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Articles by Ayad F. Alkaim
Total Records ( 4 ) for Ayad F. Alkaim
  Dalia M. Jamil , Ahmed K. Al-Okbi , Mahdie M. Hanon , Khalid S. Rida , Ayad F. Alkaim , Ahmed A. Al-Amiery , Abdulhadi Kadhim and Abdul Amir H. Kadhum
  Inhibitor for mild steel derived from carbethoxythiazole namely 2-amino-4-methyl-5-carbethoxythiazole was synthesized and the chemical structure was elucidating by fourier transform in frared and nuclear magnetic resonance spectroscopies. The inhibition efficiency for 2-amino-4-methyl-5-carbethoxythiazole to inhibit the damage effects for mild steel of corrosion in 1 M hydrochloric acid solution was figured and was 82.5% regarding to weight loss technique. Scanning electron microscopy was used as a confirmation of ability of 2-Amino-4-Methy l-5-Carbethoxythiazole (AMC) to inhibit the corrosion of specimens of mild steel surface. The standard free energy of adsorption and adsorption equilibrium constant were calculated and the adsorption of 2-amino-4-methy l-5-carbethoxythiazole on surface of mild steel was obey adsorption isotherm of Langmuir. To proof the methodological findings, density function theory at the B3LYP/6-311+G** level of theory was used to calculate highest occupied with lowest unoccupied molecular orbitals energies and dipole moment.
  Khalid Haneen Abass , Mohammed Hadi Shinen and Ayad F. Alkaim
  The aim of this research is to prepare TiO2 films on Indium Tin Oxid (ITO)-glass substrates with various nano-layers via. sol-gel method and study the properties that make these films suitable for solar cell application. Polycrystalline TiO2 films are resulting from X-Ray Diffraction (XRD) examination with preferred orientation along (101) plane appear for the films with thickness more than 107 nm (3 layers) at 2θ = 25.62°. Other peaks appear (211), (004) and (200) at 2θ = 30.27, 35.49 and 48.69, respectively and the crystallite size ranged from 15-32 nm for the prepared films. The homogeneity of the films is appear from the scanning electron microscope in addition of smooth and free of pinholes. UV-Visible spectrophotometer use to recording the transmittance spectra in the range of 360-1000 nm. The energy gaps were determined by Touc Model and from the dispersion parameters which found good comparable to be 3.21 eV for the film thickness 155 nm (5 layers). The energy loss of electrons which travelling through surface and bulk of material also determined. Urbach energy is increase with the increasing of film thickness. Dispersion parameters (Eo, Ed) determined from Wemple and DiDomenco relationship.
  Slafa I. Ibrahim , Khalid S. Rida , Ahmed A. Al-Amiery and Ayad F. Alkaim
  The research included the study of the spectral properties of Rhodamine C dissolved in 1-butanol in different concentrations (7*10–6, 1*10–5, 3*10–5, 5*10–5, 7*10–5 mol/L) at ambient temperature and studies its nonlinear properties with the calculation of some parameter like "Nonlinear refractive index" and the "Nonlinear absorption coefficient" in addition to select one of these concentrations (7*10–6 mol/L) to study the effect of changing the pinhole diameter on some of these parameter.
  Kareem Hussein Jwad , Nehia Neama Hussein , Buthenia Abd-Alhamza , Ahmed A. Al-Amiery and Ayad F. Alkaim
  This study aimed to determinate the antibacterial activity and cytotoxic effects (Fe3O4 NPs). Antimicrobial activity against pathogenic microbes which obviously indicates that Fe3O4 NPs are considered an valuable antimicrobial agents. The (G +ve bacteria) S. aureus were more susceptible to iron oxide nanoparticles when compared to the E. coli and P. aeruginosa (G -ve bacteria). Results indicate that inhibitory activity of iron oxide nanoparticles increases with increase of the Fe3O4 NPs concentrations. Fe3O4 NPs was not effect on every cells but through an suitable magnetic field of iron oxide as for the detection of the toxicity of nanoparticles it was observed that it had toxicity to red blood cells through the complete haemolysis. The current study concluded the Fe3O4 NPs can effects on the inflammatory response that which cause the oxidative stress and may negatively affect the cellular function and Fe3O4 NPs in high concentrations have a hemagglutinated.
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