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    Reducing the Size of the Reactor for Production of Fullerene-containing Soot and Study on the Efficiency of Alumina and Silica Gel as Stationary Phase for Separation of C60 and C70

    , M.Sc. Thesis Sharif University of Technology Kadivar Salekoyeh, Mohammad (Author) ; Ghanbari, Bahram (Supervisor) ; Gol Nabi, Hossein (Supervisor)
    Abstract
    In this study, with respect to previous projects, we focused on size reduction of hollow and endohedral fullerenes research reactors. For this reason, we set up two reactors having 1/2 and 3 liters volumes and then such parameters as pressure, reactor temperature, arc duration time, arc time interval and the working electrical current through the electrodes circuit, in both reactors were optimized. The reactors, 3- and 1/2-liter reactors were of types of horizontal and vertical, respectively. In this project spatial angle between two electrodes were also found as effective variable on fullerenes yield in the 3-liters arc reactor for the first time. We found that upon correction of the... 

    Puzzle of Jobless Growth and Growthless Employment: Evidences from Iranian Labor Market

    , M.Sc. Thesis Sharif University of Technology Hosseini, Kiarash (Author) ; Nili, Masoud (Supervisor) ; Joshaghani, Hossein (Supervisor)
    Abstract
    From 1384 to 1395, the labor market in Iran has experienced a mysterious behavior in total number of employment, which we call it puzzle of jobless growth and growthless employment. By studying only the net changes in total number of employment, some important information neglected in explaining this phenomenon. To this end, it is common in labor economics to use dynamic labor market indicators such as job flows and labor flows. In this research, we first calculate labor flows from 1384 to 1395 and job flows from 1382 to 1392 by economic sector, firm size, job classification, occupational insurance coverage, gender and job type. Then the following question will be answered: Is the... 

    Simulation, Evaluation and Fabrication of a Two-step Microfluidic System to Separate Circulating Tumor Cells

    , M.Sc. Thesis Sharif University of Technology Mir Mohammad Sadeghi, Fatemeh Sadat (Author) ; Vosoughi, Manouchehr (Supervisor) ; Alamzadeh, Iran (Supervisor)
    Abstract
    Cancer is an abnormal growth of cells which is one of the major cause of worldwide’s mortality. Circulating Tumor Cells (CTCs) are rare cancer cells released from the primary or metastatic tumors and transported though the peripheral circulatory system and spreads in body and seize healthy organs. Early detection of CTCs can help in overtaking the cancer, hence isolation of CTCs is an essential step for many therapeutics. In spite of its clinical potential, the isolation and detection of CTCs has been a challenging task due to its rare presence amongst other blood cells (as low as 1–10 CTCs per billions of blood cells), similarity to white blood cell in size and also variability in terms of... 

    Design, Simulation, and Fabrication of DEP-Based Microfluidic Chip for Bioparticles Separation

    , M.Sc. Thesis Sharif University of Technology Vamegh, Reza (Author) ; Fardmanesh, Mehdi (Supervisor)
    Abstract
    Microfluidics, employing fluids in structures with micrometer dimensions, is an emerging technology that has brought great opportunities to develop various devices including lab-on-a-chip systems. Lab-on-a-chip systems have the advantages of integrating several stages of different analytical methods, application in diverse fields, consumption of small volumes of samples, and portability. One of the crucial applications of lab-on-a-chip devices is sorting cells and biological particles, done by different methods. In separator devices, high separation efficiency and repeatability are critical. When a neutral particle is polarized in a non-uniform electric field, the dielectrophoresis force... 

    Design, Simulation and Construction of a Microfluidic Device for the Purpose of Target Cells Separation and DNA Extraction

    , M.Sc. Thesis Sharif University of Technology Amani, Ali (Author) ; Shamloo, Amir (Supervisor) ; Nouri Borujerdi, Ali (Supervisor)
    Abstract
    Today, microfluidic experiments have found wide applications in medical sciences, engineering, and chemistry. Because of their small size, microfluidic devices help us to be able to use very little amount of sample for the experiments and also easily control and observe the under-experiment fluid. One of the most important applications of these devices is the separation of cancer cells in blood for counting their number and DNA genetic studies. In the current project we have tried to do the separation of cancer cells from other cells by designing an inertia microchannel. For this purpose, in the first step a geometry for the channel is designed with analyzing the induced forces on the cells.... 

    Design, Simulation and Fabrication of Integrated Centrifugal Microfluidic Platform for Separation and Lysis of Circulating Tumor Cells

    , M.Sc. Thesis Sharif University of Technology Momeni, Maede (Author) ; Shamloo, Amir (Supervisor) ; Firoozbakhsh, Keykhosrow (Supervisor)
    Abstract
    Cancer diagnosis area has recently been in the limelight of the medical research and there exist an unremitting focus on the devices & technologies which enable cancer detection in its victims. Lately a genius diagnostic method based on isolation and entrapment of circulating tumor cells has been developed which pave the path for cancer identification. These circulating cells which are detached from the primary tumor are carried out through body by means of circulation system. They play key role in phenomenon called metastasis. Separating these rare cells from multifarious background blood cells, assessing their quantity can supply valuable information on the stage of disease as well as its... 

    Design and Simulation of a Passive Microfluidic Device for Particle Separation

    , M.Sc. Thesis Sharif University of Technology Vatankhah, Parham (Author) ; Shamloo, Amir (Supervisor)
    Abstract
    Nowadays, separation and filtration of particles has many industrial applications in biology and medicine. In this thesis, passive microfluidics are designed and simulated which are able to separate and filter particles. Although particles aer generally expected to follow laminar flow streamlines in the absence of external forces, inertial forxes van cause particles to migrate across mictochannels in an accurate and predictable manner. The effect of these forces is invedtigated, and by using previous research, a model is developed to predict these forces. First design is a microchannel with Archimedean spiral which utilizes both inertial forces and Dean flow to separate particles in the... 

    Design and Numerical Simulation of a Micro-chip for Separating CTCs from Peripheral Blood

    , M.Sc. Thesis Sharif University of Technology Niknam, Hamid Reza (Author) ; Saeedi, Mohammad Saeed (Supervisor)
    Abstract
    According to studies, cancer is the second leading cause of death in the world and millions of people die from this disease every year. Early diagnosis is one of the most important factors in controlling and treating the disease. The ability of circulating tumor cells to diagnose and monitor the disease has led many researchers to focus on studying and researching these cells in recent years. However, due to the fact that the concentration of this type of cells in the blood is very low, their isolation is associated with challenges. Various methods isolate CTCs based on physical, biological and other differences in characteristics. In this study, we investigate performance of a microfluidic... 

    Design and Fabrication of a Microfluidic System Based on Dielectrophoresis for Enrichment and Separation of Bioparticles

    , M.Sc. Thesis Sharif University of Technology Rahmani, Ali (Author) ; Mohammadi, Ali Asghar (Supervisor)
    Abstract
    The main purposes of this project are simulation, design, and fabrication of a microfluidic system based on dielectrophoresis (DEP) exploiting AC voltages for separation of microparticles. Generally, this project can be divided into two parts. First, the engineering section including design and fabrication of microchip, and second biological samples preparation for investigating the system performance. The main advantages of proposed system are eliminating joule heating, a significant problem in insulating based dielectrophoresis systems, overcoming problems related to metal contamination in biological samples, the main problem of conventional dielectrophoresis platforms, and removing... 

    Design & Manufacture of IGF/DGF Plant in Semi Industrial Scale for Wastewater Separation

    , M.Sc. Thesis Sharif University of Technology Hemmati, Amir Hossein (Author) ; Ghotbi, Siroos (Supervisor)
    Abstract
    The increasing demand for energy forced to production of oil as one of the main sources of energy. Along with the increase in oil production, the proportion of water produced with oil is increasing relative to the oil produced. On the other hand, environmental restrictions for the discharge of industrial effluents into the environment are becoming more and more stringent every day. Before discharging the effluent into the environment, petroleum must be removed. The complexity of these issues demonstrates the need to develop new technologies and improve the efficiency of existing technologies. Gas flotation are among the technologies adopted in the field that have been used throughout the... 

    Design and Fabrication of Water and Oil Separation Membranes Using Nano Technology and Wettability Properties of Surfaces

    , M.Sc. Thesis Sharif University of Technology Heydari, Mohammad Reza (Author) ; Moosavi, Ali (Supervisor)
    Abstract
    Due to population growth, the demand for water supply has increased. This need has drawn attention to the use of consumed and treatable water resources. Organic pollutants are a key source of water pollution. On the other hand, petrochemical oil pollution and frequent oil accidents during oil production or maritime transport have become one of the environmental problems.There are different methods for water and oil separation and water purification that in the present project, selective separation can be achieved by using hydrophobic materials and surface roughness and creating surfaces with two properties: superhydrophobic and ultra-oil friendly. This method is also very effective, cheap... 

    Fabrication of DEP-inertial Microfluidic Device for Focusing and Separation of Particles/Cells

    , M.Sc. Thesis Sharif University of Technology Rezaei, Mohammad Reza (Author) ; Mohammadi, Ali Asghar (Supervisor)
    Abstract
    Separation of particles and cells is one of the most important and practical methods in fields such as biomedicine, medicine and industry. In microfluidics There are various methods for particles and cells separation According to the source of them, they can be categorised as active and passive techniques. Active techniques rely on an external force field. The most important advantage of this method is controlling the force on the particles during the experiment. However, the flow speed is always limited because particles must be exposed to the outer force field for sufficient duration to achieve effective functionality. passive techniques depend entirely on the channel geometry or intrinsic... 

    Design and Fabrication of a Microfluidic Chip for Live and Dead Cell Separation

    , M.Sc. Thesis Sharif University of Technology Tajik, Parham (Author) ; Firouzbakhsh, Keykhosrow (Supervisor) ; Saeedi, Mohammad Saeed (Supervisor)
    Abstract
    The recent breakthroughs in the lab-on-a-chip technology will not be directly used as clinical devices unless the specific applications are carefully tested and certified. As there is a growing trend towards microfluidic devices for biomedical research, an active microfluidic device was developed. Common microfabrication methods were used to develop a microchip to separate and concentrate live and dead cells based on the dielectrophoresis phenomenon. Unique capabilities of the dielectrophoresis phenomenon make it a powerful tool for micro particle manipulation in micro scale. In this research, geometry for the mentioned purpose is designed and optimized. Three-dimensional microelectrodes are... 

    Simulation of Clogging in Porous Media by Pore Network Model

    , M.Sc. Thesis Sharif University of Technology Razavy, Sina (Author) ; Jamshidi, Saeed (Supervisor) ; Raoof, Amir (Co-Supervisor)
    Abstract
    Clogging of the pores of the porous medium occurs in different processes such as geothermal injection pumps, hydrocarbon wells, and underground water extraction wells. We need a model that can simulate these blockages in order to predict how fundamental variables of the porous medium change under different flow regimes and different particle sizes in the fluid (for example, the relationship between porosity and permeability changes). The aim is to simulate clogging in a porous medium using a pore network model. Simulations should model pore clogging and show how the permeability of the sample changes due to pore clogging. In the pore network, there are often thousands (or millions) of pores... 

    Simulation of Droplet Sorting in Microfluidic Systems

    , M.Sc. Thesis Sharif University of Technology Fattahi, Hamid Reza (Author) ; Mousavi, Ali (Supervisor) ; Asghari, Mohsen (Supervisor)
    Abstract
    A new microfluidic device is introduced for sorting the particles based on the hydrodynamic resistance induced in a microchannel which is not needed for additional detection or sorting modules. Hydrodynamic resistance affects physical properties, such as size and deformability of the particle. This device could apply application in cell sorting for remedies, diagnostics, and industrial applications. The device design is performed using an equivalent resistance model, and also numerical simulations are performed. For validation of the results, they are compared with experimental results. Moreover, we will discuss threshold particle size and will introduce a way to approximate it to ... 

    Separation of Plasma from Blood Using a Dielectrophoresis-Assisted Microfluidic Device

    , M.Sc. Thesis Sharif University of Technology Shams, Mehran (Author) ; Mohammadi, Ali Asghar (Supervisor) ; Soltanieh, Mohammad (Supervisor)
    Abstract
    % of human blood makes up of plasma, that this plasma is a rich source of proteins that can be used as biomarkers for a variety of clinical diseases and laboratory research, therefore, it is necessary that the plasma be separate by a high purity percentage. Using a centrifuge It is a common method used to separate plasma from blood, but because it requires large equipment and a large volume of blood, as well as stress caused by centrifugal force, increases the probability of damage to the biomarkers, so it has been tried today that Use methods that are easy to transport and require a small amount of blood. The idea of using the microfluidic device has been put forward for the purpose of... 

    Separation and Preconcentration of Gold and Silver Nanoparticles Using Cloud Point Extraction

    , M.Sc. Thesis Sharif University of Technology Zare-moghadam, Mousa (Author) ; Hormozi-Nezhad, M.R (Supervisor)
    Abstract
    Separation and identification of metal nanoparticles in surface water samples such as river water is very important. Nanoparticles specially metal nanoparticles have small dimensions can easily pass through from the body's outer immune system and disrupt biological function. Most of the nanoparticles have active surface so environmental contaminants can be absorbed on their surface and then can penerated in the body, and they may cause disease. Therefore determination of nanoparticles type and concentrations and their separation from the surrounding environment, especially surface waters is important. Separation and preconcentration of metal nanoparticles was done by using cloud point... 

    Separation and Microfluidic Analysis of one Cancer Biomarker (Exosome) by Means of Microfluidic Chip Microfluidc Analysis Exosome Toward Liquid Biopsy for Cancer Tumor Cell

    , M.Sc. Thesis Sharif University of Technology Madani, Mohammad (Author) ; Saidi, Mohammad Said (Supervisor) ; Firouzabadi, Bahar (Co-Supervisor)
    Abstract
    The recent breakthroughs in the lab-on-a-chip technology will not be directly used as clinical devices unless the specific applications are carefully tested and certified. As there is a growing trend towards microfluidic devices for biomedical research, an active microfluidic device was developed. Common microfabrication methods were used to develop a microchip to separate and concentrate exosome and particular cell based on the dielectrophoresis phenomenon. Unique capabilities of the dielectrophoresis phenomenon make it a powerful tool for micro particle manipulation in micro scale. In this research, geometry for the mentioned purpose is designed and optimized. Three-dimensional... 

    Cell Separation via Nano-porous Molecularly Imprinted Polymer

    , M.Sc. Thesis Sharif University of Technology Rahnema Falavarjani, Eiman (Author) ; Abdekhodaie, Mohammad Jafar (Supervisor) ; Nematollah Zade, Ali (Co-Advisor)
    Abstract
    Molecularly imprinted polymers (MIPs) with synthetic recognition sites are capable of detecting and separating chemical species in complex environments. These characteristics are of increasing interest for bioanalytical applications. The chief advantages of MIPs are mechanical and chemical stability, low cost, and ease of preparation. Recently, imprinting technology has been used for fabrication polymer thin films with recognition sites of proteins, plant viruses, and yeasts. Also few investigations applied lithography for synthesis of cell imprinted polymers targeting cell detection and observation of cell morphology.
    For the first time, we demonstrate surface imprinting for the... 

    CTC Cluster Separation on Microfluidics Chip

    , M.Sc. Thesis Sharif University of Technology Rostami, Peyman (Author) ; Firouzabadi, Bahar (Supervisor) ; Saidi, Mohammad Said (Supervisor)
    Abstract
    According to statistics in 2012, around 14 million people worldwide have cancer, and 8 million have died that year, according to estimates, this number will increase to 21 millions new cancer case and 13 million mortality in 2030. Despite years of research on cancer, many questions about the mechanism of the spread of cancer in the body remain unanswered so far. The proposed models identify that the cells isolated from the primary tumor and transmit them to the circulatory system in the form of circulating tumor cells (CTCs) or in the form of clusters as responsible for the incidence of cancer. This process is called metastasis. Recent studies have reported the high potential of metastasis...