperature T(d). At low temperatures, increases slowly, but it assumes stronger temperature dependence after crossing T(d), which depends on the time/frequency resolution of the spectrometer. Various authors have made connection of the dynamics of solvated proteins, including the dynamic transition to that of glass-forming substances.