Authors:Rajendra K. Jain, A. P. Mishra, and Priya Gupta
Association of a metal ion with an organic ligand through a chemical bond, changes drastically the properties of ligand and metal. It stabilizes the system and changes the solubility and reactivity. Metal complexes
We introduce the effective Lagrangian with spontaneously broken density in the Sethna-Sachdev-Nelson formula, and propose one explanation for the increase of the positron diffusion lengthL+ in the liquid metal phase with temperature. It is shown that the effective mass of the positron in the liquid metal phase will decrease due to the restoration of the spontaneously broken density around the positron, when temperature increases.
An experiment demonstrated the possibility of developing a zone refining process that would produce the first plutonium metal
of extremely high purity. Plutonium rods containing known amounts of impurities were melted inside tantalum boats and passed
horizontally through a three-turn, high-frequency coil so as to cause a narrow molten zone to pass through each rod 10 times.
The impurity elements cobalt, chromium, iron, nickel, neptunium, and uranium moved in the same direction as the molten zone,
as predicted; the elements aluminum, americium, and gallium moved in the opposite direction of the molten zone, as predicted.
As the impure alloy was zone refined, δ-phase plutonium metal crystals formed.
Hydrazinium metal ethylenediaminetetraacetate complexes of molecular formula (N2H5)2[Mg(edta)·H2O], (N2H5)3[Mn(edta)··H2O](NO3)·H2O, N2H5[Fe(edta)·H2O], N2H5[Cu(Hedta)·H2O] and N2H5[Cd(Hedta)·H2O]·H2O have been synthesized and characterized by elemental and chemical analysis, conductivity and magnetic measurements and spectroscopic
The thermal behaviour of these complexes has been studied by thermogravimetry and differential thermal analysis. The data
set provided by the simultaneous TG-DTA curves of the complexes shows the occurrence of three or four consecutive steps such
as dehydration, ligand pyrolysis and formation of metal oxides. X-ray powder diffraction patterns of copper and cadmium complexes
show that they are not isomorphous. These studies suggest seven coordination for Mg,Mn, Fe complexes and six coordination
for Cu and Cd derivatives.
Authors:Alexey Tymoshenko, Gennadii Tkach, Vitalii Sikora, Valentina Bumeister, Ihor Shpetnyi, Mykola Lyndin, Olena Maksymova, and Anna Maslenko
effect on all biological species  . Direct or indirect intake of different contaminants can cause a disease or become a reason for the development of related disorders [2, 3] .
Heavy metals are considered to be terribly dangerous for their
Authors:Hanan F. Abd El-Halim, F. A. Nour El-Dien, Gehad G. Mohamed, and Nehad A. Mohamed
azolidene carbenes to function as ligands in transition-metal complexes is well-established [ 10 , 11 ]. Consequently, biologically relevant molecules containing azoles are candidates as carbine sources for metal complexation. We consider the utilization of
Authors:Nashaat N. Nassar, Azfar Hassan, and Pedro Pereira-Almao
effect of nanoparticles toward asphaltene cracking has to be determined. Our previous studies have provided information on the catalytic effect of transition metal oxide nanoparticles toward asphaltene gasification and oxidation [ 2 , 6 , 7 , 12