It is generally expected that the kinetics of reactions inside living cells differs from the situation in bulk solutions. Macromolecular crowding and specific binding interactions could change the diffusion properties and the availability of free molecules. Their impact on reaction kinetics in the relevant context of living cells is still elusive, mainly because the difficulty of capturing fast...

We study here the large time behavior of the radius R(t) of a spherical grain in a dilute solution of the same substance. The evolution in time of the grain is governed by a reaction-diiusion process in the liquid phase and by a dissolution/accretion process located at the interface which determines the interface kinetics; a discussion of this modelling is provided. When there is no reaction, t...

We developed a detailed chemical kinetics model for the pyrolysis of long-chain polycyclic n-alkylarenes based on a general free-radical mechanism. The model accounts for the two major primary pathways in the pyrolysis network of polycyclic alkylaromatics. Using 1-dodecylpyrene (DDP) as an example, we show that the model qualitatively predicted the effects of time, temperature, and concentratio...

Non-linear saturation kinetics can be described through a potency function, a trigonometric function, a logarithmic function, a hyperbolic function, or an exponential function. Saturable enzyme reaction kinetics can be alternatively formulated as a 1-exp function without the limitations of a steady-state assumption (d[C]/dt = 0, where C is the enzyme-substrate complex). The time-dependent subst...

Peptide bond synthesis was performed on PEGA beads under microwave radiations. Classical chemical coupling as well as thermolysin catalyzed synthesis was studied, and the effect of microwave radiations on reaction kinetics, beads' integrity, and enzyme activity was assessed. Results demonstrate that microwave radiations can be profitably exploited to improve reaction kinetics in solid phase pep...

The investigation of enzyme reaction kinetics in nanoconfined spaces mimicking the conditions in living systems is of great significance. Here, a nanofluidics chip integrated with an electrochemical detector has been designed for studying "free state" enzyme reaction kinetics in nanoconfinement. The nanofluidics chip is fabricated using the UV-ablation technique developed in our group. The enzy...

Copper- and nitrogen-doped carbonaceous materials, obtained by a simple synthetic procedure are highly efficient fast catalysts for the oxygen reduction reaction. It is shown, that Cu( i ) containing materials perform with faster reaction kinetics.