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Comparative Study And Dyeing Performance Of As-Synthesized Azo Heterocyclic Monomeric, Polymeric, And Commercial Disperse Dyes, Shehu Sa'ad Abdullahi, Haruna Musa, Shehu Habibu, Abdullahi Haruna Birniwa, Rania Edrees Adam Mohammad
Comparative Study And Dyeing Performance Of As-Synthesized Azo Heterocyclic Monomeric, Polymeric, And Commercial Disperse Dyes, Shehu Sa'ad Abdullahi, Haruna Musa, Shehu Habibu, Abdullahi Haruna Birniwa, Rania Edrees Adam Mohammad
Turkish Journal of Chemistry
In this study poly (4-nitrophenylazo-3-aminopyridine - formaldehyde) (PNAAP-F) and poly (4-nitroarylazo-3-chloro-6-hydroxypyridine - formaldehyde) (NAACHP-F) were synthesized via diazotization, coupling and polycondensation reactions. The structural properties of the as-synthesized dyes were acquired using Fourier-transform infrared spectroscopy (FTIR) and UV-visible absorption maxima and their color, yield, melting point, solubility, and viscosity were determined via standard methods. UV-visible and FTIR results show successful formation of the polymeric dyes due to shift of wavelength of maximum absorption (λmax) (440-490 nm, 480-540 nm) and new absorption peak at around (2780-2995 cm-1) for methylene bridge respectively. The dyes were found to be …
A Molecularly Imprinted Polymer As Solid Phase Extraction Sorbent For Ketoprofen Determination In Water And Artificial Serum Prior To Hplc, Eli̇f Gürel Özyurt, Ömer Özyurt, Yekta Arya Ölçer Altinsoy, Ahmet Emi̇n Eroğlu, Ezel Boyaci, Talal Shahwan
A Molecularly Imprinted Polymer As Solid Phase Extraction Sorbent For Ketoprofen Determination In Water And Artificial Serum Prior To Hplc, Eli̇f Gürel Özyurt, Ömer Özyurt, Yekta Arya Ölçer Altinsoy, Ahmet Emi̇n Eroğlu, Ezel Boyaci, Talal Shahwan
Turkish Journal of Chemistry
Ketoprofen (KET) is an active pharmaceutical compound that has pain relieving and antipyretic effects. Its determination in body fluids and environmental waters is important due to widespread use of the compound. In this study, a selective and reliable method has been developed for the determination of ketoprofen in water and artificial serum using molecularly imprinted polymers (MIPs) as a solid phase extraction sorbent prior to HPLC-DAD detection. The MIP was synthesized by copolymerization of methacrylic acid (MAA) and trimethylpropane trimethacrylate (TRIM) in the presence of ketoprofen as the template. For the sake of comparison, nonimprinted polymer (NIP) was also synthesized …
The Effect Of Fuel On The Physiochemical Properties Of Znfe2o4 Synthesized By Solution Combustion Method, Fahma Riyanti, Widia Purwaningrum, Nova Yuliasari, Sasmita Putri, Nabila Aprianti, Poedji Loekitowati Hariani
The Effect Of Fuel On The Physiochemical Properties Of Znfe2o4 Synthesized By Solution Combustion Method, Fahma Riyanti, Widia Purwaningrum, Nova Yuliasari, Sasmita Putri, Nabila Aprianti, Poedji Loekitowati Hariani
Turkish Journal of Chemistry
The synthesis of ZnFe2O4 nanoparticles was performed using the solution combustion method with three types of fuel, namely urea, glycine, and ethylenediamine tetra-acetic acid (EDTA) with precursors (Zn(NO3)2.6H2O and Fe(NO3)3.9H2O. The combustion process was conducted in an open space at 300 °C for ± 1 h, resulting in a brownish-black ZnFe2O4. Meanwhile, the fuel type used in the process affects the physicochemical properties of ZnFe2O4. XRD analysis showed that ZnFe2O4 synthesized using urea, glycine, …
The Sweet And Embellishing Lycium Arabicum Schweinf. Ex Boiss. Fruit Oil: A Potential Source Of Essential Ω-6 And Ω-9 Fatty Acids, Phytosterols, And Carotenoids, Jawhar Fakhfakh, Marwa Affes, Hazem Jabeur, Mohamed Ayadi, Noureddine Allouche
The Sweet And Embellishing Lycium Arabicum Schweinf. Ex Boiss. Fruit Oil: A Potential Source Of Essential Ω-6 And Ω-9 Fatty Acids, Phytosterols, And Carotenoids, Jawhar Fakhfakh, Marwa Affes, Hazem Jabeur, Mohamed Ayadi, Noureddine Allouche
Turkish Journal of Chemistry
In our current phytochemical investigation on the Tunisian plant Lycium arabicum Schweinf. ex Boiss., we attempted to explore the oil obtained from its fruits. This oil was extracted by cold maceration with ethanol and was analyzed to estimate its sterol and fatty acid content. The physicochemical parameters of the oil were also examined. They were specified in terms of acid value (0.8 ± 0.01 mg KOH g-1 oil), peroxide value (10.9 ± 0.02 meq O2 kg-1 oil), saponification value (162.97 ± 0.03 mg KOH g-1 oil), chlorophylls (1.011 ± 0.03 mg kg-1 oil) and carotenoids …
Morphological, Microstructural And Photocatalytic Characterization Of Undoped And Ni, Co Doped Fe2o3 Particles Synthesized By Sonochemical Method, Eli̇f Emi̇l Kaya, Burak Evren, Zeynep Erdöl, Duygu Eki̇nci̇, Mehmet İpekoğlu, Si̇bel Özenler
Morphological, Microstructural And Photocatalytic Characterization Of Undoped And Ni, Co Doped Fe2o3 Particles Synthesized By Sonochemical Method, Eli̇f Emi̇l Kaya, Burak Evren, Zeynep Erdöl, Duygu Eki̇nci̇, Mehmet İpekoğlu, Si̇bel Özenler
Turkish Journal of Chemistry
In this study, an abundant and eco-friendly photocatalytic material, Fe2O3 particles were synthesized by sonochemical method. Morphological and microstructural investigations of synthesized undoped and Ni, Co-doped Fe2O3 particles were performed. The effect of particle morphology and microstructure on its photocatalytic performance was further investigated. Comparative studies for evaluating particle crystallite sizes were conducted by Williamson-Hall (W-H) method and modified Debye-Scherrer (MDS). Crystallite sizes and lattice strains of Fe2O3 induced by process parameters were calculated by W-H method based on uniform deformation model (UDM). The crystallite sizes of the synthesized powders were …
Single-Side Polypyrrole Coated Conductive And Flexible Polyurethane Films, Meli̇s Bi̇lal, Esma Sezer, Belkis Ustamehmetoglu
Single-Side Polypyrrole Coated Conductive And Flexible Polyurethane Films, Meli̇s Bi̇lal, Esma Sezer, Belkis Ustamehmetoglu
Turkish Journal of Chemistry
In this study, single-side polypyrrole (PPy) coated conductive stretchable polyurethane (PU) / PPy composite films were synthesized by chemical oxidative method in the acetonitrile (ACN)/H2O interface as a new alternative to two-side coated PU films which have already reported in the literature. One surface of the PU film was contacted with aqueous Py solution and the other surface with cerium ammonium nitrate (CAN) solution in ACN, so that only one surface of the film was coated with PPy and the resulting composite was named PU/PPy (PUP). This composite was characterized by four-point probe conductivity measurement, Fouriertransform infrared spectroscopy …
Study On Moo3/Sba-16 Catalyzed Transesterification To Synthesize Diphenyl Carbonate, Ying Li, Shunwu He
Study On Moo3/Sba-16 Catalyzed Transesterification To Synthesize Diphenyl Carbonate, Ying Li, Shunwu He
Turkish Journal of Chemistry
In this paper, the mesoporous molecular sieve SBA-16 with good dispersion was prepared by hydrothermal method. Under the condition of Si/Mo= 1.0, MoO3/SBA-16 catalysts were prepared by iso-dipping method at 550 °C, 650 °C and 750 °C calcination temperature, which for the synthesis of diphenyl carbonate (DPC) from dimethyl carbonate (DMC) and phenyl acetate (PA) was used, and the uncalcined MoO3/SBA-16 was used as a reference. XRD, TG-DTA, XPS, ICP-MS, FT-IR, BET, SEM and TEM characterization. The effects of calcination temperature and reaction conditions on the catalytic performance of MoO3/SBA-16 in transesterification of DMC and PA …
Preparation And Characterisation Of Ethambutol With Β-Cyclodextrin: A Comprehensive Molecular Insight Into Host-Guest Interaction, Soen Qeng Goh, Qiao Hui Chan, Rohana Adnan, Nurul Yani Rahim
Preparation And Characterisation Of Ethambutol With Β-Cyclodextrin: A Comprehensive Molecular Insight Into Host-Guest Interaction, Soen Qeng Goh, Qiao Hui Chan, Rohana Adnan, Nurul Yani Rahim
Turkish Journal of Chemistry
The increase in new cases of drug resistance to first-line drugs such as ethambutol (ETB) makes it necessary to develop improvements for antituberculosis drugs. A new method for improving the bioavailability of active pharmaceutical ingredient (API) was investigated for preventing drug resistance and side-effects of antituberculosis drugs. In this study, an antituberculosis drug delivery system using β-cyclodextrin (β-CD) as the supramolecular carrier of ETB was prepared using the kneading method. The inclusion behaviour of β-CD/ETB inclusion complex in solid and liquid state was investigated. The inclusion complex was characterized using Fourier transform infrared spectroscopy, thermogravimetric analysis, nuclear magnetic resonance (NMR) …
Adsorptive Removal Of Crystal Violet From Aqueous Solution By Ultrasonic-Assisted Synthesized Zirconium-2,6-Naphthalenedicarboxylate Metal-Organic Framework, Penmethsa Kiran Kumar, Sunkara Satya Veni
Adsorptive Removal Of Crystal Violet From Aqueous Solution By Ultrasonic-Assisted Synthesized Zirconium-2,6-Naphthalenedicarboxylate Metal-Organic Framework, Penmethsa Kiran Kumar, Sunkara Satya Veni
Turkish Journal of Chemistry
Zirconium-2,6-naphthalenedicarboxylate metal-organic framework (Zr-NDC MOF) was prepared using ultrasound-assisted synthesis and tested for the adsorptive removal of crystal violet (CV) dye from aqueous solution. The pristine Zr-NDC was characterized using powder X-ray diffraction, scanning electron microscopy, thermogravimetric analysis, and energy-dispersive X-ray spectroscopy, Fourier-transform infrared, elemental analysis, and dynamic light scattering techniques. The maximum percentage removal of CV dye was found to be 99.45% with an initial dye concentration of 10 mg L-1. The kinetics and adsorption isotherm models were used to investigate the removal of CV dye from aqueous solution using Zr-NDC. Langmuir adsorption isotherm model (R2 …
Synthesis, Characterization, And Antimicrobial Evaluation Of Polyvinylalcohol-Osthol Composite Films, Ishrat Gowsia, Feroz Mir, Javid Banday
Synthesis, Characterization, And Antimicrobial Evaluation Of Polyvinylalcohol-Osthol Composite Films, Ishrat Gowsia, Feroz Mir, Javid Banday
Turkish Journal of Chemistry
Although poly-vinyl alcohol (PVA) has certain mechanical drawbacks such as a weak barrier, it has widely been used in food packaging over the last many years. To increase the suitability of PVA (C2H4O)n and render it ideal for food packaging, a diversity of studies have already been carried out. In the below-mentioned script, we, for the first time, report the use of natural product osthol in making a new composite with PVA for enhancing thermal, physicochemical, and antimicrobial properties. The significant aim of the report is the insertion of osthol (C15H16O3 …
Chromatographic Profile Of Major Whey Proteins In Some Dairy Beverages Based On Milk Serum, Doina Prodan, Miuta Filip, Mihaela Vlassa, Marioara Moldovan, Rahela Carpa
Chromatographic Profile Of Major Whey Proteins In Some Dairy Beverages Based On Milk Serum, Doina Prodan, Miuta Filip, Mihaela Vlassa, Marioara Moldovan, Rahela Carpa
Turkish Journal of Chemistry
The aim of this study was the determination of chromatographic profiles of major whey proteins (WP): α-lactalbumin (α-La), β-lactoglobulin A and B, (β-Lg A and B), bovine serum albumin (BSA) in dairy beverages based on Zonar milk serum. The studied WP were separated by high-performance liquid chromatography (HPLC) on Aeris XB-C18 column using gradient elution with 0.1% trifluoroacetic acid (TFA) in water and 0.1% TFA in 80% acetonitrile, at 214 nm detection. The HPLC method was validated for system suitability, selectivity/specificity, linearity (R2 ≥ 0.996), precision (RSD% ≤ 2.01), trueness (recovery 96.29%-102.08%), sensitivity (limits of quantification (LOQ) 1.35-10.08 μg/mL), …
Miscibility And Thermal Behavior Of Poly(Methyl Methacrylate) And Polystyrene Blend Using Benzene As A Common Solvent, Arshiya Iqbal, Jamil Muhammad, Farzana Ahmad, Mohsan Nawaz, Musa Kaleem Baloch, Luqman Mohammad
Miscibility And Thermal Behavior Of Poly(Methyl Methacrylate) And Polystyrene Blend Using Benzene As A Common Solvent, Arshiya Iqbal, Jamil Muhammad, Farzana Ahmad, Mohsan Nawaz, Musa Kaleem Baloch, Luqman Mohammad
Turkish Journal of Chemistry
Polymer blending is one of the advanced technologies to attain polymeric material with tailored properties. In this work, the miscibility of Poly(methyl methacrylate) (PMMA) and Polystyrene (PS) blend in benzene was investigated by employing various techniques such as FTIR spectroscopy, viscosity measurement technique, light scattering techniques, DSC and TGA techniques over an extended range of concentrations, compositions, and temperatures. The results revealed that there exist hydrogen bonding and hydrodynamic interactions which led these polymers to get miscible to a large extent. The compatibility increased with the increasing PS contents or increase in temperature of the system. In addition, the thermal …
Polyvinyl Alcohol-Citrate-Stabilized Silver Nanoparticles As An Optical Sensor For Selective Colorimetric Determination Of Sildenafil, Asi̇ye Aslihan Avan
Polyvinyl Alcohol-Citrate-Stabilized Silver Nanoparticles As An Optical Sensor For Selective Colorimetric Determination Of Sildenafil, Asi̇ye Aslihan Avan
Turkish Journal of Chemistry
A facile and sensitive colorimetric detection method for sildenafil citrate (SLDC) has been developed by using polyvinyl alcohol-citrate-stabilized silver nanoparticles (PVA-Cit-AgNPs). The sensitivity and selectivity of colorimetric detection were investigated in detail. The PVA-Cit-AgNPs could be induced to aggregate immediately in the presence of SLDC, especially after the addition of 0.1 M HCl solution. The SLD could be detected by the colorimetric response of AgNPs that could be monitored by a UV-Vis spectrophotometer or even the naked eye. The linear range was found to be 0.6-5.0 μM with the calculated detection limit of 0.1 μM and the naked-eye detection limit …
Encapsulation Of Halocadmate Anion Via Hydrogen Bonding: Synthesis And Characterization Of Bis(Diethylenetriamine)Cobalt(Iii) Complex Containing Hexabromocadmate Anion, Vinit Prakash, Ritu Bala, Amrinder Kaur, Daron E. Janzen
Encapsulation Of Halocadmate Anion Via Hydrogen Bonding: Synthesis And Characterization Of Bis(Diethylenetriamine)Cobalt(Iii) Complex Containing Hexabromocadmate Anion, Vinit Prakash, Ritu Bala, Amrinder Kaur, Daron E. Janzen
Turkish Journal of Chemistry
In this work, the encapsulation of [CdBr6]4- by six cations, [Co(dien)2]3+ has been described with the help of single crystal X-ray structural study in the complex, mer-[Co(dien)2]2[CdBr6]Br2. The complex anion, [CdBr6]4- has been obtained through solution method while attempting to synthesize complex dianion, [CdBr4]2-. This newly synthesized complex has been initially characterized by elemental analyses and spectroscopic studies (IR, NMR and UV-Visible). IR and NMR studies have been used for the isomeric identification of [Co(dien)2]3+ …
Degradation Of Dye Containing In Textile Wastewater By Sequential Process: Photocatalytic And Biological Treatment, Jose Carlos Mendoza Hernandez, Gabriela Perez Osorio, Jose Eligio Moises Gutierrez Arias, Josefina Castañeda Camacho
Degradation Of Dye Containing In Textile Wastewater By Sequential Process: Photocatalytic And Biological Treatment, Jose Carlos Mendoza Hernandez, Gabriela Perez Osorio, Jose Eligio Moises Gutierrez Arias, Josefina Castañeda Camacho
Turkish Journal of Chemistry
In this research, a combined photocatalytic and biological treatment is proposed for the elimination of pollutants present in textile wastewater using a natural erionite zeolite (PE) and aluminum oxide (PA) synthesized by the sol-gel method as photocatalysts, and solar radiation. Both catalysts were characterized by XRD, SEM, and EDS. For biological treatment two bacterial consortium were used: BC1 (Escherichia coli N16, Serratia k120, Pseudomonas putida B03 and Enterobacter hormaechei), and consortium BC2 (Escherichia coli N16, Serratia Mc107, Enterobacter N9, Enterobacter hormaechei Mc9). The photocatalytic and microbiological treatments were carried out initially separately and subsequently in a …
Kinetic, Isotherm, And Thermodynamic Studies For Adsorptive Removal Of Basic Violet 14 From Aqueous Solution, Yasemi̇n Tamer, Hale Berber
Kinetic, Isotherm, And Thermodynamic Studies For Adsorptive Removal Of Basic Violet 14 From Aqueous Solution, Yasemi̇n Tamer, Hale Berber
Turkish Journal of Chemistry
In this study, the performance of chitosan based semi-IPN nanocomposite hydrogels for the adsorptive removal of basic violet 14 (BV14) from aqueous solution has been explored. Batch adsorption studies were conducted to determine the effect of various parameters on BV14 adsorption, and optimum values were reported as pH of 8, the adsorbent dosage of 0.025 g, initial BV14 concentration of 5 mg L-1 and contact time of 90 min at a temperature of 25 °C. The semi-IPN hydrogel containing 0.5% by weight GO showed the improved adsorption capacity for BV14 compared to the neat hydrogel adsorbent, and the maximum …
Quaternarization And Polymerization Of 2-Chloroethyl Maleate Derivative Of Epoxidized Soybean Oil, Demet Gürbüz
Quaternarization And Polymerization Of 2-Chloroethyl Maleate Derivative Of Epoxidized Soybean Oil, Demet Gürbüz
Turkish Journal of Chemistry
As a potent antibacterial, antifungal or antiviral material, synthesis of quaternarized epoxidized soybean oil was demonstrated in this work. The first step of the synthesis is the reaction of epoxidized soybean oil (ESO) with 2-chloroethyl maleic acid (Cl-MA-ESO). The last step is quaternarization of this condensate with triethylamine (Q-MA-ESO). All the synthesized monomers were characterized by FTIR and 1H NMR techniques. Homopolymer of the quaternarized derivative (Q-MA-ESO) was not obtained. However, styrene copolymers were obtained and characterized. Thermal properties of the copolymers were determined by TGA and DSC techniques. Additionally, swelling properties of the materials were also evaluated. The …
Removal Of Polycyclic Aromatic Hydrocarbons (Pahs) From Water Through Degradable Polycaprolactone Electrospun Membrane, Fuat Topuz
Turkish Journal of Chemistry
Polycyclic aromatic hydrocarbons (PAHs) are common and persistent environmental pollutants produced during the incomplete combustion of fuels. They are known for their carcinogenic and mutagenic properties. Thus, their removal from water bodies is highly crucial and has become a critical issue globally. As a solution, here an electrospun polycaprolactone (PCL) membrane with a mean fiber diameter of 2.74 ± 1.3 μm was produced by electrospinning. Water contact angle (WCA) analysis confirmed the hydrophobic nature of the PCL membrane with a WCA of 124°, which remained stable over time. Differential scanning calorimetry analysis (DSC) revealed the semicrystalline nature of the membrane …
The Relation Between Surface Acidity And Moo3:Al2o3 Ratio On The Ternary Mixed Oxide Catalysts For The Conversion Of Propan-2-Ol, Hani Zeidan, Ebru Erünal, Mustafa Esen Marti
The Relation Between Surface Acidity And Moo3:Al2o3 Ratio On The Ternary Mixed Oxide Catalysts For The Conversion Of Propan-2-Ol, Hani Zeidan, Ebru Erünal, Mustafa Esen Marti
Turkish Journal of Chemistry
In this study, ternary mixed oxide catalysts containing Al2O3-MoO3-MgO and Al2O3-MoO3-WO3 were prepared with a changing ratio of MoO3:Al2O3 between 0.05 and 20.00. All catalysts showed 100% selectivity towards propene during the conversion of propan-2-ol at temperatures between 220 and 400 °C. The catalysts prepared from WO3 possessed very strong acid sites, which cause higher catalytic activity than catalysts prepared from MgO. Besides, the ratio of MoO3:Al2O3 was found to be directly proportional to the conversion …
Investigation Of Glycerol Electrooxidation Activity Of Carbon Supported Pdcu Bimetallic Electrocatalyst, Kübranur Ağtoprak, Merve Doğan Özcan, Ayşe Ni̇lgün Akin, Rami̇z Gülteki̇n Akay
Investigation Of Glycerol Electrooxidation Activity Of Carbon Supported Pdcu Bimetallic Electrocatalyst, Kübranur Ağtoprak, Merve Doğan Özcan, Ayşe Ni̇lgün Akin, Rami̇z Gülteki̇n Akay
Turkish Journal of Chemistry
In this study, Pd/C, Cu/C, and a series of PdCu/C bimetallic electrocatalysts were prepared by microwave-assisted modified polyol method to determine glycerol electrooxidation reaction (GOR) activities. The effect of microwave duration on catalyst structure and GOR activity was investigated on PdCu/C bimetallic catalysts. Also, a commercial Pd/C (com-Pd/C) was used to compare catalytic activities with prepared samples. Electrocatalysts were characterized by using X-ray Diffraction (XRD), Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES), and Transmission Electron Microscopy (TEM) analyses. In addition, the activity and stability of electrocatalysts for GOR were examined by using cyclic voltammetry (CV) and chronoamperometry (CA). In XRD …
Determination Of Si/Graphite Anode Composition For New Generation Li-Ion Batteries: A Case Study, İlknur Kalafat, Nesli̇han Yuca
Determination Of Si/Graphite Anode Composition For New Generation Li-Ion Batteries: A Case Study, İlknur Kalafat, Nesli̇han Yuca
Turkish Journal of Chemistry
Silicon with the properties of high capacity capability, moderate working potential, environmental sensitivity, and existence are the highly promising anode materials for lithium-ion batteries. Silicon anodes have disadvantageous properties and advantages like 300% volume change during lithium insertion and extraction process that can result in capacity fading and a shorter lifetime of the battery. In the literature, different optimizations of Silicon with different nanomaterials or composite materials, in different ratios, and with different binders and different procedures have been studied. The physical mixing of silicon with carbon provides a good performance by combining the high lithium storage capacity of the …
Gold Nanoparticles/Over-Oxidized Poly-Eriochrome Black T Film Modified Electrode For Determination Of Arsenic, Mürşi̇de Ceren Afşar, Aydan Elçi̇, Zekerya Dursun
Gold Nanoparticles/Over-Oxidized Poly-Eriochrome Black T Film Modified Electrode For Determination Of Arsenic, Mürşi̇de Ceren Afşar, Aydan Elçi̇, Zekerya Dursun
Turkish Journal of Chemistry
A glassy carbon electrode, modified with gold nanoparticles/over-oxidized poly-eriochrome black T film, was fabricated for sensitive determination of As(III) by stripping voltammetry in an acidic medium. The electrode surface properties were characterized by cyclic voltammetry, electrochemical impedance spectroscopy, scanning electron microscope (SEM), and X-ray photoelectron spectroscopy (XPS). The electrode demonstrated a good response towards As(III), with a detection of 0.077 μM and good linearity in the range of 0.1 to 10 μM (R2 = 0.9977). For the determination of As(III), the fabricated electrode was placed in different mineral water samples, acidified with 0.75 M HCl solution, spiked with various …
Improving Collaborative Recommendation Based On Item Weight Link Prediction, Sahraoui Kharroubi, Youcef Dahmani, Omar Nouali
Improving Collaborative Recommendation Based On Item Weight Link Prediction, Sahraoui Kharroubi, Youcef Dahmani, Omar Nouali
Turkish Journal of Electrical Engineering and Computer Sciences
There is a continuous information overload on the Web. The problem treated is how to have relevant items (documents, products, services, etc.) at time and without difficulty. Filtering system also called recommender systems are widely used to recommend items to users by similarity process such as Amazon, MovieLens, Cdnow, etc. In the literature, to predict a link in a bipartite network, most methods are based either on a binary history (like, dislike) or on the common neighbourhood of the active user. In this paper, we modelled the recommender system by a weighted bipartite network. The bipartite topology offers a bidirectional …
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 …
Shear Wave Velocity Estimation Based On The Particle Swarm Optimization Method Of Hvsr Curve Inversion In Bakauheni District, Indonesia, Ahmad Zaenudin, I Gede Boy Darmawan, Alhada Farduwin, Rahmat Catur Wibowo
Shear Wave Velocity Estimation Based On The Particle Swarm Optimization Method Of Hvsr Curve Inversion In Bakauheni District, Indonesia, Ahmad Zaenudin, I Gede Boy Darmawan, Alhada Farduwin, Rahmat Catur Wibowo
Turkish Journal of Earth Sciences
The Nakamura method, known as horizontal to vertical spectral ratio (HVSR), has been used to analyze site effect assessment. Over the past decade, various HVSR curve inversion methods for near-surface geophysical surveys have been developed. Particle swarm optimization (PSO) inversion method has been applied to solve the HVSR inversion curve to estimate the shear wave velocity (Vs) value towards the depth. In this study, the HVSR curve inversion experiment has been applied with two synthetic data: noise-free data and the other is contaminated by 10% random noise. This research aims to find out how the PSO algorithm performs to find …
Mineralogical And Geochemical Signatures Of Weathering On Carbonate Rocks And Dynamic Young Land Surfaces In Muğla Polje (Sw Turkey), Ceren Küçükuysal, Murat Gül, Tural Aghayev, Merve Gülcan
Mineralogical And Geochemical Signatures Of Weathering On Carbonate Rocks And Dynamic Young Land Surfaces In Muğla Polje (Sw Turkey), Ceren Küçükuysal, Murat Gül, Tural Aghayev, Merve Gülcan
Turkish Journal of Earth Sciences
Red soils as the weathering products in Muğla Polje (SW Turkey) show different occurrences either on hard and permeable limestone (terra rossa (TRs)) or within the matrix of transported sediments (alluvium-derived soils (ALs), alluvium-derived soils specifically from clastics (ALsc), paleosol (Pls), and colluvium-derived soils (CLs)). The purpose of this study is to unlock the effect of weathering on hard carbonate rocks and dynamic young land surfaces (alluvium and colluvium) in Muğla Polje for the first time in terms of mineralogical and geochemical compositions. TRs, the soils of more stable environments are clayey while ALs and CLs as being the soils …
A Case Study On Geomorphology: Tree-Ring-Based Confirmation Of The Formation Year Of Lake Kaindy After The 1911 Kemin Earthquake In Almaty (Kazakhstan), Ünal Akkemi̇k, Kuralay Mazarzhanova, Arailym Kopabayeva
A Case Study On Geomorphology: Tree-Ring-Based Confirmation Of The Formation Year Of Lake Kaindy After The 1911 Kemin Earthquake In Almaty (Kazakhstan), Ünal Akkemi̇k, Kuralay Mazarzhanova, Arailym Kopabayeva
Turkish Journal of Earth Sciences
Lake Kaindy, which is located in the Kazakhstan side of the Tien Shan Mountains is one of the most famous places in the World due to having sunken Picea schrenkiana Fisch. & C.A.Mey. trees within the Lake. The purpose of the study is to find the dead years of the sunken trees in the lake and therefore to confirm the formation time of Kaindy Lake, and if there is an effect of the 1911 Kemin earthquake on the tree-ring width of Picea schrenkiana around the lake. Eight wood pieces and two increment cores from the sunken trees were taken to …
Effects Of Some Commercial Products On Root And Crown Rot Caused By Phytophthora Cactorum In Apple Cultivation, Suat Kaymak
Effects Of Some Commercial Products On Root And Crown Rot Caused By Phytophthora Cactorum In Apple Cultivation, Suat Kaymak
Turkish Journal of Agriculture and Forestry
Root and crown rot caused by Phytophthora cactorum (Lebert & John) Schroeter is one of the most common diseases of apple (Malus domestica) in the world. Due to the negative influences of fungicides on the environment, using other applicable control measures is a plausible way for the management of the disease. The objective of the study was to evaluate the effects of eleven commercial products (bio-pesticides, fertilizers, and activators) on P. cactorum by comparing plant growth parameters (trunk diameter, plant height, number of branches, and root dry weight). Trials were conducted according to a randomized complete block design with three …
Assessment Of Safflower Genotypes For Individual And Combined Effects Of Drought And Salinity Stress At Early Seedling Growth Stages, Fatma Kayaçeti̇n
Assessment Of Safflower Genotypes For Individual And Combined Effects Of Drought And Salinity Stress At Early Seedling Growth Stages, Fatma Kayaçeti̇n
Turkish Journal of Agriculture and Forestry
Safflower is a highly valued oilseed crop. Safflower oil is a source of monounsaturated and polyunsaturated fatty acids which are important for a plurality of industries including the edible vegetable oil industry. Safflower is highly resistant to salinity and drought stress, which impede seed germination. Two safflower cultivars and 4 lines were screened against nine levels of osmotic stress treatments (using NaCl0 and PEG 60000 (control), NaCl-0.2, NaCl-0.4, PEG 6000-0.2, PEG 6000-0.4, PEG 6000-0.2+NaCl-0.2, PEG 6000-0.2+NaCl-0.4, PEG 6000-0.4+NaCl-0.2, PEG 6000-0.4+NaCl-0.4 MPa) for 8 days at seed germination stage. The osmotic stress was observed to induce a negative effect on the …
A Simple Dual-Band Quasi-Yagi Antenna With Defected Ground Structures, Göksel Turan, Hayretti̇n Odabaşi
A Simple Dual-Band Quasi-Yagi Antenna With Defected Ground Structures, Göksel Turan, Hayretti̇n Odabaşi
Turkish Journal of Electrical Engineering and Computer Sciences
In this article, a dual-band compact quasi-Yagi antenna with defected ground structure (DGS) is proposed. The proposed antenna has a simple feeding mechanism consists of a microstrip and transmission line. Half of the driver and director elements are printed on the opposite side of the substrate to ensure good coupling between the antenna elements and achieve a stable radiation pattern. The ground plane is modified with one rectangular slot below the microstrip line to form dual-band operation. Also rectangular slots placed on the sides of the ground plane to improve the matching. The proposed antenna works at $f_{1}=3.35$ and $f_{2}=6.15$ …