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ÖgeCharacterization and comparative evaluation of polysulfone and polypropylene hollow fiber membranes for blood oxygenators(Wiley, 2024)Blood oxygenators are used to saturate oxygen levels and remove carbon dioxide from the body during cardiopulmonary bypass. Although the natural lung is hydrophilic, commercially used oxygenator materials are hydrophobic. Surface hydrophobicity weakens blood compatibility, as long-term contact with the blood environment may lead to different degrees of blood activity. Polysulfone may be considered an alternative hydrophilic material in the design of oxygenators. Therefore, it may be directed toward developing hydrophilic membranes. This study aims to investigate the feasibility of achieving blood gas transfer with a polysulfone-based microporous hollow fiber membrane and compare it with the commercially available polypropylene membranes. Structural differences in the membrane morphology, surface hydrophilicity, tortuosity, mass transfer rate, and material properties under different operation conditions of temperature and flow rates are reported. The polysulfone membrane has a water contact angle of 81.3°, whereas a commercial polypropylene membrane is 94.5°. The mass transfer resistances (s/m) for the polysulfone and polypropylene membranes are calculated to be 4.8 × 104 and 1.5 × 104 at 25°C, respectively. The module made of polysulfone was placed in the cardiopulmonary bypass circuit in parallel with the commercial oxygenator, and pH, pO2, pCO2 levels, and metabolic activity were measured in blood samples.
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Öge2nd International Graduate Research Symposium: IGRS’23 e-abstract book: May 16-18, 2023, İTÜ, Istanbul, Türkiye(İTÜ Yayınevi, 2023)International Graduate Research Symposium – IGRS’23 is an interdisciplinary and multidisciplinary event organized by the Graduate School of Istanbul Technical University (ITU) for the second time. IGRS’23 has been organized as a virtual symposium. Over 400 manuscripts had been loaded to the system and got chance to be in the IGRS program. ITU, celebrating the 250th anniversary, is one of the oldest technical universities in the world and the first technical university in Türkiye, is identified with its engineering and architectural education. And now its time to identify ITU with its graduates based on high level graduate education.
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Öge3rd International Graduate Research Symposium: IGRS’24 e-abstract book: May 8-10, 2024 İTÜ, Istanbul, Türkiye(İTÜ Yayınevi, 2024)International Graduate Research Symposium – IGRS’24 is an interdisciplinary and multidisciplinary event organized by the Graduate School of Istanbul Technical University (ITU) for the third time. IGRS’24 has been organized as a hybrid symposium; with a participation of both virtual and face-to-face. Over 600 manuscripts had been loaded to the system and got chance to be in the IGRS program. ITU, celebrating the 250th anniversary, is one of the oldest technical universities in the world and the first technical university in Türkiye, is identified with its engineering and architectural education.
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ÖgeInternational Graduate Research Symposium : IGRS’22 Fulltext Proceedings Book: June 1-3, 2022 İTÜ, Istanbul, Türkiye(İTÜ Yayınevi, 2023)This symposium is an interdisciplinary and multidisciplinary event and it is the first time organized by the Graduate School of Istanbul Technical University. Despite the first symposium, over 400 manuscripts had been loaded to the system and got chance to be in the program. A new tradition has been started in ITU. As known that Istanbul Technical University, which is approaching its 250th anniversary, is one of the oldest technical universities in the world and the first technical university in Turkey, is identified with its engineering and architectural education. Organizing International Graduate Symposium has been started approximately 10 months before and it was really very hard for us to manage processes related with this event. One of the main problems is to connect and collect different disciplinaries at one symposium. However, one of the main advantages of this multidisciplinary approach is to understanding scientific approaches at different perspectives. I hope researches at different disciplinaries would understand to each other by high level scientific discussion and sharing experiences with information.
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ÖgeInternational Graduate Research Symposium : IGRS’22 E-Abstract Book : June 1-3, 2022 İTÜ, Istanbul, Türkiye(İTÜ Yayınevi, 2023)This symposium is an interdisciplinary and multidisciplinary event and it is the first time organized by the Graduate School of Istanbul Technical University. Despite the first symposium, over 400 manuscripts had been loaded to the system and got chance to be in the program. A new tradition has been started in ITU. As known that Istanbul Technical University, which is approaching its 250th anniversary, is one of the oldest technical universities in the world and the first technical university in Turkey, is identified with its engineering and architectural education. Organizing International Graduate Symposium has been started approximately 10 months before and it was really very hard for us to manage processes related with this event. One of the main problems is to connect and collect different disciplinaries at one symposium. However, one of the main advantages of this multidisciplinary approach is to understanding scientific approaches at different perspectives. I hope researches at different disciplinaries would understand to each other by high level scientific discussion and sharing experiences with information.