In this paper, we use Prandtl mixing-length theory and semiempirical to extend the classical problem of wind in steady atmospheric Ekman layer with constant eddy viscosity. New generalized equations are established qualitative properties corresponding ODEs studied. Spatial wave solutions results for nonlinear implicit different nonlinearities presented.

Stark widths for spectral lines within 24 multiplets of Zn III singlets and triplets have been calculated using modified semiempirical method an electron density 1017 cm?3 temperatures from 5000 K up to 100,000 K. The obtained results used the investigation influence broadening on in stellar atmospheres considerations width similarites supermultiplets transition arrays.

We present third-order many-body perturbation theory calculations of the Lennard-Jones C3 coefficient for the alkali-metal atoms lithium, sodium, potassium, rubidium, cesium, and francium. All-order singles-doubles calculations of C3 are also presented for lithium, sodium, and potassium. For lithium and sodium the present values of C3 are compared with other theoretical and semiempirical values...

AM1-type semiempirical quantum chemical calculations were carried out to explain differences in herbicidal activity between certain phenoxyacetic acid derivatives. It was found that the proper orientation and shape of the COOH group and the phenyl moiety both mutually and individually affected the observed activities.