Pharmacology started to develop into a real quantitative science in 1909, when A.V. Hill derived the Langmuir equation in the course of his studies on nicotine and curare. A history of the developments since then shows both brilliant insights and missed opportunities. It also shows that much remains to be done. There is still no mathematical description that can describe quantitatively the acti...

This study reports the capacities and mechanisms of live biomass of an ascomycetes strain, Aspergillus niger HM11 biomass preparations in removing a textile dye Reactive blue 140 from aqueous solution was investigated with different parameters, such as adsorbent dosage, pH, initial dye concentrations and equilibrium time. pH study and desorption profile proved that adsorption process was suppor...

The removal of rhodamine B and malachite green from aqueous solutions was studied in batch adsorption systems using Tamarindus Indica fruit shells as sorbents. The well known Freundlich, Langmuir and Redlich-Peterson isotherm equations were applied to the equilibrium sorption data obtained. The sorption dynamics were found to obey the pseudo-second order rate equation and particle diffusions ap...

A recent trend in plasma etching of semi-conductors has been the move towards discharge operation at low pressures of 2-20 mTorr. At these conditions the electron distribution functions shows modest but signi cant deviations from a fully nonlocal distribution. We have developed a model which addresses this regime of modest deviations from the nonlocal case with an efcient numerical scheme to so...

Removal of the widespread used drug paracetamol from water was investigated using activated carbon originated from dende coconut mesocarp and babassu coconut mesocarp. Kinetic and equilibrium data were obtained at different values of pH. Both activated carbons showed high efficiency when pH ≤ pHPZC as the carbonil group of paracetamol molecule are adsorbed due to positively charged carbon surfa...

In the present study, the adsorption behaviors of mordenite (a common zeolite) with respect to Cu 2+ and Ni 2+ from aqueous solutions were investigated. The sorption data followed the Freundlich and Langmuir isotherms. The maximum sorption capacities were found to be 9.778 and 5.371 mg/g at pH 6, initial concentration of 40 mg/L and temperature of 30 for Cu 2+ and Ni 2+ , respectively. The kine...

is well known as the universal model for the description of the unstable envelope of strongly dispersive and weakly nonlinear waves. The other interpretation of ( 1 ) is connected with the nonlinear optics of the focusing media (see, e.9., refs. [ 1-3] ). The field of the important physical applications of the NLS equation is extromely wide. To mention just a few: nonlinear deep water waves [4 ...

Optical second harmonic generation (SHG) is used as a noninvasive probe of two-dimensional (2D) ferroelectricity in Langmuir-Blodgett (LB) films of copolymer vinylidene fluoride with trifluorethylene. The surface 2D ferroelectric-paraelectric phase transition in the topmost layer of LB films and a thickness independent (almost 2D) transition in the bulk of these films are observed in temperatur...

Using a Langmuir-Blodgett (LB) synthesis method, novel two-dimensional (2D) mixed-spin magnetic systems, in which each magnetic layer is both structurally and magnetically isolated, have been generated. Specifically, a 2D Fe-Ni cyanide-bridged network with a face-centered square grid structure has been magnetically and structurally characterized. The results indicate the presence of ferromagnet...