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Articles 991 - 1020 of 10317
Full-Text Articles in Physical Sciences and Mathematics
Synthesis And Investigation Of Antiproliferative Activity Of Ru-Nhc Complexes Against C6 And Hela Cancer Cells, Ramazan Paşahan, Mi̇tat Akkoç, Şeyma Yaşar, Tuğba Kul Köprülü, Şaban Teki̇n, Sedat Yaşar, İsmai̇l Özdemi̇r
Synthesis And Investigation Of Antiproliferative Activity Of Ru-Nhc Complexes Against C6 And Hela Cancer Cells, Ramazan Paşahan, Mi̇tat Akkoç, Şeyma Yaşar, Tuğba Kul Köprülü, Şaban Teki̇n, Sedat Yaşar, İsmai̇l Özdemi̇r
Turkish Journal of Chemistry
The 2-methylpyridine, 2-diethylaminoethyl, and isopentyl linked a series of symmetric and unsymmetric benzimidazolium salts 2a-e were prepared and used in the synthesis of silver-N-heterocyclic carbene (NHC) complexes (3a-e). The Ru(II)-NHC complexes (4a-h) were synthesized via transmetalation reaction from 3a-e. 4a-h complexes were converted to Ru(II)-NHC.HCl complexes (5ah) by HCl solution of diethyl ether and characterized by different spectroscopic techniques such as 1H and 13C NMR, LC/MS-Q-TOF, FT-IR, elemental analysis, and melting point detection. We examined the effect of the structural difference of complexes on anticancer activity via different arenes and metal centers. Antiproliferative activity of 5a-h and 3a was tested …
Improved Visible Light-Driven Photocatalytic Degradation Of Methylene Blue And Methyl Red By Boron-Doped Carbon Quantum Dots, Bi̇rcan Haspulat Taymaz, Çi̇sem Kirbiyik Kurukavak, Handan Kamiş, Mahmut Kuş
Improved Visible Light-Driven Photocatalytic Degradation Of Methylene Blue And Methyl Red By Boron-Doped Carbon Quantum Dots, Bi̇rcan Haspulat Taymaz, Çi̇sem Kirbiyik Kurukavak, Handan Kamiş, Mahmut Kuş
Turkish Journal of Chemistry
The synthesis of fluorescent carbon quantum dots (CQDs) and their applications have attracted great attention due to their excellent properties. Especially, the unique visible-light absorption and photo-induced electron transfer properties make CQDs available in photocatalytic degradation of organic dye pollutants in water resources. Herein, we synthesized nondoped CQDs and boron-doped CQDs (B-CQDs) by hydrothermal method and compared their photocatalytic degradation activity of methylene blue (MB) and methyl red (MR) dyes under visible light irradiation. The characterization outcomes showed that the optical and structural properties can be easily improved by doping with hetero-atom, thereby photocatalytic performance. As expected, the photodegradation performance …
Investigation Of Antibacterial Properties Of Polyacrylonitrile Fibers Modified By New Functional Groups And Silver Nanoparticles, Zeynep Okay, Meryem Kalkan Erdoğan, Başar Karaca, Meral Karakişla, Mehmet Saçak
Investigation Of Antibacterial Properties Of Polyacrylonitrile Fibers Modified By New Functional Groups And Silver Nanoparticles, Zeynep Okay, Meryem Kalkan Erdoğan, Başar Karaca, Meral Karakişla, Mehmet Saçak
Turkish Journal of Chemistry
This work reports the surface modification of polyacrylonitrile (PAN) fibers by graft copolymerization to ensure the decoration of homogenous and dense Ag nanoparticles. Two facile and subsequent modification processes resulted in a PAN fiber composite with an intact fibrous structure, sufficiently conductive for antistatic application and antibacterial activity. In the first step, some chemically attractive monomers and monomer mixtures, such as acrylic acid (AA), AA-itaconic acid (AA-IA), AA-acrylamide (AA-AAm), were introduced to the fiber surface by grafting. The grafting process was evidenced by FTIR, 1H-NMR, and SEM techniques. The second step aimed to form a chelate structure by Ag + …
Discrimination And Authentication Of Geographical Origin Of Turkish Taşköprü Garlic By Investigating Volatile Organosulfur Compound Profiles And Multivariate Analyses, Orhan Destanoğlu
Turkish Journal of Chemistry
Nowadays, counterfeiting and adulteration on foods take place around the world in a variety of ways. Identification and authentication of geographical origin of agricultural products has great importance not only for food safety, but for protection of registrations as well. This study aimed at discriminating the Turkish Taşköprü garlic, possessing protected geographical indication (GI) in Turkey and GI registration from the European Union, from the other samples. For this reason, the combination of headspacegas chromatography-mass spectrometry (HS-GC-MS) analysis of the volatile organosulfur compounds (VOSCs) and two multivariate analysis techniques, namely hierarchical cluster analysis (HCA) and principal component analysis (PCA), were …
Fabrication Of Electrospun Cellulose-Derived Nanofiber Membranes With Enhanced Stability Properties Of Arginase, Ceyhun Işik, Mustafa Teke
Fabrication Of Electrospun Cellulose-Derived Nanofiber Membranes With Enhanced Stability Properties Of Arginase, Ceyhun Işik, Mustafa Teke
Turkish Journal of Chemistry
In this study, cellulose acetate (CA)/polyvinylpyrrolidone (PVP) and CA/PVP/Mn2+ nanofibers were produced by the electrospinning method, and these cellulose-derived membranes were used as carriers for arginase immobilization for the first time. The structural and morphological analysis of these cellulose-derived nanofibers were determined by attenuated total reflection-Fourier to transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), X-ray diffraction (XRD), and scanning electron microscopy (SEM). After the immobilization process, it was observed that the thermal properties of the cellulose-derived nanofibers especially improved. The optimum temperature value for free arginase was found to be 35 °C, and this value was found to be 40 …
Detailed Structure Analyses On Cobalt Doped Pbtio3 Powders, Ebru Erünal
Detailed Structure Analyses On Cobalt Doped Pbtio3 Powders, Ebru Erünal
Turkish Journal of Chemistry
The identification of the defects and secondary phases which significantly affect the material properties are of crucial importance. In this study, a systematic structure examination of PbTiO3 and cobalt doped PbTiO3 powder ceramics was carried out. X-ray diffraction (XRD), Fourier-transform infrared (FT-IR), Raman, and electron paramagnetic resonance (EPR) spectroscopies were applied along with nonsimultaneous thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The doped and undoped PbTiO3 materials were synthesized via a practical sol-gel route that takes place at 50 °C. The perovskite formation for both materials was verified. The dislocation density of cobalt doped PbTiO3 was found to be …
Comprehensive Evaluation Of Reseda Lutea L. (Wild Mignonette) And 7 Isolated Flavonol Glycosides: Determination Of Antioxidant Activity, Anti-Alzheimer, Antidiabetic And Cytotoxic Effects With In Vitro And In Silico Methods, Hati̇ce Kiziltaş
Turkish Journal of Chemistry
In this study, anticholinergic, antidiabetic, antioxidant and cytotoxic activities of Reseda lutea L. (R. lutea) were determined. Ethanol extracts of R. lutea (EERL) and water extract of R. lutea (WERL) were prepared for biochemical analysis. The antioxidant capacities of EERL and WERL were evaluated with 6 different methods. In addition, acetylcholinesterase (AChE), α-amylase and α-glycosidase enzyme inhibition by EERL were measured. According to the results, EERL exhibited high inhibition effects against α-amylase, α-glycosidase and AChE enzymes. The IC50 values of EERL against AChE (2.21 μg/mL), α-glycosidase (1.38 μg/mL), and α-amylase (0.11 μg/mL) were determined. Also, high cytotoxic effect of EERL …
A Theoretical Study Of Co Adsorption On Cu(211) Surface With Coverage Effects, Murat Oluş Özbek
A Theoretical Study Of Co Adsorption On Cu(211) Surface With Coverage Effects, Murat Oluş Özbek
Turkish Journal of Chemistry
CO adsorption on the Cu(211) surface was investigated using energy, geometry and vibrational data, which were produced through periodic DFT computations. Adsorption on the (111) terrace, as well as the previously reported top and bridge sites of the step-edges, was studied at 0.25, 0.33, 0.50, 0.66, 0.75, and 1.00 monolayer (ML) CO coverage. Results showed that up to and including 0.50 ML, on-top or bridge adsorption is preferred on the step-edges. When 0.50 ML is exceeded, top-bridge alternating patterns become feasible on the step edges along with possible shifts towards the terrace. Several feasible patterns were identified at 0.66, 0.75, …
Selective Nanosensor Based On Folic Acid Imprinted Nanostructures, Kevser Kuşat, Serdar Şanli, Suna Ti̇mur, Si̇nan Akgöl
Selective Nanosensor Based On Folic Acid Imprinted Nanostructures, Kevser Kuşat, Serdar Şanli, Suna Ti̇mur, Si̇nan Akgöl
Turkish Journal of Chemistry
Folic acid, which provides the transfer of single carbon atoms in synthesis reactions and metabolic cycles in metabolism, is very important for metabolism. Folic acid also plays an important role in nucleotide synthesis and methylation reactions. There are many disorders caused by defective folic acid metabolism and lack of folic acid. Today, innovative, cost-effective methods are needed to develop folic acid determination methods. The main objective of this study is the development of surface-printed carbon electrodes (SPCE) modified with folic acid imprinted nanostructures (FA-Imp-poly(MPTS-rGO-co-NAT), which will be used for the first time for folic acid determination in commercially human blood …
Simulation Of Two Electrode Reactions Coupled By The Chemical Reaction, Milivoj Lovric
Simulation Of Two Electrode Reactions Coupled By The Chemical Reaction, Milivoj Lovric
Turkish Journal of Chemistry
A model of an ECE mechanism consisting of two reversible electrode reactions coupled by the kinetically controlled, second order, reversible chemical reaction is developed for the staircase cyclic voltammetry on the rotating disk electrode. The relationship between the limiting current of the second wave and the rate constant of chemical reaction is investigated. The concentration of electroinactive component of the forward reaction influences the half-wave potential of the first wave and the limiting current of the second wave. The responses of the mechanisms with reversible and irreversible chemical reactions are compared.
1-D And 2-D Coordination Networks Based On Tetrathiacalix[4]Arene Derivative Generated With Mercury And Cobalt Salts, Huri̇ye Akdaş Kiliç, Ernest Graf, Mi̇r Wai̇s Hossei̇ni̇, Nathali̇e Kyri̇tsakas
1-D And 2-D Coordination Networks Based On Tetrathiacalix[4]Arene Derivative Generated With Mercury And Cobalt Salts, Huri̇ye Akdaş Kiliç, Ernest Graf, Mi̇r Wai̇s Hossei̇ni̇, Nathali̇e Kyri̇tsakas
Turkish Journal of Chemistry
The combination of four iso-nicotinate appended tetrathiacalix[4]arene (TCA-1) in 1,2-alternate imposed conformation behaving as neutral tectons with Co(II)Cl2 and Hg(II)Cl2 metallic salts, leads to the formation of neutral, new coordination networks. Indeed, the tetrasubstituted TCA-1 derivative leads to a 1D coordination polymer with Co(II)Cl2 and a 2D grid-like network with, Hg(II)Cl2. The effect of the nature of the metal used on the dimensionality was demonstrated by X-ray diffraction studies on a single crystal.
Green Synthesis, Characterisation Of Au And Ag Nanoparticles By Various Bioextracts And Their Usability At Graphite Electrode Modification, Emi̇ne Arslan, Ender Bi̇çer, Eli̇f Sekmen, Semi̇ha Çakir
Green Synthesis, Characterisation Of Au And Ag Nanoparticles By Various Bioextracts And Their Usability At Graphite Electrode Modification, Emi̇ne Arslan, Ender Bi̇çer, Eli̇f Sekmen, Semi̇ha Çakir
Turkish Journal of Chemistry
In this study, the biosynthesis of Au and Ag nanoparticles (AuNp and AgNp) with a green chemistry approach was performed by using bioextracts of various fruits and vegetables (Lycopersicon esculentum (LE), Cucumis sativus (CS), Malus domestica (MD), Cucurbita pepo (CP), Apiumgraveolens var. rapaceum (AVR), Prunus cerasifera (PC), Oleraceae var. botrytis (OVB)). In the determination of optimum experimental conditions, the parameters such as the type and concentration of bioextract, concentration of metal ion solutions, the ratio of metal ion solution to bioextract, pH, reaction time and temperature were found to be significant. The characterisation of AuNp and AgNp synthesized by providing …
Intrinsically Fluorescent And Quercetin Loaded Highly Crosslinked Polyphosphazene Nanospheres: Synthesis, Characterization And Fluorescence Properties, Si̇mge Meti̇noğlu Örüm
Intrinsically Fluorescent And Quercetin Loaded Highly Crosslinked Polyphosphazene Nanospheres: Synthesis, Characterization And Fluorescence Properties, Si̇mge Meti̇noğlu Örüm
Turkish Journal of Chemistry
Highly crosslinked, inorganic-organic hybrid and intrinsically fluorescent polyphosphazene nanospheres bearing hydroxyl groups on the surface are facilely generated via a one-pot polycondensation of octachlorocyclotetraphosphazene, fluorescein and quercetin. The resulting nanospheres were characterised by scanning electron microscopy (SEM), energy-dispersive X-ray analysis (EDX), Fourier transform infrared spectroscopy (FTIR), dynamic light scattering (DLS), X-ray diffraction analysis (XRD) and ultraviolet-visible spectroscopy (UV-vis) techniques. The average diameter of the nanospheres was determined as 379 nm. Also, quercetin which is both a monomer and an anticancer drug was loaded to the nanospheres as 446 mg g-1. The obtained nanospheres possess outstanding disperse ability in both aqueous …
A Simple Quantitative Method Using Tlc-Image Analysis To Determine Fructooligosaccharides (Fos) In Food Samples, Diana Beatriz Muñiz Márquez, Marco Antonio Mártinez Cervantes, Alain Martinez, Cristobal Aguilar, Pedro Agui̇lar Zarate, Jorge Enrique Wong Paz
A Simple Quantitative Method Using Tlc-Image Analysis To Determine Fructooligosaccharides (Fos) In Food Samples, Diana Beatriz Muñiz Márquez, Marco Antonio Mártinez Cervantes, Alain Martinez, Cristobal Aguilar, Pedro Agui̇lar Zarate, Jorge Enrique Wong Paz
Turkish Journal of Chemistry
The thin-layer chromatography technique (TLC) is a simple and inexpensive analysis commonly used to identify qualitatively the presence of carbohydrates in food samples such as mono- di and oligosaccharides particularly. TLC assay could be improved using image processing software for the semiquantitative determination of this type of compound. In the present work, TLC-image analysis with Silica Gel 60 TLC plates was used for the semiquantitative determination of 6 standards of carbohydrates (glucose, fructose, sucrose, 1-kestose, nystose, and fructofuranosylnystose). Subsequently, the areas of the spots of each compound were determined by digitizing in a conventional office scanner. Then, the segmentation of …
Development Of Software For The Calculation Of Kinetic Parameters From Solid Phase Reaction Data, Application To Synthesized N'-(4-Chlorobenzoyl)-N,N-Di-N-Butylthiourea Ligand And Its Nickel (Ii) Complex, Esra Kalem, Nevzat Külcü
Development Of Software For The Calculation Of Kinetic Parameters From Solid Phase Reaction Data, Application To Synthesized N'-(4-Chlorobenzoyl)-N,N-Di-N-Butylthiourea Ligand And Its Nickel (Ii) Complex, Esra Kalem, Nevzat Külcü
Turkish Journal of Chemistry
In gas and liquid phase reactions, the conversion of starting materials to products is directly controlled by the rate of the reaction, whereas in solid state reactions, it is determined by the rate of diffusion. When working with thermal analysis methods, tens of thousands of data to be obtained from measured differential thermal analysis (DTA), thermal gravimetry (TG), and differential thermal gravimetry (DTG) curves must first be digitized, and then these digitized data must be converted to concentrations and thermal values using appropriate software programs. Companies that produce devices using thermal analysis techniques generally adapt the encrypted software programs they …
Impacts Of Some Metal Ions On Glutathione S-Transferase In The Liver Of Chalcalburnus Tarichi: An Endemic Species Of Lake Van, Muhammet Serhat Özaslan, Mehmet Çi̇ftci̇
Impacts Of Some Metal Ions On Glutathione S-Transferase In The Liver Of Chalcalburnus Tarichi: An Endemic Species Of Lake Van, Muhammet Serhat Özaslan, Mehmet Çi̇ftci̇
Turkish Journal of Chemistry
Glutathione-S-transferase (GSTs) is a multifunctional enzyme that provides homeostasis by catalyzing the first step of the formation of mercapturic acid, the end product in detoxification metabolism. They can prevent reactive electrophilic compounds from harming the body by covalently binding the same type of compounds to each other. In this study, we determined the in vitro inhibitory effects of metal ions such as Cu2+, Cd2+, Ag+, and Co2+ on GST enzyme activity. For this aim, GST was purified from C. tarichi Pallas liver with 37.36% yield and 29.304 EU/mg specific activity using the chromatographic method. The Vmax values of liver GST …
Determination Of Triacylglycerol And Fatty Acid Compositions Of Impatiens Seed Oils Using Reverse Phase High Performance Liquid Chromatography, Anh Van Nguyen, Anh Thi Ngoc Vu, Victor Ivanovic Deineka, Huy-Trung-Kien Nguyen
Determination Of Triacylglycerol And Fatty Acid Compositions Of Impatiens Seed Oils Using Reverse Phase High Performance Liquid Chromatography, Anh Van Nguyen, Anh Thi Ngoc Vu, Victor Ivanovic Deineka, Huy-Trung-Kien Nguyen
Turkish Journal of Chemistry
In the present work, triacylglycerol and fatty acid compositions of Impatiens balsamina L. and Impatiens walleriana Hook.f. seed oils were determined using reverse phase high performance liquid chromatography with both refractive index and spectrophotometric detections. The presence of conjugated octadecatetraenoic moieties was confirmed by UV and IR spectroscopy. Triacylglycerol (TAG) compositions were performed using an incremental approach and confirmed by the results of MS and electronic spectra. The quantitative analysis of TAG was achieved by careful calibration, introducing correction factors for the sensitivity of each compound. The results showed that both Impatiens seed oils contain the same 23 TAGs. The …
Overview On Gplates: Focus On Plate Reconstruction, Shatavisa Chatterjee, Soumyajit Mukherjee
Overview On Gplates: Focus On Plate Reconstruction, Shatavisa Chatterjee, Soumyajit Mukherjee
Turkish Journal of Earth Sciences
Plate tectonic reconstructions have been employed in geosciences since 1970s, in the context of hydrocarbon exploration, regional geology and paleobiology. Such studies have given valuable inputs for climate and geodynamic computations, present-day mantle structure, models of plate motion, and the interpretation of the drift of hotspots, true polar wander (TPW), sea level and stratigraphic signals. However, geodynamic models generated in the past by incorporating global plate tectonic reconstructions have limitations. To overcome this, GPlates software brings forward a new era of interactive plate tectonic reconstruction software integrated with GIS databases that incorporates a wide variety of geological and geophysical data. …
Determination Of Recent Tectonic Deformations Along The Tuz Gölü Fault Zone In Centralanatolia (Turkey) With Gnss Observations, Cemi̇l Gezgi̇n, Semi̇h Ekerci̇n, İbrahi̇m Ti̇ryaki̇oğlu, Bahadir Aktuğ, Hedi̇ye Erdoğan, Esra Gürbüz, Osman Orhan, Süleyman Sefa Bi̇lgi̇li̇oğlu, Ahmet Tarik Torun, Hali̇l İbrahi̇m Gündüz, Osman Oktar, Cezmi̇ Türkmen, Efdal Kaya
Determination Of Recent Tectonic Deformations Along The Tuz Gölü Fault Zone In Centralanatolia (Turkey) With Gnss Observations, Cemi̇l Gezgi̇n, Semi̇h Ekerci̇n, İbrahi̇m Ti̇ryaki̇oğlu, Bahadir Aktuğ, Hedi̇ye Erdoğan, Esra Gürbüz, Osman Orhan, Süleyman Sefa Bi̇lgi̇li̇oğlu, Ahmet Tarik Torun, Hali̇l İbrahi̇m Gündüz, Osman Oktar, Cezmi̇ Türkmen, Efdal Kaya
Turkish Journal of Earth Sciences
The Tuz Gölü Fault Zone (TGFZ) is one of the most important active tectonic structures of Central Anatolia. The morphotectonic features of the TGFZ and the distribution of the epicenters of earthquakes over magnitude 5.0 show that this fault zone remains active today. In this study, the deformation of the TGFZ is determined with high sensitivity using geodetic measurements. To obtain accurate information about the deformation of the TGFZ, 24 GNSS sites and two continuously operating reference stations were constructed in the southern part of the TGFZ. Between 2018 and 2020, Global Navigation Satellite Systems (GNSS) measurements were made on …
Mineralogical And Paleobotanical Investigations Of Oligo-Miocene Petrified Wood Fromthe Southwest Of Thrace Basin (Nw Turkey), Burcu Üner, Sabah Yilmaz Şahi̇n, Ünal Akkemi̇k
Mineralogical And Paleobotanical Investigations Of Oligo-Miocene Petrified Wood Fromthe Southwest Of Thrace Basin (Nw Turkey), Burcu Üner, Sabah Yilmaz Şahi̇n, Ünal Akkemi̇k
Turkish Journal of Earth Sciences
Petrified wood samples are found within terrestrial sediments belonging to the Late Oligocene-Early Miocene Danişmen Formation in Malkara-Keşan located in the southwest of the Thrace Basin. The petrified wood in both regions is usually silicified and partly coalified. The silicification of the Tertiary wood in the Malkara-Keşan region is associated with volcanic activity and coeval sedimentation. Thin sections from petrified wood samples were taken as transverse, tangential, and radial sections. The mineralogicalpetrographic- botanical studies were carried out under a polarizing and botanical microscope. Opal-moganite-chalcedony-quartz, which are different polymorphs of silica, were detected under the microscope in the petrified wood. Results …
No Sand Shipment For Cleopatra By Antonius: Resedimentary Origin For The Ooidal Sand Beach Of Sedir Island (Aegean Coast Of Sw Anatolia), Mehmet Ci̇hat Alçi̇çek
No Sand Shipment For Cleopatra By Antonius: Resedimentary Origin For The Ooidal Sand Beach Of Sedir Island (Aegean Coast Of Sw Anatolia), Mehmet Ci̇hat Alçi̇çek
Turkish Journal of Earth Sciences
No abstract provided.
The Provenance Of Coarse-Grained Turbidite Sandstones In The Kırkgeçit Formation(Western Part Of The Elazığ Basin-East Turkey), Onur Alkaç, Ercan Aksoy
The Provenance Of Coarse-Grained Turbidite Sandstones In The Kırkgeçit Formation(Western Part Of The Elazığ Basin-East Turkey), Onur Alkaç, Ercan Aksoy
Turkish Journal of Earth Sciences
Modal analysis of sandstones for conglomerate rich marine basins is useful for investigating the provenance types surrounded by plate tectonics. Different kinds of siliciclastic rocks are important indicators for defining the paleogeography and geotectonic conditions of the sedimentary basin by provenance analysis. This paper, which focuses on the petrography and provenance of conglomerate rich turbidite systems, is one of the rarest studies on the sedimentary characteristics in the scientific literature. In this context, the study was carried out in the western part of the Elazığ Basin. The Middle Eocene?Oligocene basin infill called the Kırkgeçit Formation is characterised by the conglomerate …
Hydrochemical Characteristics And Geothermometry Applications Of Thermal Waters Inthe Çürüksu Graben, Western Turkey, Ali̇ Gökgöz, Hali̇m Mutlu, Mehmet Ali̇ Akman
Hydrochemical Characteristics And Geothermometry Applications Of Thermal Waters Inthe Çürüksu Graben, Western Turkey, Ali̇ Gökgöz, Hali̇m Mutlu, Mehmet Ali̇ Akman
Turkish Journal of Earth Sciences
In this study, we investigate chemical and isotopic characteristics of low-temperature geothermal waters issuing from carbonate reservoirs in the Çürüksu Graben within the eastern termination of the Büyük Menderes Graben in western Turkey. Temperatures and pH values of geothermal waters vary from 20.1 to 24.6 °C and 6.62 to 7.11 and those of cold waters are 17.1 to 19.9 °C and 6.85 to 7.72, respectively. Geothermal waters are of Ca-HCO3 and Ca-SO4 types whereas cold waters are characterized by these two types and Mg-HCO3 as well. δ18O and δD values of samples vary from ?9.27‰ to -7.69‰ (VSMOW) and -58.06‰ …
Wide-Area Ground Deformation Monitoring In Geothermal Fields In Western Turkey, Gökhan Aslan, Hakki Aydin, Zi̇yadi̇n Çakir
Wide-Area Ground Deformation Monitoring In Geothermal Fields In Western Turkey, Gökhan Aslan, Hakki Aydin, Zi̇yadi̇n Çakir
Turkish Journal of Earth Sciences
The large-scale production and injection of geothermal fluids induce pressure, volume, and temperature gradient changes in the subsurface, which may result in surface deformation as well. Interferometric synthetic aperture radar (InSAR) is a promising utility for monitoring ground surface deformation and inferring subsurface reservoir operations that are difficult to observe directly. This study provides the first wide-area InSAR-derived long-term ground deformation across major geothermal fields in western Turkey. It aims to identify ground deformation hotspots within the geothermal exploitation sites and analyze their relationship with energy production and pumping. In the present study, the whole 2014?2020 Sentinel 1-A and 1-B …
Reducing Uncertainty With Fault Seal Analysis: A Case Study Of Jherruck Block, Lowerindus Basin, Pakistan, Mudassar Nawaz, Muhammad Rustam Khan, Umair Bin Nisar, Muhammad Rizwan Mughal
Reducing Uncertainty With Fault Seal Analysis: A Case Study Of Jherruck Block, Lowerindus Basin, Pakistan, Mudassar Nawaz, Muhammad Rustam Khan, Umair Bin Nisar, Muhammad Rizwan Mughal
Turkish Journal of Earth Sciences
Faults can be either conduits or baffles for hydrocarbon flow. Assessing the sealing potential of faults plays a vital role in reducing the risks associated with hydrocarbon exploration. The study area is located in Jherruck Block, Lower Indus Basin, Pakistan. Several intervals within the Lower Goru Formation in Lower Indus Basin are proven hydrocarbon reservoirs. The main aim of the study is to predict the cause of failure of 3 wells (Jherruck B-1, Jamali-1, and Jamali Deep-1), and to propose a new well location based on juxtaposition analysis and shale gouge ratio (SGR). The Upper Sands (sandstone) of the Lower …
Walkaway Vertical Seismic Profiling (Wvsp) Modeling And Imaging Study Along Faultedcoal Seams Over A High Velocity Limestone Model: A Synthetic Study, Cemal Erdemi̇r
Turkish Journal of Earth Sciences
The problem of collecting reflection data from the layers below a high velocity layer (HVL) and imaging those layers accurately is solved using walkaway vertical seismic profiling (WVSP) technique. The procedure is shown on a dataset from a model of highly faulted, thin-bedded coal layers separated by a high velocity layer of limestone. By locating the receivers above, in, and below the HVL, the reflections are expected to be recorded locally in situ in the borehole below the HVL before they travel back to the surface as in the case of surface seismic. The imaging results obtained from the model …
Updated Geochemical And Geothermometry Study On Ömer-Gecek Geothermal Area (Afyonkarahisar/Turkey), Can Başaran, Yusuf Ulutürk, Ahmet Yildiz
Updated Geochemical And Geothermometry Study On Ömer-Gecek Geothermal Area (Afyonkarahisar/Turkey), Can Başaran, Yusuf Ulutürk, Ahmet Yildiz
Turkish Journal of Earth Sciences
The Ömer-Gecek region, one of the most critical geothermal areas of Afyonkarahisar, together with Western Anatolia, serves as a model for the integrated use of geothermal waters. As a result of the analysis made on the samples collected from the newly drilled wells, the chemical composition of the Ömer-Gecek geothermal waters, with a max temperature of 125 °C, has been determined as Na-Cl. The primary hydrochemical process affecting the chemical composition is silicate weathering. All the applied geothermometer methods showed that the water's maximum reservoir temperature was 120-130 °C. The calcite, dolomite, and aragonite minerals tend to precipitate. When compared …
Detrital Composition Of Triassic To Neogene Sandstones In The Sulaiman Fold-Thrust Belt, Pakistan: Implications For Pre- And Postcollisional Evolution Of The Northwestern Indian Margin, Shazia Fareed, Akhtar Kassi, Aimal Kasi, Namik Aysal
Detrital Composition Of Triassic To Neogene Sandstones In The Sulaiman Fold-Thrust Belt, Pakistan: Implications For Pre- And Postcollisional Evolution Of The Northwestern Indian Margin, Shazia Fareed, Akhtar Kassi, Aimal Kasi, Namik Aysal
Turkish Journal of Earth Sciences
Sandstones of the Triassic through Pliocene successions of the western Sulaiman Fold-Thrust Belt (SFTB), Pakistan, were studied, by polarizing microscope and using point-counting techniques, to determine systematic variations in detrital modes. The sandstones in the study area are categorized into pre- and postcollisional sandstone assemblages. The precollisional assemblage was deposited before the onset of collision of India with Eurasia (starting Late Cretaceous-Early Paleocene) and subcategorized as Wulgai- Mughal Kot, Bibai and Pab subassemblages. The postcollisional assemblage was deposited after the onset of collision and categorized as Ghazij and Urak subassemblages. The Wulgai-Mughal Kot subassemblage mostly comprises of highly quartzose sandstones …
Relative Tectonic Activity Assessment Of Kütahya Graben (Western Anatolia): Insights From Geomorphic Indices, Zeynep Kezer, Erman Özsayin
Relative Tectonic Activity Assessment Of Kütahya Graben (Western Anatolia): Insights From Geomorphic Indices, Zeynep Kezer, Erman Özsayin
Turkish Journal of Earth Sciences
Western Anatolia is known as one of the most seismically active regions in the world, consistent with earthquakes having a magnitude >6.0. The deformation in the region is predominantly controlled by normal faults, which play significant role on the morphological features as well as depositional processes in related grabens. WNW-trending Kütahya Graben is located at the northeastern part of this province and bounded by several N- and S-dipping active normal fault segments. This study aims to investigate the relative tectonic activity among the fault segments of the Kütahya Graben using geomorphic indices. The analyses of this study include mountain-front sinuosity …
Holocene Sedimentary History Of South Danamandıra Lake: A Peatland In West Of İstanbul, Çatalca Peninsula, Nw Turkey, Özlem Makaroğlu, Melda Küçükdemi̇rci̇, Nurgül Karlioğlu, Dursun Acar, Ali̇ Gürel, Rüya Yilmaz Dağdevi̇ren, Nuretti̇n Yakupoğlu, Asen Sabuncu, Damla Şahi̇n Altun, Mustafa Ömer Karaöz, Memet Namik Çağatay
Holocene Sedimentary History Of South Danamandıra Lake: A Peatland In West Of İstanbul, Çatalca Peninsula, Nw Turkey, Özlem Makaroğlu, Melda Küçükdemi̇rci̇, Nurgül Karlioğlu, Dursun Acar, Ali̇ Gürel, Rüya Yilmaz Dağdevi̇ren, Nuretti̇n Yakupoğlu, Asen Sabuncu, Damla Şahi̇n Altun, Mustafa Ömer Karaöz, Memet Namik Çağatay
Turkish Journal of Earth Sciences
This study investigates the sedimentological evolution of the South Danamandıra Lake (SDL) lake in Çatalca Peninsula, 70 km west of İstanbul, using Georadar data and multiproxy analyses of five sediment cores. The lake is a 1.3-m deep, endorheic freshwater peatland, heavily colonised by common reed (Phragmites sp.). The multiproxy core investigations include a lithological core description and environmental magnetism, physical properties (gamma density and magnetic susceptibility), geochemical elemental, pollen and radiocarbon dating analyses. The lithological sequence in the lake consists of an upper peat unit and a lower sand-silt-clay unit. The peat unit is characterized by lower magnetic susceptibility, density …