Yazar "Mutlu, Fatih" seçeneğine göre listele

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    An assessment of the effects of climate change on annual streamflow in rivers in Western Turkey
    (Inderscience Enterprises Ltd, 2018) Kale, Semih; Hisar, Olcay; Sonmez, Adem Yavuz; Mutlu, Fatih; Filho, Walter Leal
    Global warming and its impacts are known to cause serious problems in sustainability of natural resources. In this study, change-point analysis and trend analysis were applied to climatic (temperature, precipitation, evaporation) and streamflow data for Tuzla, Gediz and Buyuk Menderes rivers. Box-Jenkins technique and ARIMA model were used for trend analysis. Results showed that there were decreases in streamflow of all rivers. The paper suggests that climate change effects on streamflow could be changeable and that many factors (anthropogenic effects, geographical location, agricultural activities) should be considered. Management strategies specified regionally are required to mitigate the potential climate change effects.
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    Climate Change Impacts On Streamflow of Karamenderes River (Çanakkale, Turkey)
    (Adem Yavuz SÖNMEZ, 2016) Kale, Semih; Ejder, Tuba; Hisar, Olcay; Mutlu, Fatih
    The main objective of this study was to estimate the potential impacts of climate change due to the global warming on streamflow of Karamenderes River (Çanakkale, Turkey). A 36-years dataset belongs to the streamflow of Karamenderes River and a 43-years dataset belongs to the climatic parameters (temperature, precipitation, and evaporation) obtained from Çanakkale, Bozcaada, Gökçeada meteorological stations in Çanakkale. Time series analysis was applied to the streamflow and climatic parameters. Pettitt change point analysis was performed to detect the change time and trend analysis was applied for estimating the trends. Kendall’s tau and Spearman’s rho correlation tests were applied to find out the relationship between streamflow and the climatic parameters. Pettitt change point analysis results indicated that the change year for streamflow was 1982. Trend analysis results showed that there were decreasing trends in the streamflow and precipitation, and increasing trends in temperature and evaporation. Correlation tests results pointed out that these changes were statistically insignificant. Increasing temperature and decreasing rainfall due to the climate change caused a decrease in the streamflow of the river. In conclusion, the climate change impacts on streamflow could be variable. Also, anthropogenic effects and agricultural activities may affect the responses of the rivers to the global warming and climate change impacts. It is suggested that dam building on the rivers might be beneficial to provide more water for irrigation or other purposes in sustainable way.
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    Effect of Climate Change on Annual Streamflow of Bakırçay River
    (2016) Mutlu, Fatih; Hisar, Olcay; Ejder, Tuba; Kale, Semih
    Küresel ısınma ve bundan kaynaklanan iklim değişikliği doğal kaynakların sürdürülebilirliği açısından önemli sorunlara neden olmaktadır. Bu çalışmada Türkiye'nin batısında yer alan Ege Denizi kıyısındaki 9 meteoroloji gözlem istasyonuna ait 43 yıllık sıcaklık, yağış, buharlaşma gibi meteorolojik parametreler ile aynı bölgede yer alan ve Ege Denizine dökülen Bakırçay nehrine ait 17 yıllık veri seti kullanılmıştır. İklim parametreleri ile nehir akış hızına ait değişim noktalarının belirlenmesi için Pettitt değişim noktası analizi, eğilimlerin belirlendiği trend analizleri için Box-Jenkins yöntemi ve ARIMA modeli, bu parametreler arasındaki ilişkileri belirlemek için ise Kendall's Tau ve Spearman's rho korelasyon testleri kullanılmıştır. Pettitt testi sonucu sıcaklık, buharlaşma ve yağış miktarları için değişim yılları sırasıyla 1997, 1993 ve 1993 iken Bakırçay nehrinin akış hızı için ise 2008 olarak belirlenmiştir. Gerçekleştirilen trend analizleri sonucunda sıcaklık ve buharlaşma miktarında artış; yağış miktarı ve nehir akış hızında ise azalış olduğu tespit edilmiştir. Ancak bu parametrelerin yıllara göre değişimi ile iklim parametreleri ve nehir akış hızı arasındaki korelasyonların istatistiksel olarak önemsiz olduğu belirlenmiştir (p>0.05). Sonuç olarak iklim değişikliğinin nehir akış hızları üzerine olan etkilerinin değişken olabileceği, küresel ısınmanın nehir sistemleri üzerine etkilerinin belirlenmesinde antropojenik etkiler, coğrafi konum, tarımsal faaliyetler, yerleşim yerleri ve nüfus yoğunluğu gibi birçok faktörün de dikkate alınması gerektiği düşünülmektedir. Ayrıca iklim değişikliğinin nehirlerin hidrolojik süreçleri üzerine olan etkilerinin değerlendirilmesinde bölgeye ve amaca uygun değerlendirme modellerinin kullanılması ve özelleştirilmiş yönetim stratejilerinin geliştirilmesi önerilmektedir
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    Novel indium(III) acetate phthalocyanine: synthesis and spectroscopic properties
    (2022) Gökçe, Berra Gülem; Soylu, Hüseyin Kenan; Gürel, Emir; Cengiz, Merve; Mutlu, Fatih; Pişkin, Mehmet Burçin
    A new phthalocyanine 1 was synthesized, containing 2-aminophenoxy groups as tetra from its peripheral positions and indium(III) acetate in its cavity. The structure of 1 was illuminated by elemental analysis, FTIR, UV-vis and fluorescence spectroscopy techniques It is well soluble in solvents such as polar and nonpolar solvent types. Its aggregation properties have been studied both in the solvents mentioned above and in Dimethyl sulfoxide at different concentrations. Its aggregation properties were examined in these solvents as well as in Dimethyl sulfoxide at certain different concentration ranges. With these determined spectroscopic properties, it can be a candidate for use in various technological applications.
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    Restricted effects of climate change on annual streamflow of Sarıçay stream (Çanakkale, Turkey)
    (Adem Yavuz SÖNMEZ, 2016) Kale, Semih; Ejder, Tuba; Acar, Secil; Hisar, Olcay; Mutlu, Fatih
    The global warming and the associated climate change lead to significant problems related to sustainability of natural resources. The observations and research on this issue have shown that most of the water resources have been affected by this phenomenon. These effects of global warming on water resources can be listed as decreased amount of water and droughts in mid-latitude belt. In the current study the changes in the flows of Sarıçay stream in Çanakkale and the time series of the climate parameters related to the region were determined and trends of these variations were estimated. A 34-years data set regarding the river flows between 1978 and 2011 as well as some annual climate parameters such as temperature, evaporation and precipitation have been collected by three meteorological observation stations (Bozcaada, Gökçeada, Çanakkale) for 43 years were used. Pettitt change-point analysis was used to determine the change points for streamflow and climatic parameters. Box-Jenkins method and the ARIMA model were used for trend analyses. Results showed that there was a decrease in precipitation and streamflow on the contrary an increase in evaporation and temperature. However, these changes were statistically insignificant (P > 0.05). In conclusion, climate change effects on river streamflow could be unstable and many factors such as latitudinal location, anthropogenic effects, agricultural activities, population density and residential areas could affect the streamflow.
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    The new zinc(II) phthalocyanine directly conjugated with 4-butylmorpholine units: Synthesis, characterization, thermal, spectroscopic and photophysical properties
    (Elsevier, 2020) Mutlu, Fatih; Piskin, Mehmet; Canpolat, Erdal; OztUrk, Omer Faruk
    In this study, new peripheral tetra-4-butylmorpholine substituted zinc(II) phthalocyanine was synthesized through C-C bond formation using the palladium catalyzed Suzuki-Miyaura coupling reaction. Its structure was characterized by elemental analysis, FT-IR, H-1 NMR, C-13 NMR, UV-vis, fluorescence, and MALDI-TOF-mass spectroscopic techniques. Its thermal property were evaluated by thermogravimetric analysis and differential scanning calorimetry. In addition, the photophysical properties of the zinc(II) phthalocyanine were also investigated in DMSO. (C) 2019 Published by Elsevier B.V.
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    Yeni ftalosiyanin bileşiklerinin sentezi ve karakterizasyonu
    (Çanakkale Onsekiz Mart Üniversitesi, 2019) Mutlu, Fatih; Öztürk, Ömer Faruk
    Hazırlanan bu tez çalışmasında; fotodinamik tedavilerde ve çeşitli teknolojik alanlarda kullanılabilmesi amacıyla polar ve apolar çözücülerde yüksek derecede çözünebilen ve uzun dalga boyunda absorbsiyon yapabilen, yapısında biyoaktif gruplar içeren yeni çinko (II) metalli ftalosiyanin kompleksleri sentezlenmiştir. Bu amaçla; periferal konumlarından tetrakis ve oktakis olarak iyot sübstitüentli çinko(II) metalli ftalosiyanin komplekslerinden çıkarak hedef ürünler periferal konumlarından tetrakis ve oktakis 4-morfolino propil sübstitüentli çinko (II) metalli ftalosiyanin kompleksleri Suzuki-Miyaura Kenetlenme Reaksiyonu ile sentezlenmiştir. Elde edilen ürünler, UV-Vis, 1H-NMR, MALDI-TOF Mass ve Floresans gibi spektreskopik yöntemlerle karakterize edilmiştir.