Using simple wave functions based on the asymptotic behavior and on the binding energies of the valence electron, we have evaluated multipolar matrix elements. They allow us to obtain polarizabilities up to ␣ 12 of Li, Na, K, Rb, Cs, Be ϩ , Mg ϩ , Ca ϩ , Sr ϩ , Ba ϩ , and dispersion coefficients of homonuclear and heteronuclear interactions from c 6 to c 24 . Comparisons with previously determined low order quantities show that this approach is capable of yielding quite useful values for these quantities.

No abstract

We have developed perturbative expressions for the adiabatic potential for alkali-inert gas systems. The predictions of the model for the equilibrium separation Rm and the minimum potential em are in good agreement with the experimental values. The model provides a unified approach to the interaction potential which indicates a conformal structure for some groups, implying a useful relation between R m , em' and van der Waals constant C 6 •

A simple nonvariational wave function for two electron atoms is described. The radial part is derived from the asymptotic one-electron wave functions that are modified to account for the proper core boundary conditions. The electron-electron correlation is described by an ansatz which has the correct behavior for r 12 →0 and r 12 →ϱ. The additional parameter in this ansatz is calculated from a perturbation calculation. This wave function yields ground-state energies for the heliumlike atoms with Zϭ1 (H Ϫ ) to 10 (Ne 8ϩ ) within 0.0021-0.0068E h of the exact energies, which is significantly better than obtained with previous models. We also calculated ͗r 2n ͘ and multipolar polarizabilities and performed other tests on this wave function.

Abstract:Pleurotus sajor-caju (Fr.) Singer was cultivated on selected agro wastes viz. cotton stalks, groundnut haulms, soybean straw, pigeon pea stalks and leaves and wheat straw, alone or in combinations. Cotton stalks, pigeon pea stalks and wheat straw alone or in combination were found to be more suitable than groundnut haulms and soybean straw for the cultivation. Organic supplements such as groundnut oilseed cake, gram powder and rice bran not only affected growth parameters but also increased yields. Thus bioconversion of lignocellulosic biomass by P. sajor-caju offers a promising way to convert low quality biomass into an improved human food.