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Search Results: 1 - 10 of 2959 matches for " Hany Abdel Gawwad Soliman "
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Four Levels Anterior Cervical Discectomy and Fusion by Stand Alone PEEK Cages  [PDF]
Islam Alaghory, Hany Abdel Gawwad Soliman, Saeed Mostafa Abdelhameed
Open Journal of Modern Neurosurgery (OJMN) , 2018, DOI: 10.4236/ojmn.2018.82014
Abstract:

Background: cervical spondylotic myelopathy is a common health problem that neurosurgeons face in Egypt. The aim of this study is to evaluate the efficacy of PEEK cage only in 4 levels anterior cervical discectomy as one of surgical option other than anterior cervical corpectomy, fixation by plat or posterior approach for cervical laminectomy, and assessment of post spinal surgery pain. Methods: this prospective study on 28 patients with cervical spondylotic myelopathy (CSM) over a period of 3 years (between April 2012 and April 2015) with mean period of follow up 30 months. We have done anterior cervical discectomy with fixation by cage only for all cases with perioperative assessment and scoring clinically and radiologically (Japanese Orthopaedic Association [JOA] scores, Visual Analogue Scale [VAS] scores for assessment of neck and arm pain, perioperative parameters (hospital stay, blood loss, operative time), the European Myelopathy Scoring (EMS) and Odom’s criteria, and the incidence of complication,post spinal surgery pain assessment). Results: clinical outcome was excellent (28.55), good (50%) and fair (21.5) according to Odom criteria. The European Myelopathy Scoring (EMS), improved from 10 to 16. The mean JOA score improved from 10.1 ± 2.1 to 14.2 ± 2.3. Fusion failure had been seen in 4 patients in one level for each secondary to anterior displacement of the cage with no other major complications. Conclusion: 4 levels anterior cervical discectomy with PEEK cage only is an effective, save and less costly with less post operative complication and hospital stay and less post spinal surgery pain.

Exploring Hepatotoxicity of Benomyl: Histological and Histochemical Study on Albino Rats
Saber A. Sakr,Hany A. Abdel Samei,Maha E. Soliman
Journal of Medical Sciences , 2004,
Abstract: Benomyl, a fungicide of the benzimidazole group applied against a wide range of fungal diseases of crops and vegetables. The effects of benomyl on the hepatic tissue of albino rats were investigated. Treating rats with benomyl at a dose level of 1/10 LD50 three times/week for three weeks induced various histopathological changes in the liver, such as hepatic tissue impairment, cytoplasmic vacuolization of the hepatocytes, leucocytic infiltrations, congestion of blood vessels and fatty degeneration. Histochemical investigations revealed reduction in total carbohydrates, total proteins and nucleic acids (DNA, RNA) in the hepatic cells. These alterations were time-dependent and were obvious in animals treated with benomyl for 3 weeks. It is speculated that one or more metabolites of benomyl may be responsible for the hepatotoxicity recorded in the present work.
3D structure prediction of replication factor C subunits (RFC) and their interactome in Arabidopsis thaliana
Mohamed Ragab Abdel Gawwad,Jasmin Sutkovic,Emina Zahirovic, et al.
Network Biology , 2013,
Abstract: DNA stress can causes potentially spontaneous genome damage during DNA replication process. Proteins involved in this process are DNA-dependent ATPases, required for replication and repair. In this study the 3-D structure of RFC protein subunits in Arabidopsis thaliana: RFC1, RFC2, RFC3, RFC4 and RFC5 are predicted and confirmed by Ramachadran plot. The amino acid sequences are highly similar to the sequences of the homologous human RFC 140-, 37-, 36-, 40-, and 38 kDa subunits, respectively, and also show amino acid sequence similarity to functionally homologous proteins from E. coli. All five subunits show conserved regions characteristic of ATP/GTP-binding proteins and have significant degree of similarity among each other. The segments of conserved amino acid sequences that define a family of related proteins have been identified. RFC1 is identical to CDC44, a gene identified as a cell division cycle gene encoding a protein involved in DNA metabolism. Subcellular localization and interactions of each protein RFC protein subunit is determined. It subsequently became clear that RFC proteins and their interactome have functions in cell cycle regulation and/or DNA replication and repair processes. In addition, AtRFC subunits are controlling the biosynthesis of salicylic and salicylic acid-mediated defense responses in Arabidopsis.
Functional interactome of Aquaporin 1 sub-family reveals new physiological functions in Arabidopsis Thaliana
Mohamed Ragab Abdel Gawwad,Jasmin Sutkovic,Lavinija Matakovic, et al.
Network Biology , 2013,
Abstract: Aquaporins are channel proteins found in plasma membranes and intercellular membranes of different cellular compartments, facilitate the water flux, solutes and gases across the cellular plasma membranes. The present study highlights the sub-family plasma membrane intrinsic protein (PIP) predicting the 3-D structure and analyzing the functional interactome of it homologs. PIP1 homologs integrate with many proteins with different plant physiological roles in Arabidopsis thaliana including; PIP1A and PIP1B: facilitate the transport of water, diffusion of amino acids and/or peptides from the vacuolar compartment to the cytoplasm, play a role in the control of cell turgor and cell expansion and involved in root water uptake respectively. In addition we found that PIP1B plays a defensive role against Pseudomonas syringae infection through the interaction with the plasma membrane Rps2 protein. Another substantial function of PIP1C via the interaction with PIP2E is the response to nematode infection. Generally, PIP1 sub-family interactome controlling many physiological processes in plant cell like; osmoregulation in plants under high osmotic stress such as under a high salt, response to nematode, facilitate the transport of water across cell membrane and regulation of floral initiation in Arabidopsis thaliana.
Electrochemical Deposition and Optimization of Thermoelectric Nanostructured Bismuth Telluride Thick Films  [PDF]
Hesham M. A. Soliman, Abdel-Hady B. Kashyout
Engineering (ENG) , 2011, DOI: 10.4236/eng.2011.36079
Abstract: Bismuth telluride thick films are suitable for thermoelectric (TE) devices covering large areas and operating at small-to-moderate temperature differences (20 - 200 K). High efficiency and high coefficient of performance (COP) are expected to be achieved by using thick films in some cooling applications. Bismuth telluride thick films fabrication have been achieved with Galvanostatic and Potentionstatic deposition. Stoichiometric bismuth telluride thick film was obtained by Galvanostatic deposition at current density of 3.1 mAcm-2. Bismuth telluride films with average growth rate of 10 µmh-1 and different composition were obtained. Effects of current density and composition of electrolyte in Galvanostatic deposition were studied. The current density affected the film compactness, where films deposited at lower current density were more compact than those deposited at higher current density. The morphology of the films did not depend on the current density, but chemical composition was observed when different composition of electrolyte was used. Effects of distance between electrodes, composition of electrolyte solution, and stirring in Potentionstatic deposition were studied. The shorter the distance between electrodes, the higher the electric field, thus the higher current density was applied and the deposited film was less compact. The current density increased more rapidly with stirring during electrodeposition which leads to less compact film. Through this study, films electrode-posited from solution containing 0.013 M Bi(NO3)3.5 H2O, 0.01 M TeO2 and 1 M HNO3 at 3.1 mA cm-2 for 6 hours without stirring and with interelectrode distance of 4.5 cm were free-standing with average film thickness of 60 µm and optimum film composition of Bi2Te3. The crystallite size of the later films was found to be around 4.3 nm using Scherrer’s equation from XRD patterns. Also, negative Seebeck coefficient for the same samples was revealed with an average value of -82 μV.K-1.
High Capacity Hydrogen Storage in Ni Decorated Carbon Nanocone: A First-Principles Study  [PDF]
S. Abdel Aal, A. S. Shalabi, K. A. Soliman
Journal of Quantum Information Science (JQIS) , 2015, DOI: 10.4236/jqis.2015.54016
Abstract: Hydrogen adsorption and storage on Ni-decorated CNC has been investigated by using DFT. A single Ni atom decorated CNC adsorbs up to six H2 with a binding energy of 0.316 eV/H2. The interaction of 3H2 with Ni-CNC is irreversible at 603 K. In contrast, the interaction of 4H2 with Ni-CNC is reversible at 456 K. Further characterizations of the two reactions are considered in terms of the projected densities of states, electrophilicity, and statistical thermodynamic stability. The free energy of the reaction between 4H2 and Ni-CNC, surface coverage and rate constants ratio meet the ultimate targets of DOE at 11.843 atm, 0.925 and 1.041 respectively. The Ni-CNC complexes can serve as high-capacity hydrogen storage materials with capacities of up to 11.323 wt.%. It is illustrated that unless the access of oxygen to the surface is restricted, its strong bond to the decorated systems will preclude any practical use for hydrogen storage.
Effect of Feeding a Combination of Zinc, Manganese and Copper Methionine Chelates of Early Lactation High Producing Dairy Cow  [PDF]
Ghada Mostafa El Ashry, Ayman Abdel Mohsen Hassan, Soliman Mohamed Soliman
Food and Nutrition Sciences (FNS) , 2012, DOI: 10.4236/fns.2012.38144
Abstract: The objective of the study was to compare the effect of feeding mixed chelated minerals (Mn, Cu and Zn) methionine on dairy cow productive performance and milk yield and its components. The trial was conducted with dairy cows across various stage of lactation. The experimental treatments include chelated minerals (15 mg Zn as Zn Met, 20 mg Mn as Mn Met, 10 mg Cu as Cu Met). Inorganic mixture contains (15 mg Zn as ZnSO4, 20 mg Mn as MnSO4, 10 mg Cu as CuSO4) in sulphate forms. The experiment was commenced in the dry period of cows, 6 weeks before calving, and after calving the first three months of lactation was taken into consideration. Milk samples were collected from each cow evening and morning for estimation of milk yield production. The inorganic metals caused a significant decline (P < 0.05) in digestibility coefficients, nutritive value, nitrogen utilization, Cell wall constituents, total VFA’s, rumen volume, microbial and nitrogen synthesis compared to the organic metals. The treated group (chelated minerals) improved the milk yield, and the milk fat percentage of animals across various stages of lactation as compared to inorganic minerals treated group of animals, and no significant differences were observed among groups concerning the entire blood constituent.
Intersection Curves of Implicit and Parametric Surfaces in R3  [PDF]
Mohamed Abdel-Latif Soliman, Nassar Hassan Abdel-All, Soad Ali Hassan, Sayed Abdel-Naeim Badr
Applied Mathematics (AM) , 2011, DOI: 10.4236/am.2011.28141
Abstract: We present algorithms for computing the differential geometry properties of Frenet apparatus {t,n,b,κ,τ} and higher-order derivatives of intersection curves of implicit and parametric surfaces in R3 for transversal and tangential intersection. This work is considered as a continuation to Ye and Maekawa [1]. We obtain a classification of the singularities on the intersection curve. Some examples are given and plotted.
Heat shock proteins development in different stages of schistocerca gregaria as response to heavy metals intoxication  [PDF]
Hesham A. Yousef, Amira Afify, Afaf Abdel Meguid, Hany M. Hassan
Natural Science (NS) , 2011, DOI: 10.4236/ns.2011.33028
Abstract: The induction of heat shock proteins in different stages of S. gergaria exposed to long and short term contamination with heavy metals, Cd and Pb in food was determined, revealing a prominent variable effect in response to the term of exposure and the type of contamination. HSP 70 was specially quantified and characterized to reveal the probability of using HSP as a biomarker for pollution.
DNA damage in hemocytes of Schistocerca gregaria (Orthoptera: Acrididae) exposed to contaminated food with cadmium and lead  [PDF]
Hesham A. Yousef, Amira Afify, Hany M. Hasan, Afaf Abdel Meguid
Natural Science (NS) , 2010, DOI: 10.4236/ns.2010.24037
Abstract: We measured in a comet assay the damage of DNA in the hemocytes of various stages of the grasshopper Schistocerca gregaria after ex-posing them to various doses of Cd and Pb in the food. The mechanisms of Cd and Pb toxicity for grasshopper are discussed. The accumula-tion of heavy metals and stage of the insect may play important roles in causing the DNA damage. S. gregaria may be considered a valuable bio-indicator for evaluation the genotoxicity of en-vironmental pollutants.
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