Abdulrahman Ismael Ahmed

University of Al-Hamdaniya · Department of Physics

A number of materials based on biocompatible polymers (polyvinylpyrrolidone and sodium alginate) with hydroxyapatite and dicalcium phosphate dihydrate were developed. The properties of prepared materials were studied by IR and EPR spectroscopies depending on the composition and method of synthesis of calcium phosphates. The introduction of calcium...

Today, the synthesis of biocompatible and bioresorbable compositematerials such as “polymer matrix-mineral constituent,” which stimulate the natural growth of living tissues and the restoration of damaged parts of the body, is one of the challenging problems in regenerative medicine. In this study, composite films of bioresorbable polymers of polyv...

Composites of hydroxyapatite (HA) with polyvinylpyrrolidone (PVP) were synthesized by precipitation in water solutions, mass relations of HA/PVP varied in region 3,6-14,5. The composite materials were investigated using XRD, IR, electron paramagnetic resonance (EPR) spectroscopy and transmission electron microscopy (TEM). Based on the TEM results i...

A simple self-consistent kinetic model for electrons is presented. This model is based on the solution of Boltzmann transport equation for electron energy distribution function and values of electron transport coefficients such as drift velocity, mean electron energy, diffusion coefficient, mobility and ionization coefficient, determined numericall...