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El-Kholy, Entesar Mohamed,Basher, Mohamed Esmail Mohamed,El-Deen, Mohamed Ramadaan Zeen 충청수학회 2005 충청수학회지 Vol.18 No.2
In this paper we introduced the concept of perfect folding defined on $E^2$ which equipped by perfect k-coloring of r-monohedral tillings. Then we studied the different cases of perfect foldings of 4-monohedral and 3-monohedral tillings of $E^2$. Also the permutations describe each folding are obtained.
Ali E. El-Kholy,Taher S. Kassem,Mohammed K. Obada,Mohamed E. Mahmoud 한국공업화학회 2012 Journal of Industrial and Engineering Chemistry Vol.18 No.6
Layer-by-layer (LbL) chemical deposition technique was successfully implemented as a low cost and efficient methodology for adsorptive removal of Mn(II)–Mn(VII) from aqueous and nonaqueous matrices. Several factors showed significant contributions to the adsorption process of Mn(II) such as solution pH,deposition area, reaction temperature, dipping cycles, dipping time and metal ion concentration. Mn(VII)was reduced via a green chemical process by the action of oxalic acid in an acidic medium to the corresponding Mn(II) and extracted in its reduced form. The potential applications of LbL for static adsorptive removal of Mn(II)–Mn(VII) from aqueous and nonaqueous samples were established.
Short and Long RC Columns with Internal WWM Reinforcement under Concentric and Eccentric Compression
Ahmed M. El-Kholy,Safaa F. Abd El-Rahman,Mohamed M. El-Assaly 한국콘크리트학회 2023 International Journal of Concrete Structures and M Vol.17 No.3
Recently, various types of steel meshes were used as additional internal reinforcement for improving the confinement, ductility, and strength of the reinforced concrete (RC) columns. In this experimental study, a welded wire mesh (WWM) layer was used as an internal reinforcement in addition to the traditional steel reinforcement (longitudinal bars and transverse ties) for short and long RC columns under concentric and eccentric compression. Thirty-six square RC columns with two slenderness ratios λ (height to width ratio) of 9 and 18 were tested under compression with eccentricity ratios e/t (eccentricity to section thickness ratio) of 0, 0.13, and 0.26. The reference columns were traditionally reinforced with longitudinal steel bars and transverse ties with a reference volumetric ratio ρr of 0.44%. The other columns comprised a WWM layer wrapped outside the ties whose volumetric ratio ranged from 0.22% to 0.44%. The results demonstrated that the columns reinforced with a WWM layer in addition to traditional reinforcement showed an improvement in ductility and strength compared to those reinforced with longitudinal bars and transverse ties only. A WWM layer increased the ultimate load of the columns comprising ρr ties by approximately 16% and 9% for short and long columns, respectively. These improvements were proportional to the ties volumetric ratio.
E.M. El-Kholy,M.E.M. Basher,M. R. Z. El-Deen 충청수학회 2005 충청수학회지 Vol.18 No.2
In this paper we introduced the concept of perfect folding defined on E$^2$ which equipped by perfect k-coloring of r-monohedral tillings. Then we studied the different cases of perfect foldings of 4-monohedral and 3-monohedral tillings of E$^2.$ Also the permutations describe each folding are obtained.
Entesar Mohamed El-Kholy,Mohamed Esmail Mohamed Basher,Mohamed Ramadaan Zeen El-Deen 충청수학회 2005 충청수학회지 Vol.18 No.2
In this paper we introduced the concept of perfect folding defined on E 2 which equipped by perfect k-coloring of r-monohedral tillings. Then we studied the different cases of perfect foldings of 4-monohedral and 3-monohedral tillings of E 2 . Also the permutations describe each folding are obtained.
Finite element simulation for steel tubular members strengthened with FRP under compression
Ahmed M. El Kholy,Sherif A. Mourad,Ayman A. Shaheen,Yomna A. Mohamed 국제구조공학회 2019 Structural Engineering and Mechanics, An Int'l Jou Vol.72 No.5
Tubular steel sections are widespread all over the world because of their strength and aesthetic appearance. Tubular steel members may exhibit local buckling such as elephant foot or overall buckling under extreme compression load. Recently, external bonding of fiber reinforced polymers (FRP) sheets for strengthening these members has been explored through experimental research. This paper presents three-dimensional nonlinear finite element analysis (FEA) to investigate the structural behavior of strengthening tubular steel members with FRP against local and overall buckling phenomena. Out-of-roundness and out-of-straightness imperfections were introduced to the numerical models to simulate the elephant foot and overall buckling, respectively. The nonlinear analysis preferences such as the integration scheme of the shell elements, the algorithm for solution of nonlinear equations, the loading procedure, the bisection limits for the load increments, and the convergence criteria were set, appropriately enough, to successfully track the sophisticated buckling deformations. The agreement between the results of both the presented FEA and the experimental research was evident. The FEA results demonstrated the power of the presented rigorous FEA in monitoring the plastic strain distribution and the buckling phenomena (initiation and propagation). Consequently, the buckling process was interpreted for each mode (elephant foot and overall) into three sequential stages. Furthermore, the influence of FRP layers on the nonlinear analysis preferences and the results was presented.
Maha Raafat Abd El Fadeel,Ashraf Taha El-Dakhly,Ahmad Mohammad Allam,Tarek Korany Farag,Alaa Abdel-Moneim El-kholy 대한백신학회 2020 Clinical and Experimental Vaccine Research Vol.9 No.2
Purpose: Bovine respiratory disease is a worldwide health concern in the feedlot cattle causing morbidity and mortality in young with major economic losses to the producer. Programs of vaccination are integral parts of preventive health programs. We aim to prepare and evaluate lyophilized combined inactivated viruses (bovine viral diarrhea virus [BVDV] genotypes 1 and 2, bovine herpes virus type 1.1 [BoHV-1.1], bovine parainfluenza-3 virus [BPI-3V], and bovine respiratory syncytial virus [BRSV]) vaccine using saponin as a solvent and adjuvant in cattle. Materials and Methods: Lyophilized Pneumo-5 vaccine was formulated to include the inactivated BVDV genotypes 1 and 2, BoHV-1.1, BPI-3V, and BRSV. The saponin solution was used as an adjuvant and solvent. The prepared vaccines were adjusted to contain 1- and 1.5-mg saponin/dose. It was evaluated for its sterility, safety, and potency in mice and calves. The antibody titers in vaccinated calves were measured by virus neutralization test and enzyme-linked immunosorbent assay (ELISA). Results: The Pneumo-5 vaccine was found to be free from any contaminants and safe in mice. Meanwhile, the vaccine showed safety in calves which inoculated intramuscularly with the double dose of the vaccines. The overall immune response reached its peak in the 2nd-month post-vaccination. The vaccine contained saponin 1.5 mg/dose reached its antibodies peak in the 4th-week post-vaccination. All groups of vaccinated calves with both concentrations of the saponin did not show statistical significance in antibody titers measured by serum neutralization test and/or ELISA. Conclusion: The prepared vaccine, namely Pneumo-5, and adjuvanted with either 1 or 1.5 mg/dose saponin was proved safe and potent for effectual protection of calves against BVDV genotypes 1 and 2, BoHV-1.1, BPI-3V, and BRSV.
Novel Synthesis of Imidazo[1,2-b]Pyrazoles and Their Fused Derivatives
Sherif, Sherif-M.,Hussein, Abdel-HaLeem-M.,El-kholy, Yehya-M. The Pharmaceutical Society of Korea 1994 Archives of Pharmacal Research Vol.17 No.5
4-Arylazo-1H-pyrazol-3, 5-idimines 1a-c reacted with bromomalononitrile (2) to yield the corresponding imidazo[1, 2-b]pyrazoles 3a-c. The latter reacted with some active methylene compounds and with .alpha.-cinnamonitriles to afford the corresponding pyrazoloimidazopyridines 6, 8, 9 and 15, respectively. Compounds 3 reacted with each of formic acid, formamide, trichlo-roacetonitrile and with guanidine to yield the corresponding pyrazoloimidazopyrimidines 16-19 respectively.
Nagwa S. M. Aly,김혜숙,Maysa A. Eraky,Asmaa A. El Kholy,Basma T. Ali,Shin-Ichi Miyoshi,Rabab E. Omar 대한기생충학ㆍ열대의학회 2023 The Korean Journal of Parasitology Vol.61 No.3
Schistosomiasis causes significant morbidity and mortality worldwide. This study aimed to assess the effect of schistosomula lung antigen preparation (SLAP) and soluble egg antigen (SEA) on a murine schistosomiasis mansoni model. Ninety laboratory-bred male Swiss albino mice were divided into 6 groups. Two doses of the vaccine were given at 2-week intervals. All mice were subcutaneously infected with 80±10 Schistosoma mansoni cercariae 2 weeks after the last vaccination dose. They were sacrificed 7 weeks post-infection. Parasitological and histopathological studies were conducted to assess the effect of inoculated antigens (single or combined). The results showed that the combination of SLAP and SEA (combination group) led to a significant reduction in worm burden (65.56%), and liver and intestine egg count (59% and 60.59%, respectively). The oogram pattern revealed a reduction in immature and mature eggs (15±0.4 and 10±0.8, respectively) and an increased number of dead eggs in the combination group (P<0.001). In terms of histopathological changes, the combination group showed notably small compact fibrocellular egg granuloma and moderate fibrosis in the liver. A high percentage of destroyed ova was observed in the intestine of the combination group. This study demonstrates for the first time the prophylactic effect of combined SLAP and SEA vaccine. The vaccine induced a significant reduction in the parasitological and pathological impacts of schistosomiasis mansoni in hepatic and intestinal tissues, making it a promising vaccine candidate for controlling schistosomiasis.