Publications by authors named "Y S Rammah"
The sonication method was used to prepare a new set of CuO and CuO/Ag nanocomposites. The particle size was estimated using XRD and HR-TEM while the morphology of the nanoparticles was investigated with SEM. The average particle sizes of CuO and Ag falls in the 29.
View Article and Find Full Text PDFLead borate glass is the best radiation shielding glass when lead is in high concentration. However, it has low transparency after radiation exposure. Radiation decreases transparency due to chemical and physical changes in the glass matrix, such as creating or healing defects in the glass network.
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- Researchers produced borosilicate glasses doped with CeO and GdO from municipal solid waste ashes, using a melting-quenching method, and studied their properties after exposure to 100 kGy of gamma radiation.
- Optical data showed distinct UV peaks and luminescence changes, indicating that Gd ions enhance the luminescence of Ce ions, while FTIR analysis revealed a complex interaction between silicate and borate structures in the glass matrix.
- The glasses demonstrated stability in optical and structural properties after radiation exposure, with improved hardness and effective radiation shielding, suggesting that using waste ashes for this purpose is both beneficial and economical.
The present work was conducted to characterize the mangrove sediments along the Egyptian Red Sea in terms of elemental composition and to assess the extent of pollution and its sources. A total of 26 samples of mangrove sediments were collected from three different areas: Sharm El Madfea, Sowmaa Mangrove and Abu Fasi. The samples were analyzed using the inductively coupled plasma - mass spectrometry ICP-MS and atomic-emission spectrometry ICP-AES.
View Article and Find Full Text PDFWO effects on neutron and ionizing radiation defending factors of ternary tellurite-based glass blocks with molecular formula 80TeO -(20-x)WO - xKO; x = 0-20 mol% (denoted as TKW-glass) has been reported via Phy-X theoretical calculations and Geant4 simulation code. Correlations between shielding factors and kinetics properties of the investigated glasses at different photon energy have been examined. The highest values of mass (MAC) attenuation coefficient were noted at 15 keV of the examined TKW-glass materials with the values of 38.
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