Publications by authors named "Ahmed Al-Osta"
This study was conducted in Lahij city, Yemen, to evaluate the concentrations and potential health risks of natural radioactive nuclides and heavy metals in soil and drinking water. A total of 21 soil samples and 17 water samples were collected from various locations. A high-purity germanium gamma detector HPGe was used to measure the concentrations of K, Th, and Ra in all samples, along with the concentrations of heavy metals.
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- The paper systematically reviewed 26 articles from 13 regions in Yemen to examine both natural and enhanced artificial radioactivity (NORM and TENORM).
- It analyzed various sample types—such as air, water, soil, and building materials—along with the detectors used and the timeframes of the studies.
- The results revealed concerning high radioactivity levels in many areas, with some regions lacking previous research, highlighting the need for further studies on potential radionuclide concentrations.
Article Synopsis
- MgO-BiCrO nanocomposites with compositions x = 0 and 0.07 were created using a solvent-deficient method and analyzed using techniques like X-ray diffraction and UV-Vis spectroscopy.
- The non-doped sample exhibited a monoclinic crystalline structure without MgO peaks, while the Cr-doped sample showed a smaller crystallite size and two distinct energy gaps in its optical properties.
- Antibacterial tests revealed that Cr-doping reduced the effectiveness of the MgO-BiCrO nanocomposites against various bacteria, including Salmonella and Staphylococcus.
In the present study, beta-cobalt hydroxide (β-Co(OH)) electrodes of various nanostructures and surface areas, viz. nano-rhombuses (NRs), nano-plates (NPs), and nano-grass (NGs), have been synthesized directly onto a stainless-steel (SS) substrate using a simple, economical and binder-free chemical solution-process, utilizing three cobalt precursor salts, i.e.
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