Oscillating chemical reactions are common in biological systems and they also occur in artificial non-biological systems. Generally, these reactions are subject to random fluctuations in environmental conditions which translate into fluctuations in the values of physical variables, for example, temperature. We formulate a mathematical model for a nonisothermal minimal chemical oscillator contai...

Endothelial cells are responsible for the formation of the capillary blood vessel network. We describe a system of endothelial cells by means of two-dimensional molecular dynamics simulations of point-like particles. Cells’ motion is governed by the gradient of the concentration of a chemical substance that they produce (chemotaxis). The typical time of degradation of the chemical substance int...

We report on the use of characteristic prompt γ-fluorescence after neutron capture induced by an evanescent neutron wave to probe densities and depth profiles of labeled molecules at solid/liquid interfaces. In contrast to classical scattering techniques and X-ray fluorescence, this method of "grazing-incidence neutron-induced fluorescence" combines direct chemical specificity, provided by the ...

Hymenocrater calycinus (Boiss.) Benth. is endemic to Iran and it is growing natural habitats in the north east of Iran.  In traditional medicine, this plant use for flu treatment, diuretic, antibacterial, antifungal and antioxidant. In order, this plant know ecological characteristic for introduce and dense cultivation on farm land and then use in medical industries. Such as this plant natural ...

We calculate characteristic time scales for chemical equilibration of pions in hot hadronic matter using an effective chiral Lagrangian. We find that inelastic processes involving the vector and axial vector mesons reduce the chemical equilibration time by a factor of ∼ 10 compared to the result previously calculated in chiral perturbation theory. For a temperature of T ∼ 150MeV we obtain a che...