• Study of drying of κ-Carrageenan gel at various temperatures using a fluorescence technique 

  Tarı, Özlem; Pekcan, Mehmet Önder (Taylor & Francis, 2008-01)

  The steady-state fluorescence technique was used to study drying of κ-carrageenan gel at various temperatures. Pyranine was doped as a fluorescence probe, and scattered light, Isc, and fluorescence intensities, I, were ...

• Projected changes in extreme temperature and precipitation indices over CORDEX-MENA domain 

  Öztürk, Tuğba; Saygılı Aracı, F. Sibel; Kurnaz, Mehmet Levent (MDPI AG, 2021-05)

  In this study, projected changes in climate extreme indices defined by the Expert Team on Climate Change Detection and Indices were investigated over Middle East and North Africa. Changes in the daily maximum and minimum ...

• Business-as-usual will lead to super and ultra-extreme heatwaves in the Middle East and North Africa 

  Zittis, George; Hadjinicolaou, Panos; Almazroui, Mansour; Bucchignani, Edoardo; Driouech, Fatima; El Rhaz, Khalid; Kurnaz, Levent; Nikulin, Grigory; Ntoumos, Athanasios; Öztürk, Tuğba (Nature Research, 2021-03-21)

  Global climate projections suggest a significant intensification of summer heat extremes in the Middle East and North Africa (MENA). To assess regional impacts, and underpin mitigation and adaptation measures, robust ...

• River, alluvial fan and landslide interactions in a tributary junction setting: Implications for tectonic controls on Quaternary fluvial landscape development (Central Anatolian Plateau northern margin, Turkey) 

  McClain, Kevin P.; Yıldırım, Cengiz; Çiner, Tahsin Attila; Sarıkaya, M. Akif; Özcan, Orkan; Görüm, Tolga; Köse, Oğuzhan; Şahin, Sefa; Güneç Kıyak, Nafiye; Öztürk, Tuğba (Elsevier B.V., 2021-03-01)

  Along the western flank of the northern margin (Central Pontides) of the Central Anatolian Plateau, the humidity from the Black Sea is much higher than the central and eastern flanks and creates a complex relationship ...

• Strategies for the evolution of sex 

  Tüzel, Erkan; Sevim, Volkan; Erzan, Ayşe (American Institute of Physics Inc., 2001-12)

  The maintenance of a macroscopic sexual population is addressed. As a scenario, the mechanism of random conversion to sex, in the presence of a constant rate of mutation is examined. This scenario is very closely related ...

• Quaternary rock uplift rates and their implications for the western flank of the North Anatolian Fault restraining bend; inferences from fluvial terrace ages 

  McClain, Kevin P.; Yıldırım, Cengiz; Ciner, Attila; Şahin, Sefa; Sarıkaya, Mehmet Akif; Özcan, Orkan; Güneç Kıyak, Nafiye; Öztürk, Tuğba (Blackwell Publishing Ltd, 2020-10-01)

  In the western flank of the North Anatolian Fault restraining bend (i.e., Central Pontides), the Filyos River incises through the uplifting Karabük Range, creating the ~1.7-km-deep Filyos River Gorge on the hanging wall ...

• İznik Gölü kıyılarındaki yalıtaşlarının kökeni, yaşı ve geç kuvaterner göl seviye değişimleri ile bağlantıları 

  Erginal, Ahmet Evren; Bozcu, Mustafa; Güneç Kıyak, Nafiye; Yiğitbaş, Erdinç (Tübitak, 2011-09)

  İznik Gölü kıyılarında yalıtaşı oluşumunun kökeni, yaşı ve göl su seviyesi değişimleri ile bağlantılarının ele alındığı bu projede göl kıyısında 10 farklı lokalitede saptanan yalıtaşlarının jeomorfolojik, mineralojik-petrografik ...

• Future global meteorological drought hot spots: A study based on CORDEX data 

  Spinoni, Jonathan; Barbosa, Paulo; Bucchignani, Edoardo; Kurnaz, Mehmet Levent; Öztürk, Tuğba (American Meteorological Society, 2020-05-01)

  Two questions motivated this study: 1) Will meteorological droughts become more frequent and severe during the twenty-first century? 2) Given the projected global temperature rise, to what extent does the inclusion of ...

• Impacts of climate change on precipitation climatology and variability in Turkey 

  Türkeş, Murat; Turp, M. Tufan; An, Nazan; Öztürk, Tuğba; Kurnaz, Mehmet Levent (Springer International Publishing Ag, 2020)

  In this chapter, changes in seasonal precipitation climatology, extreme weather conditions, and aridity conditions of Turkey are evaluated for the period of 2021-2050 with respect to the reference period of 1971-2000 by ...

• A mean field model near the NAC point in liquid crystals 

  Enginer, Yücel; Salihoğlu, Selami; Yurtseven, Hamit (Physical Soc Republic China, 2002-10)

  In this study we obtain the phase line equations for the nematic-smectic A (NA), smectic A-smectic C (AC) and nematic-smectic C (NC) transitions using a mean field model. We fit these phase line equations to the experimental ...

• Critical behavior of thermal phase transitions of iota-carrageenan in CaCl2 solution 

  Özbek, Haluk; Pekcan, Mehmet Önder (Elsevier B.V., 2006-07-15)

  In situ photon transmission method was applied to study thermal phase transitions of ?-carrageenan in CaCl2 solution. Coil-to-helix (c-h) and helix-to-dimer (h-d) transitions were detected upon cooling. An extra dimer-to-dimer ...

• Reversible film formation from PS doped PNIPAM particles in various compositions 

  Uǧur, Şaziye; Yargı, Önder; Pekcan, Mehmet Önder (John Wiley & Sons Inc, 2008-02)

  Film formation from polystyrene (PS) doped poly(N-isopropylacrylamide) (PNIPAM) particles was studied using photon transmission technique. The transmitted light intensity, Itr, was monitored during film formation process. ...

• Studying on the small molecule diffusion into hydrogels: a fluorescence study 

  Evingür, Gülşen Akın; Karslı, Kadir; Pekcan, Mehmet Önder (Amer Inst Physics, 2007)

  In situ steady state fluorescence experiments (SSF) were reported during the diffusion of water molecules into PAAm in gels at various temperatures. The fluorescence emission intensities, Ip increased continuously as water ...

• Calix[4]amine Langmuir-Blodgett thin film sensing properties against volatile organic compounds 

  Şen, Sibel; Çapan, Rifat; Özbek, Zikriye; Özel, Mehmet Emin; Stanciu, Gheorghe A.; Davis, Frank (IOP Publishing LTD, 2019)

  Thin films of CBAMINE were deposited at air-water interface by the method of Langmuir-Blodgett (LB) technique onto a suitable substrate. Atomic force microscopy technique was used to characterize its thin film properties. ...

• The conformal Penrose limit: back to square one 

  Güven, Rahmi (IOP Publishing LTD, 2008-08-21)

  We show that the conformal Penrose limit is an ordinary plane wave limit in a higher dimensional framework which resolves the spacetime singularity. The higher dimensional framework is provided by Ricci-flat manifolds which ...

• Dissolution of Al2O3-polystyrene latex composites: A fluorescence study 

  Uǧur, Şaziye; Tepehan, Fatma Zehra; Pekcan, Mehmet Önder (Taylor & Francis Ltd, 2005)

  This work reports the use of the steady state fluorescence (SSF) technique to study dissolution of a composite film formed from a mixture of Al 2O3 and polystyrene (PS) latex particles. The composite films were cast from ...

• Structure and expression analyses of the Fertilization Independent Seed (FIS) gene orthologs of the apomict Boechera species 

  Yılmaz, Sibel; Gözükırmızı, Nermin; Scott, Rod John; Taşkın, Kemal Melih (Society for Biology and Biotechnology, 2015)

  In this study Arabidopsis thaliana Fertilization Independent Seed 2 (FIS2) and Fertilization Independent Endosperm (FIE) genes orthologs were analysed in pseudogamous apomict and sexual Boechera species. FIS genes encode ...

• Technical climate change adaptation options of the major ski resorts in Bulgaria 

  Demiroğlu, Osman Cenk; Turp, Mustafa Tufan; Öztürk, Tuğba; An, Nazan; Kurnaz, Mehmet Levent (Springer International Publishing, 2016-01-01)

  Climate change has been and increasingly will be a major threat to the ski tourism industry, whose survival is highly dependent on the existence of snow cover of sufficient depth and duration. For this matter, it is even ...

• Determination of pre-gelation and post-gelation activation energies during free radical crosslinking copolymerization 

  Kaya Aktaş, Demet; Pekcan, Mehmet Önder (Taylor & Francis Ltd, 2005)

  Steady-state fluorescence (SSF) and dilatoraetric techniques were used to study the free-radical crosslinking copolymerization (FCC) of styrene (S) and divinylbenzene (DVB) in bulk. The gel points (t g) were recorded by ...

• Comparision of critical parameters of polymerization and gelation processes: A fast transient fluorescence study 

  Kaya Aktaş, Demet; Pekcan, Mehmet Önder (World Scientific Publ Co Pte Ltd, 2005-03-10)

  The fast transient fluorescence technique was used to study free-radical polymerization and crosslinking copolymerization of styrene. Ethylene glycol dimethacrylate and Pyrene were used as crosslinking agent and fluorescence ...

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