Novel Electron Spectroscopy of Tenuously and Weakly Bound Negative Ions

A novel method is proposed that uses very slow electron elastic collisions with atoms to identify their presence through the observation of tenuously bound (electron impact energy, E<0.1 eV) and weakly bound (E<1 eV) negative ions, formed as Regge resonances during the collisions.Comment: 4pages, 3figure

Low-energy electron scattering from copper

Differential cross sections for the elastic scattering of electrons from the ground states of copper for the configuration 3d10 4s and the excitation state 2D with the configuration 3d9 4s2 have been calculated. Local density approximations to the exchange and correlation potentials have been used in these calculations, and it is confirmed that Hara exchange coupled with a Hedin-Lundqvist electron-gas-type correlation potential joined to an adiabatic polarization potential gives good predictions for differential cross sections. A comparison of the calculated results with other experimental and theoretical data are presented and discussed

Use of Nano-Sensors of the Interferences between Pb((II) with Each of Mg(II), Zn(II), Mn(II), Ca(II), Co(II) and PO4-3 in Blood Medium: An Electrochemical Study

Lead is considered a key element in causing autism disease in children due to the pollution of this dangerous element to human. The aim of this research is to obtain a chemical compound with the effect of inhibiting the oxidation of lead ions on the brain that causes the autism disease. Cyclic voltammetric technique was used to study the effect of interferences between lead ions with selected elements such as Mn(II), Mg(II), Zn(II), Ca(II), PO4-3 and Co(II) in blood medium. Multi wall carbon nano tube (MWCNT) which was modified with glassy carbon electrode (GCE) was used as a working electrode sensor in cyclic voltammetric method. The results showed that the oxidation and reduction current peaks of Pb(II) ions in the blood medium appeared at -0.2 and -0.8 V respectively. It was found that Co(II) ions had a significant effect on the Pb(II) ions in blood medium as anti-oxidative reagent by reducing the anodic current peak of Pb(II) with five folds and enhancing the cathodic current peak. But other ions such as Mn(II), Mg(II), Zn(II), Ca(II) and PO4-3 reduced both redox current peaks of Pb(II) in blood medium. It means that Co(II) ions acted as a good anti-oxidative reagent in blood medium which reduced the effect of lead ions on brain cells by the blood stream. Hence, cobalt compounds could be used as drugs for treatment of the autism disease in children

Rifampicin: Electrochemical Effect on Blood Component by Cyclic Voltammetry Using Nano-Sensor

Rifampicin (RIF) compound was analyzed by electrochemical study using cyclic voltammetric method to characterize the electrochemical properties in blood medium. Glassy carbon electrode (GCE) was modified with carbon nanotubes (CNT) as a high sensitive sensor for using in the electro-analysis of RIF in blood medium. It was found that oxidation and reduction current peaks of RIF in blood medium were at the potential of 0.5 and -0.5 V, respectively. Different concentrations, pH, scan rates, reliability and stability of RIF in blood medium were studied. The diffusion coefficient of oxidation and reduction was determined using the Randles-Seveik equation. The result showed the average value of oxidation and reduction were 2.66 × 10-5 and 8.72 × 10-5 cm2s-1, respectively