The correlation of the electrocatalytic activity with electrical conductivity, oxygen-vacancies, and electronegativity have been studied in a series isostructural oxides, having so-called Ruddlesden-Popper structure. structures these materials comprise transition metals that are octahedrally coordinated to form network bilayer stacks. These catalytically active for both half-reactions water-spl...

The capacitively coupled Ar plasma containing oxygen, driven by a radio frequency of 27.12 MHz, is investigated laser-induced photo-detachment technique assisted with Langmuir probe. plasmas different amounts oxygen are obtained changing the flow and each which controlled mass controller. axial distribution characteristic can be measured relative position probe between parallel electrodes. elec...

The discovery of the extremely shallow amorphous boron-crystalline silicon heterojunction occurred during development highly sensitive, hard and robust detectors for low-penetration-depth ionizing radiation, such as ultraviolet photons low-energy electrons (below 1 keV). For many years it was believed that junction created by chemical vapor deposition boron on n-type crystalline a p-n junction,...

Fluoride has long been known to influence the activity of various enzymes in vitro. Latterly it has been demonstrated that many effects primarily attributed to fluoride are caused by a synergistic action of fluoride plus aluminum. Fluorinated chemicals are of growing importance, with applications in medicine. Fluorine substitution has profound effects on the properties of organic compounds. The...

Improving problem-solving skills is a basic requirement in present education. Logic programming languages, often used in the area of artificial intelligence and expert systems, are very much suitable for developing problemsolving skills. This paper presents a computer-based tool for solving different chemical problems (calculation of quantum numbers, description of electron configurations of at...

Electrostatic probe measurements for low-pressure inductively coupled SF(6) plasmas are performed. From the current-voltage (I-V) curves of probe, the saturation currents of the positive ions and electrons and the electron temperature are measured. The electronegativity and the negative ion density are deduced by using the ratios of these parameters at three adjacent pressure points. The positi...

Knowledge of the electronic structure and properties of element 114 is important for its chemical identification. By comparing its behaviour with that of the lighter group 14 homologues, its position in the periodic table can be confirmed. In this work, we investigate the electron affinity (EA) of element 114, together with its lighter homologues in group 14, Sn and Pb [1]. Electron affinity is...

Abstract We review the early works which were precursors of Conceptual Density Functional Theory. Starting from Thomas–Fermi approximation and exact formulation Theory by Hohenberg Kohn’s theorem, we will introduce electronegativity theory hard soft acids bases. also present a general introduction to Fukui functions, their relation with nucleophilicity electrophilicity, an emphasis towards impo...

A novel approach that combines neural networks, computer docking and quantum mechanical method is developed to design potent aldose reductase inhibitors (ARIs). Neural networks is employed to determine the quantitative structure-activity relationship (QSAR) among the known ARIs. The physical descriptors of the neural networks, such as electronegativity and molar volume, are evaluated with first...

An attempt is made to explain the E-C formalism for ionic interactions in terms of the ionic approximation to chemical bonding. Dravo's E-C equation is seen to be a first approximation to the bond energy equation as it is given by the ionic bonding approach. The meaning of the ratio C/E is discussed and its relation with the hardness and softness of interacting species, as these occur in Pearso...