Sarcostemma acidum (Roxb.) Voigt is a valuable medicinal plant to treat number of diseases in India. Four compounds were isolated from the whole S. acidum. The structures characterized as Friedelin (1), ?-amyrin (2), ?-sitosterol (3) and 4?-Carboxy-4?-methyl-5?-cholesta-8,24-dien-3?-ol (4) by extensive spectroscopic (NMR, FT-IR mass) analysis compared their spectral data with literature. vitro ...

Although the fundamental, theoretical peak shape in X-ray photoelectron spectroscopy (XPS) is Lorentzian, some Gaussian character observed most XPS signals. Additional complexity form of asymmetry also found many signals, which requires more advanced shapes than traditional, symmetric Voigt and Gaussian-Lorentzian sum product (pseudo-Voigt) functions. Here, we discuss merits disadvantages four ...

We investigate the stabilization of a locally coupled wave equations with only one internal viscoelastic damping Kelvin-Voigt type (see System (1.2)-(1.4)). The main novelty in this paper is that both and coupling coefficients are non smooth (1.5)). First, using general criteria Arendt-Batty, combined an uniqueness result, we prove our system strongly stable. Next, spectrum approach, non-expone...

We construct solutions of the magnetohydrostatic (MHS) equations in bounded domains and on torus three spatial dimensions, as infinite time limits Voigt approximations viscous, non-resistive incompressible magnetohydrodynamics equations. The modify evolution without introducing artificial viscosity. show that obtained MHS are regular, nontrivial, not Beltrami fields.