Master Degree / Yüksek Lisans Tezleri
Permanent URI for this collectionhttps://hdl.handle.net/11147/3008
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Master Thesis Development of hydrogels via photocrosslinking of wool proteins(01. Izmir Institute of Technology, 2024) Yakar, İrem; Top, AybenYüksek su emme kapasitesine ve doku benzeri özelliklere sahip hidrojeller, yara iyileşmesi için ideal nemli bir ortam sağlamaktadır. Bu çalışma, yara iyileştirme uygulamaları için doğal bir protein olan oksitlenmiş keratin (KTS) ve sentetik bir polimer olan Pluronic F127 bazlı biyoaktif gallik asit (GA) ve karbon noktaları (CD'ler) içeren hibrit hidrojellerin sentezlenmesine odaklanmıştır. KTS ve F127'nin metakrilatlanmış formları (KTSMA ve F127MA) metakrilik anhidrit kullanılarak sentezlenmiş ve fonksiyonelleştirilmiş formlar spektr oskopik yöntemler kullanılarak doğrulanmıştır. KTSMA ve F127MA, kendi kendini destekleyen hidrojeller oluşturmak için Irgacure 2959 fotobaşlatıcı kullanılarak UV ışığı altında çapraz bağlanmıştır. Üç hidrojel hazırlanmıştır: K4 (%4 KTSMA), K7.5 (%7.5 KTSMA) ve KP7.5 (%4 KTSMA + %3.5 F127MA) ve bunların viskoelastik, şişme, bozunma ve morfolojik özellikleri belirlenmiştir. Hücre proliferasyon testleri, tüm hidrojellerin hücre büyümesini desteklediğini göstermiştir. KP7.5 hidrojelleri kararlı mekanik ve bozunma özellikleri sergilemiştir. Karbon noktalar kurkumin ve l-lizin kullanılarak sentezlenmiş ve S. aureus'a karşı ılımlı antibakteriyel özelliklere sahip olduğu gösterilmiştir. Karbon noktaların yapısal ve optik özellikleri karakterize edilmiştir. Çok işlevli hidrojeller, KPGA, KPCD ve KPGACD, GA ve CD'lerin KP7.5 hidrojeline dahil edilmesiyle elde edilmiştir. GA içeren hidrojeller, DPPH testi ile değerlendirildiği üzere kayda değer antioksidan aktivite sergilemiştir. Biyouyumlulukları göz önüne alındığında, bu hidrojeller yara iyileştirme uygulamalarında potansiyel kullanıma sahiptir.Master Thesis Optimization of cooling energy consumption and thermal comfort in existing residential buildings against climate change: A case study in Mediterranean climate(2023) Uçaryılmaz, Sedef; Arsan, Zeynep DurmuşThe built environment is at risk of facing significant impacts due to climate change and extreme weather occurrences. An adverse consequence of climate change on the construction industry is the degradation of thermal comfort within buildings, leading to increased energy usage for air conditioning. Because existing residential buildings are unprepared for the future climate. The Mediterranean climate is one of the climate classes that will be mostly affected by the global climate, especially in terms of temperature increases. Yet, to access sensitive and accurate climatic data and find the best retrofit scenarios is problematic. Two IoT devices were used in this study to overcome this problem. This study aims to observe and minimize the energy consumption and thermal heat comfort of the flat on the ground floor of a 3-story residential building located in Aydın province, which has a Mediterranean climate, against climatic conditions. In the study, climate predictions for 2049-2050 and 2079-2080 were also made, and it was investigated whether the currently optimized building would remain optimized in future climate conditions. According to the results, while the cooling energy consumption of the currently optimized building decreased by 43% compared to the base case, it decreased by 25% according to the 2049-2050 climate predictions and by 8% according to the 2079-2080 climate predictions. There was no visible change in discomfort hours. In the separate optimization results for the 2049-2050 and 2079-2080 periods of the building, which could not remain optimized according to future climate conditions, a 30% and 21% decrease in cooling energy consumption was observed, respectively, compared to the base case. There was no visible change for discomfort hours. According to this study, it was concluded that the building should be re-optimized in future climate scenarios.Master Thesis Co-ni Separation In Ix-sx Circuit(2023) Ceyhan, Ayşe Merve; Polat, MehmetEti Gübre stands out as the sole facility capable of reclaiming multiple metals from chalcopyrite flotation tails in Turkey. While the overall performance of the process has been deemed satisfactory, the cobalt and nickel products have yet to meet commodity standards. The objective of this project is to ascertain the feasibility of using a series of hydrometallurgical techniques, namely, solvent extraction and ion exchange resin technologies, for attaining premium-quality cobalt and nickel products from a compound comprising cobalt, nickel, and other assorted elements. Extracting cobalt and nickel selectively from impurities, reaching over 95% recovery in a solution containing various elements and steep concentration differences, presents a considerable challenge. Moreover, accomplishing this within an already operational process adds another layer of complexity, demanding alignment with the existing process's stability. The strategy involved selectively separating and refining cobalt and nickel from the sulfate solution through solvent extraction (SX) methods and employing the Ion Exchange (IX) method for further purification.