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Mesenchymal stem cells are more effective than captopril in reverting cisplatin-induced nephropathy

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BIOCelL 2019年第2期43卷 73-79页

作者： ENTSAR A.SAAD reda S.el-DEMERDASH EMAN M.abd EI-FATTAH Chemistry Department Faculty of ScienceDamietta UniversityDamiettaEgypt Urology&Nephrology Center Faculty of MedicineMansoura UniversityEgypt

Cisplatin is a powerful anticancer drug but its nephrotoxic effects limit its clinical *** aimed to evaluate the effect of mesenchymal stem cells(MSCs)injection or of captopril to counteract the cisplatin-induction of *** isolation,preparation and tracking,transforming growth factor-β(TGF-β)and interleukin-10(IL-10)expressions,kidney function tests,oxidative stress state,and histological examinations were ***-induced nephropathy was indicated biochemically and confirmed *** treatment showed normal kidney architecture and significantly decreased oxidative stress and TGF-β while increased IL-10 and improved kidney function *** treated with cisplatin+captopril showed noticeable kidney histopathological *** positive impact of MSCs in amelioration of cisplatin-induced nephropathy via their ability to motivate functional and structural renal repair is evidenced.

关键词： Histopathology IL-10 Minerals Nephropathy Oxidative stress PCR Repair TGF-β

Uncertainty contribution at NIS phototherapy irradiance facility

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Journal of Measurement Science and Instrumentation 2015年第4期6卷 332-335页

作者： Alaa-eldin A abd-elmageed Sameh M reda Photometry and Radiometry division National Institute for Standards(NIS)

Phototherapy lamps are the most effective and safest in the treatment of several medical treatments such as bilirubin. They transfer radiant energy expressed by irradiance unit in W/m2 into the skin specifically to achieve a therapeutic reduction in the bilirubin concentration in the blood. National Institute for Standards （NIS） in Egypt builds up a radiometric method to en- sure the competence of phototherapy sources （luminaire） to the standard international and national requirements. Hence, NIS provides traceability to customer through unbroken chain of phototherapy radiometer calibrated as irradiance response in W/m2. Uncertainty model including all parameters accompanied with the measurements is studied.

关键词： irradiance jaundice treatment phototherapy luminaire uncertainty

A Performance-Driven Approach for Restructuring Distributed Object-Oriented Software

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Journal of Software Engineering and Applications 2009年第2期2卷 127-135页

作者： Amal abd el-Raouf Tahany Fergany reda Ammar Safwat Hamad Computer Science Department Southern CT State University Computer Science Department University of New Haven Computer Science and Engineering Department University of Connecticut

Object oriented techniques make applications substantially easier to build by providing a high-level platform for appli-cation development. There have been a large number of projects based on the Distributed Object Oriented approach for solving complex problems in various scientific fields. One important aspect of Distributed Object Oriented systems is the efficient distribution of software classes among different processors. The initial design of the Distributed Object Oriented application does not necessarily have the best class distribution and may require to be restructured. In this paper, we propose a methodology for efficiently restructuring the Distributed Object Oriented software systems to get better performance. We use Distributed Object-Oriented performance (DOOP) model as guidance for our restructuring methodology. The proposed methodology consists of two phases. The first phase introduces a recursive graph clustering technique to partition the OO system into subsystems with low coupling. The second phase is concerned with mapping the generated partitions to the set of available machines in the target distributed architecture.

关键词： Performance Modeling Distributed Object Oriented Restructuring Methodology

Influence of Various Hydrocolloids on Suspension Stability of Chia Seeds (Salvia hispanica L.) in Mango Beverage and Mango Flavored Beverage

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Food and Nutrition Sciences 2023年第2期14卷 101-118页

作者： reda A. Aamer Ibrahim A. Attia E. S. abd el-Wahab Hort. Crop Technology Research Department Food Technology Research Institute Agriculture Research Centre Giza Egypt Edfina Company for Preserved Food Alexandria Egypt

With the developing of juices and beverages industry, the processors need to bring new nutritional fortified products to capture the market as per the demand of the consumer who needs healthier product. Thus, this study aimed to the production of mango beverage and mango flavored beverage fortified with chia seeds;evaluate the chemical properties of chia seeds and study the effect of adding carboxymethyl cellulose, xanthan gum and low acyl gellan gum at the concentrations of 0.05% and 0.1% on the stability of suspension chia seeds in beverage during storage at ambient temperature for six months. Viscosity, color, zeta potential, suspension of seeds and organoleptic properties were evaluated. Results showed that chia seeds were rich in protein, omega-3 fatty acids and dietary fiber. The addition of 0.05% gellan gum led to improved appearance attributes and the highest stability of suspension of chia seeds for six months, and was the sample which scored highest for overall acceptability compared to the other samples of beverages. Results indicated that using chia seeds with the addition of 0.05% low acyl gellan gum led to the production of fortified mango beverage and mango flavored beverage with high stability for six months.

关键词： Mango Beverage Mango Flavored Beverage Chia Seeds Hydrocolloids Suspension Stability

Improvement of Asphalt Properties Using Polymethyl Methacrylate

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Open Journal of Organic Polymer Materials 2014年第2期4卷 43-54页

作者： reda A. Haggam Ismail M. Ibrahim Mohamed el-Shafie abdelatif abd el Latief M. abd elrhman Sanaa A. el-Kholy Department of Chemistry Faculty of Science Zagazig University Zagazig Egypt Egyptian Petroleum Research Institute (EPRI) Nasr City Cairo Egypt

Increasing traffic loading and volumes on roads have led to the use of polymer modified binders to improve the performance of bitumen in terms of strength, durability, and resistance to rutting. This research studies the effect of adding poly methyl methacrylate (PMMA) with different molecular weights on asphalt properties. PMMA polymer was prepared via solution polymerization of MMA using dibenzoyl peroxide (DBPO) as initiator. By controlling the time of reaction, two different molecular weights were obtained: PMMA1 and PMMA2 with Mw 21.000 and 30.000, respectively. The morphological studies of polymer modified binder were discussed. Physical properties of PMMA modified asphalt including penetration value, softening point, and kinematic viscosity at 135°C and 150°C were examined. The aging properties of polymer modified asphalts were examined using thin film oven test (TFOT). A hot storage stability test was carried out for polymer modified binder. Indirect tensile strength (ITS) test and durability performance of modified asphalts were evaluated using Marshall Test. Resilient modulus (RM) test was evaluated using Universal Testing Machine. Results showed that the inclusion of PMMA polymer in asphalt binder has significantly improved its properties. The achieved improvement was found to be dependent on polymer molecular weight. Moreover, the results explained that the compatibility between PMMA and asphalt binder is improved upon further aging especially with low molecular weight polymer (PMMA).

关键词： Asphalt Binder Rutting PMMA TFOT Ageing

Edge Detection with a Preprocessing Approach

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Journal of Signal and Information Processing 2014年第4期5卷 123-134页

作者： Mohamed Abo-Zahhad reda Ragab Gharieb Sabah M. Ahmed Ahmed abd el-Baset Donkol Department of electrical Engineering Communication and electronics Assuit University Assiut Egypt Department of electrical Engineering and Computer Sciences Nahda University Beni-Suef Egypt

Edge detection is the process of determining where boundaries of objects fall within an image. So far, several standard operators-based methods have been widely used for edge detection. However, due to inherent quality of images, these methods prove ineffective if they are applied without any preprocessing. In this paper, an image preprocessing approach has been adopted in order to get certain parameters that are useful to perform better edge detection with the standard operators-based edge detection methods. The proposed preprocessing approach involves computation of the histogram, finding out the total number of peaks and suppressing irrelevant peaks. From the intensity values corresponding to relevant peaks, threshold values are obtained. From these threshold values, optimal multilevel thresholds are calculated using the Otsu method, then multilevel image segmentation is carried out. Finally, a standard edge detection method can be applied to the resultant segmented image. Simulation results are presented to show that our preprocessed approach when used with a standard edge detection method enhances its performance. It has been also shown that applying wavelet edge detection method to the segmented images, generated through our preprocessing approach, yields the superior performance among other standard edge detection methods.

关键词： Discrete Wavelet Transform Image Edge Detection Robert Prewitt Sobel Canny Techniques

Integrating of Remote Sensing and Airborne Magnetic Data to Outline the Geologic Structural Lineaments That Controlled Mineralization Deposits for the Area around Gabal el-Niteishat, Central Eastern Desert, Egypt

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Geomaterials 2021年第1期11卷 1-21页

作者： reda A. Y. el-Qassas Salem B. Ahmed Hussein F. abd-elSalam Atef M. Abu-Donia Nuclear Materials Authority Maadi Cairo Egypt

The Gabal (G.) el-Niteishat area lies in the Central Eastern Desert of Egypt which is known for various mineral resources and geological structures. Umm Gheig, Umm Naggat, Umm Shaddad, Wadi (W.) Zeidun and Sigdit represent some important regions that contain mineral deposits in the study area. Various filters such as first vertical derivative (FVD), horizontal gradient magnitude (HGM), tilt derivative (TDR) and near-surface were applied to the airborne magnetic data for the study area to deduce the structural lineaments and magnetic source edges which were controlled by the presence of mineral deposits. Processed Landsat ETM+ images are used for delineating the rock unit boundaries that are exposed in the study area such as serpentinite, metagabbro, metavolcanics and metasediments. Also, band ratios, principal component analysis (PCA) and false-color composite image (Crosta alteration image) were applied to get specific results about the alteration zones. The structural lineaments analysis illustrated that the common trends that affected the study area were NW-SE, NE-SW, E-W and N-S. Integration of remote sensing and airborne magnetic data exhibited the relation between mineralization and structural lineaments.

关键词： Remote Sensing Airborne Magnetic Mineral Exploration Umm Naggat-Umm Gheig Central Eastern Desert of Egypt

Convergence of Discrete Adomian Method for Solving a Class of Nonlinear Fredholm Integral Equations

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Applied Mathematics 2013年第1期4卷 217-222页

作者： Ibrahim Lotfy Hassan Alkalla reda abdo abd-elmonem Ayman Mohamed Ali Ahmed Gomaa Mathematics and Engineering Physics Department Faculty of Engineering Mansoura University Mansoura Egypt

In recent papers the solution of nonlinear Fredholm integral equations was discussed using Adomian decomposition method (ADM). For case in which the integrals are analytically impossible, ADM can not be applied. In this paper a discretized version of the ADM is introduced and the proposed version will be called discrete Adomian decomposition method (DADM). An accelerated formula of Adomian polynomials is used in calculations. Based on this formula, a new convergence approach of ADM is introduced. Convergence approach is reliable enough to obtain an explicit formula for the maximum absolute truncated error of the Adomian’s series solution. Also, we prove that the solution of nonlinear Fredholm integral equation by DADM converges to ADM solution. Finally, some numerical examples were introduced.

关键词： Nonlinear Fredholm Integral Equations Contraction Mapping Adomian Decomposition Method Quadratures Techniques

Huffman Image Compression Incorporating DPCM and DWT

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Journal of Signal and Information Processing 2015年第2期6卷 123-135页

作者： Mohamed Abo-Zahhad reda Ragab Gharieb Sabah M. Ahmed Mahmoud Khaled abd-ellah Department of electrical and electronics Engineering Faculty of Engineering Assiut University Assiut Egypt Department of electronics and Communication Engineering Madina Higher Institute for Engineering and Technology Giza Egypt

This paper presents a medical image compression approach. In this approach, first the image is preprocessed by Differential Pulse Code Modulator (DPCM), second, the output of the DPCM is wavelet transformed, and finally the Huffman encoding is applied to the resulting coefficients. Therefore, this approach provides theoretically threefold compression. Simulation results are presented to compare the performance of the proposed (DPCM-DWT-Huffman) approach with the performances of the Huffman incorporating DPCM (DPCM-Huffman), the DWT-Huffman and the Huffman encoding alone. Several quantitative indexes are computed to measure the performance of the four algorisms. The results show that the DPCM-DWT-Huffman, the DWT-Huffman, the DPCM-Huffman and the Huffman algorisms provide compression ratio (CR) of 6.4837, 4.32, 2.2751 and 1.235, respectively. The results also confirm that while the proposed DPCM-DWT-Huffman approach enhances the CR, it does not deteriorate other performance quantitative measures in comparison with the DWT-Huffman, the DPCM-Huffman and the Huffman algorisms.

关键词： Medical Image Compression Brain Image Compression CT DPCM DWT CR