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Altagamoa Al Khames, Main centre of town, end of 90th Street
New Cairo
Egypt
Faculty of Engineering & Technology
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Mohamed Tarek Ibrahim Mohamed Ali Elwakad

Basic information

Name : Mohamed Tarek Ibrahim Mohamed Ali Elwakad
Title: vice Dean

Education

Certificate Major University Year
PhD Measurments, Computer modeling, Biomaterials, Biomeachanics, Stress analysis Rensselare polytechnic Institute - Troy,New York,USA 1988
Masters Measurments, Medical Engineering George Washington University -Washington , D.C, USA 1981
Bachelor Mechanical Engineering Faculty of Engineering - Helwan Univrsity 1975

Researches /Publications

Optimization of micro-electrodes for DNA fragments labelled to microbeads manipulation and characterization - 01/0

Mohamed Tarek Ibrahim Mohamed Ali Elwakad

R Abdelbaset, YH Ghallab, Y Ismail

01/03/2020

Deoxyribonucleic acid (DNA) is the inborn material in humans and almost all other organisms. The movement of neutral polarizable particles from the site of the lowest strength of the electric field to the site of the most strength is known as Dielectrophoresis (DEP). DEP Distinguished from their counterparts of other techniques in manipulation and identification of biological cells and DNA. Many applications of natural and artificial DNA forms depend on the studies dedicated to the characterization of DNA. It is able to differentiate between different types of cells by observing the response of it towards a non-uniform electric field. In this study, a DEP based platform is proposed for manipulation and identification of the DNA fragments that are labeled on specific microbead. However, this platform includes a set of electrodes that allows simultaneous manipulation, trapping and controlling. Different designs of DEP-based microelectrode in micro size are simulated using COMSOL Multiphysics 5.4. This comparison is studied in order to get the optimized design for trapping and identification of DNA fragments that are labeled on specific microbeads.

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Micro-electrodes based on CMOS Technology for Characterization of Biological Cells - 01/1

Mohamed Tarek Ibrahim Mohamed Ali Elwakad

R Abdelbaset, YH Ghallab, H Abdelhamid, Y Ismail

01/12/2019

The electro-rotation configuration is one of the most important characteristics that is achieved through the Dielectrophoresis (DEP) phenomena. Furthermore, it is a significant property to distinguish between different biological cells. At a given frequency, the rotation speed and rotation direction of the biological cells are different from one cell to another based on the biological characteristics. There are many proposed designs for implementing the electro-rotations. In this paper, a comparison between these different designs are studied and simulated to propose the efficient technique that can be applied to obtain a sensitive and an accurate biological cell electro-rotation. This comparison is studied through introducing 3D simulation results using finite element method (FEM) technique. This study used the following parameters to differentiate between the techniques: the electro-rotation direction and the generated electric filed density and distribution around the electrodes, in addition to the generated DEP force on particles.

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Planar Micro-electrodes versus Cone Plate for Biological Cell Trapping and Characterization - 01/1

Mohamed Tarek Ibrahim Mohamed Ali Elwakad

R Abdelbaset, YH Ghallab, H Abdelhamid, Y Ismail

01/12/2019

The trapping and the levitation of micro scale particles has been of interest to many scientists for many years. Therefore, more than one design based on Dielectrophoresis (DEP) phenomena has been extracted for this function. The most important of these designs are as follows: the cone plate design, the concentric rings planar design, and the quadrupole planar design. In this study, a comparison between the three designs are presented using the Finite element method (FEM) in order to achieve an efficient technique for cell's trapping and levitation. This comparison based on studying the direction, distribution, the density, and the strength of the electric field, in addition to the generated DEP force on particles. COMSOL MULTIPHYSICS is proposed for introducing the simulation for the three proposed designs.

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A novel microfluidic system using a reservoir and flow control system for single-cell release, migration, separation, and characterization - 01/1

Mohamed Tarek Ibrahim Mohamed Ali Elwakad

R Abdelbaset, YH Ghallab, Y Ismail

01/12/2019

The microfluidic chambers have become the focus of many scientists and researchers because it ensures efficient control for many functions such as cell migration and separation. In addition, the microfluidic is interested in studying the behavior of fluids within microchannels. It is also interested in the technology of the manufacturing of these micro-channels. Single cell migration and separation are the key step in several applications such as lab-on-chip (measurement the electrical properties (i.e. Impedance, and capacitance) of a single-cell), biochemistry, and cell biology. In this study, a novel technique for single-cell migration and separation using a reservoir, flow control and dielectrophoresis (DEP) is purposed. Also, sensors for the capacitance measuring is implemented for cell characterization applications. The design of the proposed microfluidic chamber is simulated and tested using COMSOL Multiphysics 5.4. The results prove the ability of the proposed system for single-cell migration and separation using a reservoir and flow control system at a lower flow rate than previous work through a single sample.

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