نتایج جستجو برای: 4 main indexes and 46 sub
تعداد نتایج: 17084994 فیلتر نتایج به سال:
Abstract Based on the coprecipitation of FeSO 4 (NH ) 2 SO with CuCl and ZnSO , CuFe O ZnFe nanocrystals were successfully synthesized. The morphology crystal structures nanoparticles studied via SEM, TEM XRD, which showed that MFe samples formed aggregated sizes 16 ? 20 nm a narrow dispersion in size. had typical spinel structures. Magnetic analyses demonstrated sample saturation magnetization...
in this research the focus of the researcher is on the influence of american myths that have long been held and offered by the american culture and ideologies. sam shepard is conceived to be one of the greatest playwrights of the contemporary american theater. in his works he depicts broken characters who are struggling to keep up with the national expectations but are ceaselessly borne back to...
the images of muslims in media, literature and politics have been mostly black and white portrayals of a people alien to modernity, civilization, rationality and pluralism. since the end of the cold war and the onset of deadly terrorist attacks in different areas of the world, especially in the united states, these representations show a palpable difference: muslims are represented not only as ...
Borosulfates are an expanding class of silicate-analogous materials. We report the syntheses and crystal structures two unconventional cadmium borosulfates. Cd[B2O(SO4)3] crystallises in a new structure type space group Pnma (no. 62, a=896.92(8), b=1152.0(1), c=872.75(8) pm, 1380 refl., 94 ref. param., wR2=0.112). Cd4[B2O(SO4)6] adapts α-Mg4[B2O(SO4)6]-type with P 147, a=822.22(4), c=797.88(5) ...
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An electrochemical characteristic evaluation of the Ti-Mn electrolyte system in sulfuric acid aqueous solution was conducted different concentrations with and without mixing TiOSO 4 MnSO for a redox flow battery application. The reaction mechanism Mn studied using cyclic voltammetry anodic voltage hold techniques. overall behavior can be described by oxidation 2+ to MnO 2 where 3+ is an interme...
Coexistence of Superconductivity and Ferromagnetism in Superconducting ErRh<sub>4</sub>B<sub>4</sub>
in this thesis, using concepts of wavelets theory some methods of the solving optimal control problems (ocps). governed by time-delay systems is investigated. this thesis contains two parts. first, the method of obtaining of the ocps in time delay systems by linear legendre multiwavelets is presented. the main advantage of the meth...
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