The interaction between eriochrome black T and Li , Na , K ,Mg and Ca ions in acetone and dimethylsulphoxide solutions has been investigated spectrophotometrically. The formation constants of the resulting 1 : 1 complexes were determined and found to decrease in the order Mg >Ca >Li >K >Na in both solvents used. There is an inverse relationship between the stabilities of the complexes...

the interaction between eriochrome black t and li , na , k ,mg and ca ions in acetone and dimethylsulphoxide solutions has been investigated spectrophotometrically. the formation constants of the resulting 1 : 1 complexes were determined and found to decrease in the order mg >ca >li >k >na in both solvents used. there is an inverse relationship between the stabilities of the complexes and the s...

This paper examines the residential preferences of rural Nebraskans. Data from the 1998 Nebraska Rural Poll were analyzed at two levels. First, the residential preferences of rural Nebraskans were compared to those of the general population of the United States. Second, the relationships between the attributes of the respondents’ current community and their residential preferences were examined...

In this letter, it is shown that dark energy is contributed by riccion (a particle concept for physical aspect of the Ricci scalar curvature) in a natural way without any input in the theory for it. In contrast to other models, where an idea for dark energy is introduced in the beginning of the theory, here it emerges from the gravitational sector spontaneously. Interestingly, it is found that ...

An important and largely unstudied aspect of the apparent relation between residential crowding and mental health is the potential role of environmental design to moderate this relation. An epidemiological investigation reveals that the type of housing children inhabit alters mental health correlates of residential crowding. Third and fourth grade Austrian children (n=1,236) from small towns an...

Aerodynamic testing of low-rise structures is fraught with difficulties that can be the cause of large measurement errors, resulting in the underestimation of aerodynamic pressures by a factor of as much as two. The errors are primarily attributable to the inadequate knowledge and simulation of wind flows affecting low-rise buildings, especially residential homes in suburban environments. A typ...

Complexation reactions between methylthymol blue and Fe , A l ,Ga , 1n a nd TI ions have been studied in buffer aqueous solutions of pH 5.0 at 2S°C by a spectrophotometric technique. The conditional stepwise stability constants of the resulting 1:l and 1:2 (metal-to-ligand) complexes were determined from the absorbance-mole ratio data at three different wavelengths of the visible sp...

the vo(iv) complexes of tridentate ono schiff base ligands derived from 2- aminobenzoicacid and salicylaldehyde derivatives were synthesized and characterized by ir, uv–vis and elemental analysis. electrochemical properties of the vanadyl complexes were investigated by cyclic voltammetry. a good linear correlation was observed between the oxidation potentials and the electron-withdrawing charac...