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Search Results: 1 - 10 of 715720 matches for " A. M. Abd Elgyoum "
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The Sensitivity of Computerized Tomography in Diagnosis of Brain Astrocytomas  [PDF]
E. Abd Elrahim, A. Elzaki, Ali Hassan, A. M. Abd Elgyoum, H. Osman
Open Journal of Radiology (OJRad) , 2014, DOI: 10.4236/ojrad.2014.44040
Abstract: Astrocytomas are tumors that arise from astrocytes—star-shaped cells that make up the “glue-like” or supportive tissue of the brain. Astrocytomas can appear in various parts of the brain and nervous system, including the cerebellum, the cerebrum, the central areas of the brain, the brainstem and the spinal cord. The main objective of this study was to detect the sensitivity of the CT scan in diagnosis of the brain astrocytoma, in patients who were confirmed as brain gliomas using computerized tomography of the brain versus brain tissue biopsy after surgery. One hundred and one patients were included in this study. Bio-data collected for these patients (age, gender), radiographic appearance, contrast enhancement and the site of the tumor, were statistically analyzed. Out of the 101 patients with brain gliomas, 52 (51.5%) were male whose ages ranged between 1 and 80 years, and 64 (63.4%) cases were diagnosed as astrocytoma by CT. This study concluded that the CT brain was sensitive in the diagnosis of brain astrocytomas.
Prospective study evaluating the value of subjective global assessment and national risk score 2002 for post-operative risk detection in living related donor liver transplant recipients  [PDF]
A. Abd Elrehim, O. Fekry, Abd Elaziz, W. Fathalah, M. Abd Elbary, T. Darwish
Open Journal of Gastroenterology (OJGas) , 2013, DOI: 10.4236/ojgas.2013.32020
Abstract: Background: Chronic liver disease may be associated with protein energy malnutrition. Those malnourished patients undergoing liver transplantation suffer great morbidities and even mortalities. Estimating the degree of malnutrition in patients with end stage liver disease is a difficult job, Subjective Global Assessment (SGA) and Nutritional Risk Score-2002 (NRS-2002) are among many tools that can give an overview for the nutritional status of the patients. Aim: To detect the efficacy and the predictive validity of SGA and NRS 2002 for post-operative risk detection for liver transplant patients. Patients & Methods: 30 recipients of end stage liver disease had undergone a nutritional assessment by SGA score & NRS-2002 score, to be compared with the parameters of outcome of post-operative liver transplantation (ALT, AST, INR, Bilirubin, time spent in ICU, hospital infective episodes & number of antibiotic courses). Results: Patients declared as malnourished by SGA and NRS-2002 had higher post operative ALT & AST value, more prolonged INR, spent more time at ICU and hospital, suffered from more infective episodes and had more antibiotic courses in a significant statistical manner. Conclusion: SGA and NRS-2002 could be useful, simple and dependable tools to be used for risk detection of post-operative morbidities after liver transplantation.
Batch Studies for Sorption of Ga(III), Cu(II), Ni(II) and Zn(II) Ions onto Synthetic Polymeric Resins  [PDF]
H. A. Hanafi, M. Abd Elsamad
Open Journal of Inorganic Chemistry (OJIC) , 2015, DOI: 10.4236/ojic.2015.52004
Abstract: Poly(acrylamide-acrylic acid-dimethyl amino ethylmethacrylate), p(AM-AA-DMAEM) and Poly(acrylamide-acrylic acid)-ethylene diamine tetracetic acid disodium, p(AM-AA)-EDTANa2 were prepared by gamma radiation-induced template polymerization technique. The prepared polymeric materials were used for the sorption of Ga(III), Cu(II), Ni(II) and Zn(II) in aqueous solution. The effect of pH, weight of resins, metal ion concentrations and contact time on the sorption of these metal ions were studied.
Deriving of the Generalized Special Relativity (GSR) by Using Mirror Clock and Lorentz Transformations  [PDF]
M. H. M. Hilo, R. Abd Elgani, R. Abd Elhai, M. D. Abd Allah, Amel A. A. Elfaki
Natural Science (NS) , 2014, DOI: 10.4236/ns.2014.617117
Abstract: Einstein relativity theory shows its high capability of promoting itself to solve the long stand physical problems. The so-called generalized special relativity (GSR) was derived later, using the beautiful Einstein relation between field and space-time curvature. In this work we re-derive (GSR) expression of time by incorporating the field effect in it, and by using mirror clock and Lorentz transformations. This expression reduces to that of (GSR) the previous conventional one, besides reducing to special relativistic expression. It also shows that the speed of light is constant inside the field and is equal to C. This means that the observed decrease of light in matter and field is attributed to the strong interaction of photons with particles and mediates which causes successive absorption and reemission processes that lead to time delay. This absorption process makes some particles appear to move faster than light within the field or medium. This new expression, unlike that of GSR, can describe time and coordinate relativistic expressions for strong as well as weak fields at constant acceleration.
Impact of the light intensity variation on the performance of solar cell constructed from (Muscovite/TiO2/Dye/Al)  [PDF]
R. Abd Elgani, M. H. M. Hilo, M. D. Abd Allah, A. Al Hassan, R. Abd Elhai
Natural Science (NS) , 2013, DOI: 10.4236/ns.2013.510131
Abstract:

In this work, the influence of the light intensity as one of the parameters that control the solar cell is studied. The effect of the other main variables, such as temperature, rotation per Minuit of the spin coating instrument, and the samples concentration, was found to be in conformity with other results, but unfortunately the intensity of light does not increase the solar cell efficiency, and fill factor, by other words it was found to play only a secondary role.

Generalized general and special relativity in the presence of the gravitation, related to the space-time curvature  [PDF]
M. H. M. Hilo, M. D. Abd Allah, Kh. M. Haroon, A. H. Abd Elrahman
Natural Science (NS) , 2012, DOI: 10.4236/ns.2012.45046
Abstract: Using the equation of motion expression in a curved space proper time is a useful method to explain the relation between the curvature of space-time and the potential of any field obtained. Taking into account the expression for the Hamiltonian density, the effect of fields, as well as the effect motion, on the mass, and, their effect on energy is found. The new expression of energy reduced to the ordinary Newton’s energy expression. It also explains the gravitational red shift.
Effect of doping concentration on the performance of solar cell constructed from (Muscovite/TiO2/Dye/Al)  [PDF]
R. Abd Elgani, M. H. M. HILO, A. Al Hassan, M. D. Abd Allah
Natural Science (NS) , 2013, DOI: 10.4236/ns.2013.51009
Abstract:

Solar cells were fabricated from (Muscovite/ TiO2/Dye/Al), the effect of temperature, concen- tration and light intensity on the electrical prop- erties of (Muscovite/TiO2/Dye/Al) was studied. The relationship between current and voltage was found to be algorism, which is in agreement with the ordinary relation for solar cells. When dye concentration was increased the conductivity, fill factor and efficiency were also increased. This result is found to be in conformity with the theoretical relations. The small energy gaps for their samples show that they are semiconductors. The maximum efficiency obtained is 33.2%.

Distribution of Different Organotin and Organolead Compounds in Sediment of Suez Gulf  [PDF]
Mohamed A. Shreadah, Tarek O. Said, Safaa A. Abd El Ghani, Abd El Moniem M. Ahmed
Journal of Environmental Protection (JEP) , 2011, DOI: 10.4236/jep.2011.25063
Abstract: Organotin and organolead compounds were determined in sediments of the Suez Gulf The concentrations of Tributyltin (TBT) ranged from 0.27 to 2.77 with an average value of 1.37 µgg-1; dry wt. However, the concentrations of dibutyltin (DBT) ranged from 0.07 to 2.27 with an average value of 0.58 µgg-1; dry wt. A significant correlation was found between TBT and DBT with r = 0.82, (p = 0.05) indicating that the occurrence of DBT is mainly related to the degradation of TBT. Generally, the high concentration of TBT was attributed to shipping activity in harbours. In addition, Diphenyltin (DPhT) concentrations ranged from not detected to 2.09 with an average of 1.10 µgg-1 dry wt. Antifouling agents, industrial discharge and the influence of sewage discharge are the main sources of pollution by DPhT compounds in Suez Gulf. On the other side, organolead (OLC) concentrations ranged from 10.88 - 440.2 with an average of 168.7 ngg-1; dry wt. A significant setting of OLC recorded in sediments of Suez Gulf was mainly attributed to cars exhaust and/or spelling and direct evaporation of fuels.
Air Cooling of Mini-Channel Heat Sink in Electronic Devices  [PDF]
Mousa M. Mohamed, Mostafa A. Abd El-Baky
Journal of Electronics Cooling and Thermal Control (JECTC) , 2013, DOI: 10.4236/jectc.2013.32007
Abstract: Heat transfer experiments were conducted to investigate the thermal performance of air cooling through mini-channel heat sink with various configurations. Two types of channels have been used, one has a rectangular cross section area of 5 × 18 mm2 and the other is triangular with dimension of 5 × 9 mm2. Four channels of each configuration have been etched on copper block of 40 mm width,30 mm height, and 200 mm length. The measurements were performed in steady state with air flow rates of 0.002 - 0.005 m3/s, heating powers of 80 - 200 W and channel base temperatures of 48°C, 51°C, 55°C and 60°C. The results showed that the heat transfer to air stream is increased with increasing both of air mass flow rate and channel base temperature. The rectangular channels have better thermal performance than trian- gular ones at the same conditions. Analytical fin approach of 1-D and 2-D model were used to predict the heat transfer rate and outlet air temperature from channels heat sink. Theoretical results have been compared with experimental data. The predicted values for outlet air temperatures using the two models agree well with a deviation less than ±10%. But for the heat transfer data, the deviation is about +30% to –60% for 1-D model, and –5% to –80% for 2-D model. The global Nusselt number of the present experimental data is empirically correlated as \"\" with accuracy of ±20% for \"\" and compared with other literature correlations.
The Biological and Economical Feasibility of Feeding Barley Green Fodder to Lactating Awassi Ewes  [PDF]
Abd Rahim M. A. Saidi, Jamal Abo Omar
Open Journal of Animal Sciences (OJAS) , 2015, DOI: 10.4236/ojas.2015.52012
Abstract: The objective of this research was to investigate the biological and economical values of hydroponic barley (HB) on lactating Awassi ewes. A total of 48 lactating ewes were used in a feeding trial in two groups. The first was fed a regular lactation TMR ration while ewes in the second treatment were fed similar ration except that regular wheat hay was totally replaced by HB for 120 days feeding trial. Results of the experiment showed that the green fodder yield in 8 days germination cycle was 7.5 kg per 1 kg barley grains of green fodder. HB had no effects on feed intake (FI), body weight changes, milk yield, and milk composition; however, HB had positive effects on ewe’s health conditions, mortalities, conception rates and abortion. In conclusion, HB can be used as feed for lactating sheep as cost of feed can be reduced by 42%.
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