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Search Results: 1 - 10 of 14905 matches for " El-Sayed Mansour "
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High Protein Diet that Cause Weight Loss and Lower Blood Glucose Level Have a Serious Impact on the Kidney Functions of Male Diabetic Obese Albino Rats  [PDF]
Ahmed El-Sayed Nour El-Deen, Abd El-Megeed Mansour, Ahmad Taha
Food and Nutrition Sciences (FNS) , 2018, DOI: 10.4236/fns.2018.910085
Abstract: Background: High protein (HP) diets are increasingly being recommended as one of the management strategies for weight control in overweight and obese individuals. The health benefits of high protein diets are well-established, but the mechanisms of action on body systems responsible for the changes in body weight and glycaemic control are not well-clear. Objective: The present study aimed to examine the effect of HP diets on the kidney functions of diabetic obese albino rats. Material and Methods: Eighty male adult male albino rats were used in this study. The animals were divided into eight equal groups (10 rats for each). Type 2 DM and obesity were induced. At the end of the 12 weeks, samples were collected for biochemical analysis. Results: The high protein diet led to significant decrease in BW, FI, BG, TC, LDL, TG, Lactate dehydrogenase, albumin, urine pH and urine citrate; while serum insulin, HDL, urea, creatinine, total protein, urine volume and urinary excretion of Ca were significantly higher in high protein diet groups. Conclusion: A high protein intake in diabetic obese albino rats for 12 weeks led to changes in the serum and urine levels of markers of renal function which indicated abnormalities in the functions of the kidney.
Effect of Green Coffee on Cisplatin Induced Renal Apoptosis in Adult Male Albino Rats  [PDF]
Ahmed El-Sayed Nour El-Deen, Abd El-Megeed Mansour, Ahmad Taha, Ehab M. Fahmy
Food and Nutrition Sciences (FNS) , 2019, DOI: 10.4236/fns.2019.104028
Abstract: Background: Green coffee as a functional food has an antioxidant effect, which can reduce the cancer incidence, promote weight-loss and improve glucose and lipid metabolism, as well as anti-oxidant and anti-inflammatory activity. Objective: Assessing the effect of green coffee administration on experimental cisplatin induced renal apoptosis in adult male albino rats of local strain. Design: Randomized Block Design was used. Materials and Methods: Forty adult male albino rats of local strain were randomly divided into four groups of 10 animals each. G1: control negative group was received isotonic saline (0.5 ml, i.p.) for 30 consecutive days, G2: sham operated group mice were received green coffee extract in water (40 mg/kg/day) for 30 consecutive days, animals of G3 and G4 were administered cisplatin (8 mg/kg/day, i.p.) at 10th day, which is well known to produce significant nephrotoxicity in rats. Animals in G3 were received green coffee extract in water (40 mg/kg/day) and G4 was received isotonic normal saline (0.5 ml, i.p.) for 30 consecutive days. All rats were sacrificed after 30 days and blood was withdrawn for biochemical examinations of kidney function tests (blood urea nitrogen, creatinine and uric acid). Kidneys were removed for determination of renal oxidative stress markers (H2O2) biochemically and caspase-3 by Immunohistochemical examination. Results: Cisplatin administration was associated with significant higher levels of BUN, creatinine, uric acid and H2O2 as compared with normal control group. Green coffee administration in cisplatin-induced renal apoptosis groups produced significant lower levels of BUN, creatinine, uric acid and H2O2 (24.4 ± 4.14, 1.730 ± 0.2830, 5.50 ± 0.850 and 0.51 ± 0.12 respectively) as compared with cisplatin-induced renal apoptosis group not administrated green coffee (27.4 ± 6, 2.04 ± .31, 7.00 ± 1.25 and 1.1 ± 0.16 respectively). Cisplatin administration increased expression of the apoptotic protein caspase-3. In contrast, treatment with green coffee extract attenuated apoptosis. Conclusion: green coffee reduced cisplatin-induced renal apoptosis. Green coffee improved the general condition of cisplatin-induced renal apoptosis rats due to its antioxidant and anti-apoptotic effects.
Effect of Urbanization and Industrialization Processes on Outdoor Thermal Human Comfort in Egypt  [PDF]
El-Sayed ROBAA
Atmospheric and Climate Sciences (ACS) , 2011, DOI: 10.4236/acs.2011.13012
Abstract: Detailed studies on the effect of urbanization and industrialization processes on outdoor thermal human com- fort in Greater Cairo region, Egypt have been performed in this study. Four different districts in Greater Cairo region have been selected to represent rural, suburban, typical urban and industrial areas. The data of surface dry, wet bulb temperatures and wind speed for two different periods represent non-urbanized and urbanized periods have been used. Discomfort indices for the two periods have been calculated for the four districts. The study revealed that urbanization and industrialization processes have resulted in the distinctly modification of human comfortable at all districts. The feeling of quite comfortable reduced from the old non-urbanized period to the recent urbanized period at the four districts. During the recent urbanized period, the rural area has the highest total number of quite comfortable hours while both urban and industrial areas have the lowest total number of hours. The serious hot uncomfortable didn’t occur at all districts during the old non-urbanized period while during the recent urbanized period, all people had felt extreme serious hot uncomfortable only at urban and industrial areas. It could be concluded that the urbanization and industriali-zation processes cause increase of human serious hot uncomfortable feeling which in turn leads to more hin-dering for the human activities while the rural conditions leads to optimum weather comfort for further and more human activities.
Advanced Transition/Cluster Key Management Scheme for End-System Multicast Protocol  [PDF]
Ayman El-Sayed
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2012, DOI: 10.4236/ijcns.2012.55038
Abstract: The recent growth of the World Wide Web has sparked new research into using the Internet for novel types of group communication, like multiparty videoconferencing and real-time streaming. Multicast has the potential to be very useful, but it suffers from many problems like security. To achieve secure multicast communications with the dynamic aspect of group applications due to free membership joins and leaves in addition to member's mobility, key management is one of the most critical problems. So far, a lot of multicast key management schemes have been proposed and most of them are centralized, which have the problem of \"one point failure\" and that the group controller is the bottleneck of the group. In order to solve these two problems, we propose a Key Management Scheme, using cluster-based End-System Multicast (ESM). The group management is between both 1) the main controller (MRP, Main Rendezvous Point) and the second controllers (CRP, Cluster RP), and 2) the second controllers (CRPs) and its members. So, ESM simplifies the implementation of group communication and is efficient ways to deliver a secure message to a group of recipients in a network as a practical alternative to overcome the difficulty of large scale deployment of traditional IP multicast. In this paper, we analyze different key management schemes and propose a new scheme, namely Advanced Transition/Cluster Key management Scheme (ATCKS) and find it has appropriate performance in security.
Selectivity of Acrylic Acid Radiation Grafted Non-Woven Polypropylene Sheets towards Some Heavy Metals Ions  [PDF]
Dalia El-Sayed Hegazy
Open Journal of Polymer Chemistry (OJPChem) , 2012, DOI: 10.4236/ojpchem.2012.21002
Abstract: Graft polymerization has been considered as a general method for the modification of the physical and chemical properties of polymeric materials and of particular interest for synthesis of the hydrophilic membrane. In this study, hydrophilic carboxylic acid groups were introduced by radiation-induced grafting of acrylic acid (AAc) onto non-woven polypropylene fabric (NWPP). Different irradiation doses and (AAc) monomer concentrations were used to optimize grafting yield. Characterization and properties of the prepared graft copolymer were studied by employing X-ray Dif-fraction (XRD), Thermogravimetric Analysis (TGA), Scanning Electron Microscope (SEM ), Fourier Transform Infrared Spectrometry (FTIR) and differential scanning calorimeter (DSC). The prepared grafted materials were used for removing some heavy metals ions. The results showed that the non-woven PP grafted with (AAc) has good affinity toward Cu, Ni and Co.
Detection of Land-Use and Surface Temperature Change at Different Resolutions  [PDF]
El-Sayed Ewis Omran
Journal of Geographic Information System (JGIS) , 2012, DOI: 10.4236/jgis.2012.43024
Abstract: Understanding the relationship between land-use/land-cover change (LULCC) and environment is seriously important to manage arid land. However, information on how environmental factors influence the LULCC patterns at different scales in arid area is lacking. This paper investigates the application of RS/GIS for detecting LULCC and assessing its impact on surface temperature in the Ismailia Governorate, Egypt. Landsat images have been utilized to quantify the changes from 1984 to 2011. The images were pre-processed using calibration techniques and the geometric and atmos- pheric corrections were performed. Different ratios, indices, and optimized index factor were implemented to decide the best band combination. Supervised classification using Maximum Likelihood technique and spatial reclassification have been employed. Six land-use/land-cover categories (urban, vegetation, waterlogged 1 and 2, bare land, and water) were identified. The highest overall accuracy and Kappa coefficient is 93.04% and 80.65%, respectively. The integration of RS and GIS was further applied to examine the impact of land-use change on surface temperatures. The results revealed a notable land-use change in the study area. The Built-up area has rapidly increased in Ismailia during the 27 years pe- riod. The built-up area (37.65?C in 1984 and 43.876?C in 2011) and Barren land (37.34?C in 1984 and 42.801?C in 2011) exhibit the highest surface radiant temperature, while vegetated surfaces (28.73?C in 1984 and 32.96?C in 2011), water (25.94?C in 1984 and 27.32?C in 2011), waterlogged1 (34.54?C in 1984 and 35.60?C in 2011) recorded low radiant temperature respectively. Waterlogged2 is the class that shows an unexpected radiant temperature (26.38?C in 1984 and 27.75?C in 2011). The urban development between 1984 and 2011 has given rise to an average of 6.23?C in surface radiant temperature. During 27 years, the change rate of land-use types which are decreased are barren land (1.12% an- nually) and waterlogged1 and 2 (0.76 and 6.61% annually). The area of vegetation, water, and built-up are increased by 0.98%, 0.82%, and 0.61% per year, respectively.
Improving the Prediction Accuracy of Soil Mapping through Geostatistics  [PDF]
El-Sayed Ewis Omran
International Journal of Geosciences (IJG) , 2012, DOI: 10.4236/ijg.2012.33058
Abstract: This research aimed to implement and compare the accuracy of different interpolation methods using cross validation errors for interpolating the spatial pattern of soil properties. This paper investigates whether the use of kriging, instead of traditional interpolation methods, improves the accuracy of prediction of soil properties. To this end, various interpolation (kriging) techniques that rely on the spatial correlation between observations to predict attribute values at ensampled locations are studied. Geostatistics provides descriptive tools such as semivariograms to characterize the spatial pattern of continuous and categorical soil attributes. The maps obtained from Ordinary Kriging, Inverse Distance Weighting and splines show clearly that the map from Universal Kriging (UK) is better than the other three interpolation methods. Therefore, UK can be considered as an accurate method for interpolating soil (EC, pH, CaCO3) properties.
The Products of Regularly Solvable Operators with Their Spectra in Direct Sum Spaces  [PDF]
Sobhy El-Sayed Ibrahim
Advances in Pure Mathematics (APM) , 2013, DOI: 10.4236/apm.2013.34060
Abstract:

In this paper, we consider the general quasi-differential expressions \"\" each of order n with complex coefficients and their formal adjoints on the interval (a,b). It is shown in direct sum spaces \"\" of functions defined on each of the separate intervals with the cases of one and two singular end-points and when all solutions of the equation \"\" and its adjoint \"\" are in \"\" (the limit circle case) that all well-posed extensions of the minimal operator \"\" have resolvents which are HilbertSchmidt integral operators and consequently have a wholly discrete spectrum. This implies that all the regularly solvable operators have all the standard essential spectra to be empty. These results extend those of formally symmetric expression \"\" studied in [1-10] and those of general quasi-differential expressions

Attitude Control of an Axi-Symmetric Rigid Body Using Two Controls without Angular Velocity Measurements Paper  [PDF]
Tawfik El-Sayed Tawfik
World Journal of Mechanics (WJM) , 2013, DOI: 10.4236/wjm.2013.35A001
Abstract:

This paper considers the problem of controlling the rotational motion of an axi-symmetric rigid body using two independent control torques without angular velocity measurements. The control law which stabilizes asymptotically this motion is obtained only in terms of the orientation parameters. Global asymptotic stability is shown by applying LaSalle invariance principal. Numerical simulation is introduced.

Time Course of Histomorphologic Features during Chronic Burn Wound Healing  [PDF]
Yasser S. El-Sayed
Forensic Medicine and Anatomy Research (FMAR) , 2016, DOI: 10.4236/fmar.2016.41001
Abstract: In forensic pathology, it is always indispensable to determine burn wound vitality or age to accurately assess the relationship between death and any burn wounds. Subsequently, the determination of wound age is a definitive and still cutting-edge subject in forensic pathology. Therefore, deep second-degree burn injuries were induced in a group of mice. At 7, 12, 17, 21 and 28 days post-burn, burn wound specimens were histomorphologically differentiated and compared with normal intact skin using H&E stain. The study revealed that the burn wound during healing process was usually incorporated of infiltration of inflammatory cells, granulation tissue formation and epithelialization within 7 - 12 days post-burn. Then, the surface of burn wound was partially ulcerated in association with epidermal necrosis, dermal disorganization and degeneration of the sebaceous gland 17 - 21 days post-burn. Finally, the regenerated skin retained the structure of normal skin at 28th day post-burn. Our study demonstrated that the histopathological changes of burn wounds involved deep dermis, and the pathological changes occurred at distinctive time phases were almost different in comparing to regular intact skin. Such age estimation of burn wounds is important when a cadaver or a burnt body has many burns of diverse times, especially in criminal cases.
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