Khalid Thajeel - Academia.edu (original) (raw)
Papers by Khalid Thajeel
INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING ICCMSE 2021
Journal of Physics: Conference Series, 2020
Hydroxyapatite Caio(P04)e(OH)2 is an alloplast material that is used to increase bone regeneratio... more Hydroxyapatite Caio(P04)e(OH)2 is an alloplast material that is used to increase bone regeneration. It can be synthesis by processing natural materials such as fish bones. The purpose of this study was to synthesize hydroxyapatite from natural resources skipjack tuna (Katsuwonus pelamis) bones with precipitation method. Then, characterize hydroxyapatite morfology with FESEM and its biocompatibility using the preosteoblast MC3T3-E1 cell line. Skipjack tuna bone was synthesized into hydroxyapatite through precipitation method. The morphology of hydroxyapatite sample was revealed with field-emission scanning microscope FESEM. While the constituent elements were analyzed using SEM EDAX. Biocompatibility of hydroxyapatite was tested using preosteoblast cell culture. Cells were treated with different hydroxyapatite concentration 200 μglml, 100 μglml and 5 μg/ml. After incubation with C02 5% at 37°C for 24h,48h and 72h the cultore was tested for viability using MTT Cell Viability Assay Kit...
The influence of SiC particles on the physical and mechanical properties for MgO/SiC composites w... more The influence of SiC particles on the physical and mechanical properties for MgO/SiC composites was investigated. MgO matrix was reinforced with (2 wt%,4 wt%,6 wt% and 8 wt%) of SiC particles which synthesized using powder technology technique. Five samples of each patch have been prepared and supplied to physical properties (green density (G.D) and bulk density (B.D)) and mechanical properties (hardness and compressive strength) were measured. It was observed that the green density of all samples were decreases with increasing SiC particles content. This due to the lower density of SiC than MgO particles. Prepared samples were sintered at different temperatures (800˚C800˚C, 1100˚C1100˚C, and 1450˚C1450˚C). The bulk density reviled the unaffecting property for samples sintered at 800C and 1100˚C, but it was observed a significant increasing in B.D for samples sintered at higher temperature (1450˚C). It has been found that Vickers hardness, compressive strength and diametrical streng...
The influence of SiC particles on the physical and mechanical properties for MgO/SiC composites w... more The influence of SiC particles on the physical and mechanical properties for MgO/SiC composites was investigated. MgO matrix was reinforced with (2 wt%,4 wt%,6 wt % and 8 wt %) of SiC particles which synthesized using powder technology technique. Five samples of each patch have been prepared and supplied to physical properties (green density (G.D) and bulk density (B.D)) and mechanical properties (hardness and compressive strength) were measured. It was observed that the green density of all samples were decreases with increasing SiC particles content. This due to the lower density of SiC than MgO particles. Prepared samples were sintered at different temperatures (800 ˚C, 1100 ˚C, and 1450 ˚C). The bulk density reviled the unaffecting property for samples sintered at 800C and 1100˚C, but it was observed a significant increasing in B.D for samples sintered at higher temperature (1450˚C). It has been found that Vickers hardness, compressive strength and diametrical strength values in...
Journal of Kufa - Physics, 2011
The influence of SiC particles on the physical and mechanical properties for MgO/SiC composites w... more The influence of SiC particles on the physical and mechanical properties for MgO/SiC composites was investigated. MgO matrix was reinforced with (2 wt%,4 wt%,6 wt% and 8 wt% ) of SiC particles which synthesized using powder technology technique. Five samples of each patch have been prepared and supplied to physical properties (green density (G.D) and bulk density (B.D)) and mechanical properties (hardness and compressive strength) were measured. It was observed that the green density of all samples were decreases with increasing SiC particles content. This due to the lower density of SiC than MgO particles. Prepared samples were sintered at different temperatures (800 ˚C, 1100 ˚C, and 1450 ˚C). The bulk density reviled the unaffecting property for samples sintered at 800C and 1100˚C, but it was observed a significant increasing in B.D for samples sintered at higher temperature (1450˚C). It has been found that Vickers hardness, compressive strength and diametrical strength values inc...
Iraqi Journal of Physics, 2011
Structural and optical properties were studied a s a function of films thickness for thermally ev... more Structural and optical properties were studied a s a function of films thickness for thermally evaporation PbI2 films. X-ray diffraction analysis confirmed that P bI 2 films are polycrystalline having hexagonal structu re. The optical absorption data indicate an allowed direct transmission with optica l energy gap varies continuously from ( 2.15eV to 2.33eV) . The energy gap shows th ickness dependence, which can be explained qualitatively by a thickness depen dence of grain size through the decrease of the grain boundary barrier height with grain size. The low fluctuation in energy gap indicates that the grain size is quit e small, which is finding in agreement with AFM results.
This study aims to investigate the characteristics of optical fiber sensors under X-rays radiatio... more This study aims to investigate the characteristics of optical fiber sensors under X-rays radiation. The Radiation-Induced Absorption (RIA) and Radiation-Induced Refractive-Index Change (RIRIC) in the UV-VIS domain were investigated. Single and multi-mode optical fibers (SMFs & MMFs) have been used for this purpose. The outer diameters of these fibers were reduced from (125 to 50 and 55μm for SMF and MMF respectively) via chemical etching process then dipped into (3 wt % concentration) of germanium (Ge) solution to produce the sensing part of the fibers. Due to the applied X-rays radiation, an attenuation of the spectrum and a redshift in peak wavelength were achieved. Both sensors show good responsivity to the applied radiation and the MMFs sensors showed higher wavelength shifting as compared to SMFs sensors.
INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING ICCMSE 2021
Journal of Physics: Conference Series, 2020
Hydroxyapatite Caio(P04)e(OH)2 is an alloplast material that is used to increase bone regeneratio... more Hydroxyapatite Caio(P04)e(OH)2 is an alloplast material that is used to increase bone regeneration. It can be synthesis by processing natural materials such as fish bones. The purpose of this study was to synthesize hydroxyapatite from natural resources skipjack tuna (Katsuwonus pelamis) bones with precipitation method. Then, characterize hydroxyapatite morfology with FESEM and its biocompatibility using the preosteoblast MC3T3-E1 cell line. Skipjack tuna bone was synthesized into hydroxyapatite through precipitation method. The morphology of hydroxyapatite sample was revealed with field-emission scanning microscope FESEM. While the constituent elements were analyzed using SEM EDAX. Biocompatibility of hydroxyapatite was tested using preosteoblast cell culture. Cells were treated with different hydroxyapatite concentration 200 μglml, 100 μglml and 5 μg/ml. After incubation with C02 5% at 37°C for 24h,48h and 72h the cultore was tested for viability using MTT Cell Viability Assay Kit...
The influence of SiC particles on the physical and mechanical properties for MgO/SiC composites w... more The influence of SiC particles on the physical and mechanical properties for MgO/SiC composites was investigated. MgO matrix was reinforced with (2 wt%,4 wt%,6 wt% and 8 wt%) of SiC particles which synthesized using powder technology technique. Five samples of each patch have been prepared and supplied to physical properties (green density (G.D) and bulk density (B.D)) and mechanical properties (hardness and compressive strength) were measured. It was observed that the green density of all samples were decreases with increasing SiC particles content. This due to the lower density of SiC than MgO particles. Prepared samples were sintered at different temperatures (800˚C800˚C, 1100˚C1100˚C, and 1450˚C1450˚C). The bulk density reviled the unaffecting property for samples sintered at 800C and 1100˚C, but it was observed a significant increasing in B.D for samples sintered at higher temperature (1450˚C). It has been found that Vickers hardness, compressive strength and diametrical streng...
The influence of SiC particles on the physical and mechanical properties for MgO/SiC composites w... more The influence of SiC particles on the physical and mechanical properties for MgO/SiC composites was investigated. MgO matrix was reinforced with (2 wt%,4 wt%,6 wt % and 8 wt %) of SiC particles which synthesized using powder technology technique. Five samples of each patch have been prepared and supplied to physical properties (green density (G.D) and bulk density (B.D)) and mechanical properties (hardness and compressive strength) were measured. It was observed that the green density of all samples were decreases with increasing SiC particles content. This due to the lower density of SiC than MgO particles. Prepared samples were sintered at different temperatures (800 ˚C, 1100 ˚C, and 1450 ˚C). The bulk density reviled the unaffecting property for samples sintered at 800C and 1100˚C, but it was observed a significant increasing in B.D for samples sintered at higher temperature (1450˚C). It has been found that Vickers hardness, compressive strength and diametrical strength values in...
Journal of Kufa - Physics, 2011
The influence of SiC particles on the physical and mechanical properties for MgO/SiC composites w... more The influence of SiC particles on the physical and mechanical properties for MgO/SiC composites was investigated. MgO matrix was reinforced with (2 wt%,4 wt%,6 wt% and 8 wt% ) of SiC particles which synthesized using powder technology technique. Five samples of each patch have been prepared and supplied to physical properties (green density (G.D) and bulk density (B.D)) and mechanical properties (hardness and compressive strength) were measured. It was observed that the green density of all samples were decreases with increasing SiC particles content. This due to the lower density of SiC than MgO particles. Prepared samples were sintered at different temperatures (800 ˚C, 1100 ˚C, and 1450 ˚C). The bulk density reviled the unaffecting property for samples sintered at 800C and 1100˚C, but it was observed a significant increasing in B.D for samples sintered at higher temperature (1450˚C). It has been found that Vickers hardness, compressive strength and diametrical strength values inc...
Iraqi Journal of Physics, 2011
Structural and optical properties were studied a s a function of films thickness for thermally ev... more Structural and optical properties were studied a s a function of films thickness for thermally evaporation PbI2 films. X-ray diffraction analysis confirmed that P bI 2 films are polycrystalline having hexagonal structu re. The optical absorption data indicate an allowed direct transmission with optica l energy gap varies continuously from ( 2.15eV to 2.33eV) . The energy gap shows th ickness dependence, which can be explained qualitatively by a thickness depen dence of grain size through the decrease of the grain boundary barrier height with grain size. The low fluctuation in energy gap indicates that the grain size is quit e small, which is finding in agreement with AFM results.
This study aims to investigate the characteristics of optical fiber sensors under X-rays radiatio... more This study aims to investigate the characteristics of optical fiber sensors under X-rays radiation. The Radiation-Induced Absorption (RIA) and Radiation-Induced Refractive-Index Change (RIRIC) in the UV-VIS domain were investigated. Single and multi-mode optical fibers (SMFs & MMFs) have been used for this purpose. The outer diameters of these fibers were reduced from (125 to 50 and 55μm for SMF and MMF respectively) via chemical etching process then dipped into (3 wt % concentration) of germanium (Ge) solution to produce the sensing part of the fibers. Due to the applied X-rays radiation, an attenuation of the spectrum and a redshift in peak wavelength were achieved. Both sensors show good responsivity to the applied radiation and the MMFs sensors showed higher wavelength shifting as compared to SMFs sensors.