Browsing by Author "Cokeliler Serdaroglu, Dilek"

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Configuration of Hardware for Medical Plasma Based Surgical Device and Features
(2018) Recber, Deniz; Kayserilioglu, Batuhan; Kocum, Ismail Cengiz; Cokeliler Serdaroglu, Dilek
This research, covers the evaluation of the performance of harware of plasma-based (gas plasma, plasma jet) surgical prototype device which will be used in microsurgery, identification of active device operating conditions with the appropriate engineering models Microsurgery is by taking advantage of the magnifying effect of the special operation microscope, very small structures that can hardly be seen with the naked eye and surgery using very thin instrument. It is necessary to emphasize, the plasma technique using on directly liver cell for the treatment is the novel study. The examples of portable commercial devices in the world have started to increase in the recent past, but they are still few. The project has three main design in general; primarily high voltage power supply, bipolar plasma probe, gas supply control unit made it. High voltage power supply made with transformator and mosfets connecting with push-pull. Bipolar plasma probe, made 2 tungsten rod which mounted on the board mechanism and used teflon wire for connection with high voltage power supply. For the gas supply control unit, used microprocessor controlled and transistor amplifier selenoid valve. Thus, it is aimed to trigger the solenoid valve and adjust the gas flow in the adjustable frequency range. In the first tests made, the formation of radiation of the high voltage circuit was observed. The integration with the tungsten probe system was completed and tried to test the relation between angle and distance and radiation. In addition, the completed parts of the gas supply control unit designed together with the solenoid valve and the microprocessor have been tested. etc.] in its style sheet. As a result, the distance parameter of radiation formation is determined by high voltage circuit tests. Radiation-angle tests were performed and later turned into a prototype with the outer design of the device.
Design and Construction of Affordable and Domestic Device for Carbon Nanoparticle Synthesis
(2018) Aykutlu, Dilara; Okursoy, Berkay; Kocum, Ismail Cengiz; Cokeliler Serdaroglu, Dilek
Nanoparticles are structures below 100 nanometer and used for molecular imaging with gene therapy, implementation of many biomedical applications such as biosensor, cancer-pathology diagnosis and treatment, targeted drug-making and therefore superior in application areas. The aim of the study is to develop a device that synthesizes carbon nanoparticles by dense medium plasma method; together with hardware, software and mechanical design. Dense medium plasma is an easy synthesis approach with low cost; However, it is necessary for the user of this device to be more comfortable to use, feasible, portable and suitable for market. Moreover there is no commercial device for synthesing carbon nanoparticles by dense medium plasma technique. This research presents details of construction of affordable device for carbon nanoparticle sythesis. Prototype is an unique domestic product and contains integrated hardware, software and mechanical probe parts. Hardware part consists of control, power unit and induction coil unit and these three units are connected to each other. The power unit ensures that the mosfets are triggered by a certain voltage from the control unit. The induction coil unit is induced by turning the low voltage to high voltage. In the mechanical part, probe design supplies discharge betweeen electodes which are fed by argon gase that converts benzene to the carbon nanoparticles. The probe reaches the resonance frequency and to make it easier to adjust the distance between the bottom and top electrode, a spindle system is used. Software operation is measuring high voltage. To make the appliance portable, moreover wheeled table production was done. As a result, signal and power card tests were made, it was observed that the high voltage circuit, the signal circuit and the induction coil cause radiation. More nanoparticle production was achieved with the controllable distance between the bottom electrode and the top electrode of probe. The efficiency of the synthesis was improved and the usage of the device was made practical. Finally prototype device that is usable for synthesis nanoparticles by dense medium technology is constructed affordablity and presented with all details.
Design of a portable and low-cost mass-sensitive sensor with the capability of measurements on various frequency quartz tuning forks
(2019) Unal, Mehmet Altay; Kocum, Ismail Cengiz; Cokeliler Serdaroglu, Dilek; 0000-0001-8645-9047
Recently, sensor and biosensor applications have become widespread and are now significant tools in the biomedical field and other areas. Since quartz tuning fork (QTF) resonance frequency depends on the mass adsorbed to its prongs, it is generally used to measure minor mass change and detect target analyte in picogram levels. This study is undertaken to design and fabricate a sensor device for the measurement of QTF transducers. When QTF sensor studies were investigated, it was found that explanations on the details of instrumentation part were limited, and in addition, there was no compact commercial products. In this study, a novel, low-cost, portable quartz tuning fork sensor device with ability to work with any kind of display is presented in detail. Moreover, the effect of the ambient temperature during the measurements was checked. Six other QTF transducer types, 32, 32.768, 40, 65.536, 75, and 100 kHz, have been studied as the other novel part of the research. As a result, a QTF sensor device was fabricated that has further advanced features when compared with its alternatives and works with a more accurate measurement method. Owing to this advancement, using biosensor/chemical sensor which consists of QTF transducers with features that can take sensitive analyte measurement in picogram level will be able to spread.