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Articles 301 - 330 of 10730
Full-Text Articles in Physical Sciences and Mathematics
Removal Of Ddt, Ddd, And Dde From Washing Extracts Of Contaminated Soil Using Polyaniline/Bagasse Composite Material, Hop Quang Nguyen, Bach Xuan Nguyen, Thien Quang Tran, Anh Van Nguyen
Removal Of Ddt, Ddd, And Dde From Washing Extracts Of Contaminated Soil Using Polyaniline/Bagasse Composite Material, Hop Quang Nguyen, Bach Xuan Nguyen, Thien Quang Tran, Anh Van Nguyen
Turkish Journal of Chemistry
Polyaniline (PANi) was hybridized with a bagasse (BG) substrate to treat Dichlorodiphenyltrichloroethane (DDT), dichlorodiphenyldichloroethylene (DDE), and dichlorodiphenyldichloroethane compounds, which are persistent organic pollutants (POPs) causing environmental contamination. The PANi/bagasse (PA/BG) composite was synthesized using ammonium persulfate and sulfuric acid, achieving efficiencies ranging from 82.63% to 86.92% with different ratios of PANi monomer to BG. Infrared spectroscopy (IR) and scanning electron microscopy (SEM) were used to characterize the synthesized materials. The adsorption capacities of DDT, DDD, and DDE compounds were investigated under various conditions, including adsorbent type, adsorption time, adsorbent dosage, and adsorbate concentration. Both Langmuir and Freundlich isotherm models were …
1,3,4-Thiadiazole Derivatives As Pi3ks Inhibitor: Design, In Silico Studies, Synthesis, Characterization, And Antimicrobial Evaluation, Dharmvir Singh, Pankaj Kumar, Anoop Kumar, Vivek V. Bhosale, Kalicharan Sharma, Deepak Kumar, Ramchander Khatri, Tanuj Hooda, Amit Lather
1,3,4-Thiadiazole Derivatives As Pi3ks Inhibitor: Design, In Silico Studies, Synthesis, Characterization, And Antimicrobial Evaluation, Dharmvir Singh, Pankaj Kumar, Anoop Kumar, Vivek V. Bhosale, Kalicharan Sharma, Deepak Kumar, Ramchander Khatri, Tanuj Hooda, Amit Lather
Turkish Journal of Chemistry
Since PI3Ks are targeted by a variety of bacterial pathogens, they represent a promising target for host-directed immune therapy and may be beneficial in managing persistent bacterial infections. In the present study, computational studies of 5-(pyridin-4-yl)-1,3,4-thiadiazol-2-amine derivatives for phosphoinositide-3-kinases (PI3Ks) inhibitors were carried out using dock scores, Glide scores, and the MMGBSA dG method, with comparison to standard drugs (ofloxacin and fluconazole). A series of 5-(pyridin-4-yl)-1,3,4-thiadiazol-2-amine derivatives (D1-D17) were synthesized and evaluated for their in vitro antimicrobial activity against both gram-positive and gram-negative bacterial strains, as well as fungal strains, using the tube dilution method. The synthesized compounds were characterized …
Dispersive Micro Solid Phase Extraction Of Cadmium On Mil-53(Al)@Batio3 Nanocomposite From Seafood Samples, Mustafa Soylak, Eda Bora, Furkan Uzcan
Dispersive Micro Solid Phase Extraction Of Cadmium On Mil-53(Al)@Batio3 Nanocomposite From Seafood Samples, Mustafa Soylak, Eda Bora, Furkan Uzcan
Turkish Journal of Chemistry
This study’s main goal was to produce a user-friendly dispersive micro solid phase extraction (dmSPE) technique with a MIL-53(Al)@BaTiO3 nanocomposite for the extraction and preconcentration of cadmium (Cd) in various seafood matrices, followed by using high-resolution continuum source flame atomic absorption spectrometry (HR-CS-FAAS). The MIL-53(Al)@BaTiO3 nanocomposite was synthesized and characterized using a range of techniques, including Fourier-transform infrared spectroscopy, field emission scanning electron microscopy, scanning transmission electron microscopy, X-ray diffraction, and Brunauer-Emmett-Teller analysis. The dmSPE technique involved the dispersion of the MIL-53(Al)@BaTiO3 material in the sample solution, followed by its separation from the sample matrix. The optimized method exhibited a …
Pt-Enhanced Wo3 Nanoparticles For Efficient Hydrogen Production: Synthesis And Electrochemical Evaluation, Merve Akbayrak
Pt-Enhanced Wo3 Nanoparticles For Efficient Hydrogen Production: Synthesis And Electrochemical Evaluation, Merve Akbayrak
Turkish Journal of Chemistry
In this study, Pt/WO3 nanoparticles were synthesized using a simple room-temperature impregnation-reduction method and characterized by advanced techniques including ICP, TEM-EDX, FE-SEM-EDX, and XRD. The ICP-OES analysis confirmed a 1.0 wt. %Pt loading on the WO3 support. TEM and FE-SEM analyses revealed that the Pt nanoparticles were well dispersed with an average size of approximately 3.7 nm. The XRD patterns showed characteristic WO3 peaks without any detectable Pt diffraction peaks, indicating the high dispersion of Pt. Electrochemical evaluations demonstrated that the Pt/WO3 catalyst exhibited outstanding hydrogen evolution reaction (HER) performance, with –27.8 mV vs. RHE onset potential and –37.4 mV …
A Single Batch Synthesis Of Pure Phase Mo2c From Ammonium Molybdate: Pathway And Properties, Melek Cumbul Altay
A Single Batch Synthesis Of Pure Phase Mo2c From Ammonium Molybdate: Pathway And Properties, Melek Cumbul Altay
Turkish Journal of Chemistry
This study presents an original, effective, and environmentally friendly method for synthesizing pure molybdenum carbide (Mo2C) from ammonium molybdate tetrahydrate (AMT) without generating carbon dioxide, a greenhouse gas. The process involves the sequential transformation of AMT to Mo2C, which follows the reaction pathway of (NH4)6Mo7O24→MoO3→MoO2→Mo→Mo2C. This transformation is achieved by strategically altering the gas atmosphere, switching from Ar to H2 at 800 K and then from H2 to CH4 at 1000 K. Thermal analysis, X-ray diffraction (XRD), and scanning electron microscopy (SEM) techniques were used to characterize AMT and the products. Mass measurements were used to follow the conversion of …
Determination Of P53 Biomarker With A Smart Electrochemical Biosensor Based On Brush Polymer-Functionalized Disposable Electrode, Muhammet Aydin
Determination Of P53 Biomarker With A Smart Electrochemical Biosensor Based On Brush Polymer-Functionalized Disposable Electrode, Muhammet Aydin
Turkish Journal of Chemistry
A label-less impedimetric biosensor modified with poly(thiophene)-graft-poly(glycidyl methacrylate) polymer (PThi-g-PGM) was manufactured for p53 protein quantification in human serum samples. In this study, PThi-g-PGM polymer was synthesized, and this polymer matrix was coated using the spin-coating technique on the single-use indium tin oxide (ITO) substrate for anti-p53 antibody immobilization. The anti-p53 antibodies with high affinity for p53 proteins were covalently attached onto the PThi-g-PGM-coated electrode surface. In addition, the affinity of anti-p53 for the p53 protein was monitored at a constant frequency. Under optimized conditions, the impedimetric changes were linearly related to the p53 concentrations, ranging from 0.05 to 15 …
Highly Sensitive And Selective Detection Of Klk4 In Human Serum With A Low-Cost Electrochemical Biosensor, Eli̇f Burcu Aydin
Highly Sensitive And Selective Detection Of Klk4 In Human Serum With A Low-Cost Electrochemical Biosensor, Eli̇f Burcu Aydin
Turkish Journal of Chemistry
An ultrasensitive impedimetric immunosensor was fabricated using a poly(glycidyl methacrylate) (PGMA) polymer-covered indium tin oxide (ITO) platform for the quantification of kallikrein 4 (KLK4), an important prostate cancer biomarker. PGMA had suitable biocompatibility and nontoxicity for loading of antiKLK4 antibodies on the ITO substrate surface. Anti-KLK4 biomolecules were directly attached to the PGMA-covered electrode surface via epoxy groups of the PGMA polymer. The preparation method for the PGMA matrix-modified electrode was simple and inexpensive. The proposed biosensor immobilization layers coated on the ITO electrode were characterized with electrochemical techniques. The experimental parameters that affect biosensor response were optimized, and the …
Soil Geochemistry Characteristics Of Bimodal-Mafic Type Vms Deposits In The Central Pontides: Importance Of Data Investigation In Exploration And Following Discovery, Buğra Çavdar, Kurtuluş Günay
Soil Geochemistry Characteristics Of Bimodal-Mafic Type Vms Deposits In The Central Pontides: Importance Of Data Investigation In Exploration And Following Discovery, Buğra Çavdar, Kurtuluş Günay
Turkish Journal of Earth Sciences
Çangaldağ Metamorphic Complex is defined with low grade metamorphic equivalents of mafic to felsic intrusive and extrusives, clastics and volcanoclastics. The Au-Cu-Zn Say Yayla (deeply-seated; West Zone) and the Au-dominant Büyük Hill (gossan related; East Zone) deposits are classified as bimodal-mafic type VMS in that complex and they are hosted in the metafelsic ensimatic arc volcanics. These were investigated by soil samples developed over each mineralization to examine the soil characteristics with different textural features. A total of 274 soil samples were collected and they have been geochemically analysed and examined using various statistical methods. The results reveal that both …
Integrated Geochemical, Geoelectrical, And Uav-Based Methods For Analyzing The Güzelyalı Landslide (Çanakkale, Türkiye), Oya Erenoğlu, Emi̇n Ulugergerli̇, R. Cüneyt Erenoğlu, Abdullah Akbaş, Ahmet Evren Ergi̇nal
Integrated Geochemical, Geoelectrical, And Uav-Based Methods For Analyzing The Güzelyalı Landslide (Çanakkale, Türkiye), Oya Erenoğlu, Emi̇n Ulugergerli̇, R. Cüneyt Erenoğlu, Abdullah Akbaş, Ahmet Evren Ergi̇nal
Turkish Journal of Earth Sciences
The number of reactivations increased in the Güzelyalı-Erenköy landslide area after 2013 in Çanakkale, Türkiye, where historical landslide activity has been recorded since 1875. This area is home to numerous summer residences and experiences ongoing slow-moving landslide activity along a 400-m-long slope, extending from the heavily trafficked Çanakkale-İzmir highway to the coastline. In this study, the nature of the reactivations was evaluated by considering the conditioning and triggering factors that contributed to the landslide. The evaluation was based on geochemical analyses, field observations, geoelectric measurements, and unmanned aerial vehicle (UAV) data. The results revealed that the sliding occurred along a …
Apatite Chemistry From The Xv Ioa Deposit, The Bafq–Saqand Metallogenic Province (Bsmp), Central Iran: Constrains On The Genesis Of Ioa Deposits, Sakine Amraei, Majid Ghasemi Siani, Mohammad Yazdi, Liang Qiu, Chang–Zhi Wu, Minghua Ren, Shahrokh Rajabpour
Apatite Chemistry From The Xv Ioa Deposit, The Bafq–Saqand Metallogenic Province (Bsmp), Central Iran: Constrains On The Genesis Of Ioa Deposits, Sakine Amraei, Majid Ghasemi Siani, Mohammad Yazdi, Liang Qiu, Chang–Zhi Wu, Minghua Ren, Shahrokh Rajabpour
Turkish Journal of Earth Sciences
In this study, we present petrographical and microanalytical (EPMA, LA–ICP–MS) results of apatites associated with Fe–Ti±P mineralization in the XV deposit in the BSMP. Apatite is predominantly observed as subhedral to euhedral, homogeneous grains, with no zoning or inclusions. Geochemically, apatite is fluorapatite of magmatic origin, with Cl/OH and Cl/F ratios of <0.05 and 0.01 to 0.07, respectively. Apatites from XV and other IOA deposits in the BSMP display a high F/Cl ratio, which is likely the main characteristic of IOA–type deposits such as the Kiruna-type deposit. Apatites from both rock types (gabbro and pyroxenite) exhibit similar rare earth elements (REEs) and multitrace element patterns, indicative of a shared origin. The highly light rare earth elements (LREEs)–enriched pattern in chondrite–normalized fractionation trends, along with positive Eu and slight negative Ce anomalies, as well the high (La/Sm)N and (La/Yb)N ratios of XV apatite, further corroborates the magmatic genesis of fluorapatite. The Eu/Eu* and Ce/Ce* ratios in XV rocks imply a high oxidation condition, as well as other IOA deposits in BSMP. The sulfur content is less than 1 wt% and shows a positive correlation with SiO2, implying coupled dissolution–reprecipitation of primary fluorapatite. Considering the geological setting of XV and other IOA deposits in the BSMP, the parental magma(s) appear to have originated from oxidizing Fe-Ti±P-rich magma(s), likely formed within an extensional postcollisional setting, influenced by the Proto–Tethys and Central Iranian Microcontinent (CIMC) convergence events.
First Record Of Scyphocrinoids In Türkiye And Recognition Of The Silurian/Devonian Boundary Interval (Halevikdere Section, Eastern Taurides), Eberhard Schindler, Reimund Haude, Mehmet Namik Yalçin, Rainer Brocke, Ati̇ke Nazi̇k, Emine Şeker Zor, Volker Wilde, Achim Wehrmann
First Record Of Scyphocrinoids In Türkiye And Recognition Of The Silurian/Devonian Boundary Interval (Halevikdere Section, Eastern Taurides), Eberhard Schindler, Reimund Haude, Mehmet Namik Yalçin, Rainer Brocke, Ati̇ke Nazi̇k, Emine Şeker Zor, Volker Wilde, Achim Wehrmann
Turkish Journal of Earth Sciences
During the Silurian/Devonian (S/D) boundary interval, scyphocrinoids (Crinoidea, Echinodermata) flourished on a global scale. The first record of scyphocrinoids from Türkiye, especially represented by their bulbuous loboliths, is now described from the Halevikdere Section in the Eastern Taurides. The Devonian part of the section is more than 1300 m thick and covers a time span from the S/D boundary interval to the Late Devonian (Famennian). It consists mainly of fine-grained to sandy siliciclastics, event-driven conglomerates/fanglomerates and biogenic carbonates deposited in deep shelf to shallow-water coastal settings. The S/D boundary interval was measured and studied in great detail. The dominant lithology …
The Quaternary Fluvial-Lacustrine System In The Akarçay Basin (Sw Anatolia): Depositional Environments And Paleoclimatic Interpretation, Koray Aktürk, Sevi̇nç Kapan
The Quaternary Fluvial-Lacustrine System In The Akarçay Basin (Sw Anatolia): Depositional Environments And Paleoclimatic Interpretation, Koray Aktürk, Sevi̇nç Kapan
Turkish Journal of Earth Sciences
The Akarçay Closed Basin, located in southwest Anatolia, contains deformed formations and the drying Akşehir and Eber lakes. This study aimed to interpret the paleoenvironmental and paleoclimatic conditions of the Akşehir and Eber lakes, which are reported to have been connected during the Pleistocene. Based on sedimentological and mineralogical data, three different depositional subenvironments were defined, corresponding to the formation and development stages of the lake. Sedimentary facies analysis of the Pleistocene deposits in the basin revealed the following facies associations, listed from bottom to top: 1) an alluvial fan and fluvial facies association, representing the formation stage of the …
Formation Of Holocene Paleosols In A Relict Sand Dune Sequence At Kıyıköy, Türkiye, Ahmet Evren Ergi̇nal, Mustafa Bozcu, Nuretti̇n Yakupoğlu, Abdullah Akbaş, Hakan Kaya, İsmai̇l Onur Tunç
Formation Of Holocene Paleosols In A Relict Sand Dune Sequence At Kıyıköy, Türkiye, Ahmet Evren Ergi̇nal, Mustafa Bozcu, Nuretti̇n Yakupoğlu, Abdullah Akbaş, Hakan Kaya, İsmai̇l Onur Tunç
Turkish Journal of Earth Sciences
The paleoclimatic indicators from a relict dune and paleosol sequence observed south of Kıyıköy Port, NW Türkiye, provide insights into the variable paleoclimatic conditions in the western Black Sea coastal zone over the last 4700 yrs BP. The relict dune- paleosol sequence consists of reddish-brown coarse sands with abundant shells and overlying paleosol. Radiocarbon dating of Donax trunculus shells collected from the lowest part of the relict dune revealed the onset of sand deposition 4689 ± 123 yrs ago. The dark-colored paleosol layer, with an Rb/Sr ratio of 0.008, yielded an age of 287 ± 32 yrs cal BP. These …
U-Pb Calcite Geochronology, Epr, Geochemistry, And C-O-Sr Isotopes Of Africanomarbles In The Seferihisar (İzmir, Türkiye) U-Pb Calcite Geochronology, Epr, Geochemistry, And C-O-Sr Isotopes Of Africano Marbles In The Seferihisar (İzmir, Türkiye), Fatma Şi̇şman Tükel, Namik Aysal, İpek Deni̇z Yildirim, Marcel Guillong, Tonguç Uysal, Si̇nan Öngen, Emre Erdem
U-Pb Calcite Geochronology, Epr, Geochemistry, And C-O-Sr Isotopes Of Africanomarbles In The Seferihisar (İzmir, Türkiye) U-Pb Calcite Geochronology, Epr, Geochemistry, And C-O-Sr Isotopes Of Africano Marbles In The Seferihisar (İzmir, Türkiye), Fatma Şi̇şman Tükel, Namik Aysal, İpek Deni̇z Yildirim, Marcel Guillong, Tonguç Uysal, Si̇nan Öngen, Emre Erdem
Turkish Journal of Earth Sciences
The Africano marbles (Africano Verde and Bigio Africano) extracted from the region of Sığacık (ancient Teos) region and its surroundings were widely used and even traded in construction and decorative items throughout the Roman period due to their brecciated and colourful appearance. There are two different types of Africano marble, the first consisting of marble breccias embedded in a dark matrix. In this type, the marble breccias show micritic, microsparitic, and sometimes sparitic textures formed by coarse-grained calcite, while the dark matrix consists of chlorite and/or serpentine minerals. The second type is Bigio Africano, which consists of grey-blue homogeneous limestones, …
Design And Optimization Of Low-Loss, High-Gain Metamaterial-Based Log-Periodic Dipole Array Antenna For Full Ka-Band Coverage, Mohamed El Moniar, Ahmed Abd El Hady, Yasser Ismail, Nihal Areed
Design And Optimization Of Low-Loss, High-Gain Metamaterial-Based Log-Periodic Dipole Array Antenna For Full Ka-Band Coverage, Mohamed El Moniar, Ahmed Abd El Hady, Yasser Ismail, Nihal Areed
Turkish Journal of Electrical Engineering and Computer Sciences
This work describes a microstrip log-periodic dipole array (MLPDA) antenna that uses metamaterials and operates across the whole Ka-band. The suggested MLPDA antenna layout provides a wide bandwidth with fewer dipole elements than traditional MLPDA antennas while maintaining the same resonance frequencies. To reduce size while covering a wide operational spectrum, the antenna design includes bending dipoles as radiating elements, as well as an incomplete ground plane. Furthermore, the proposed MLPDA antenna’s energy loss has been reduced while boosting its signal strength (gain) by inserting a metamaterial-based structure in front of it at a certain distance and on the same …
The Concept Of T-Basis And Vector-Valued Hardy Classes, Bilal Bilalov, Sabina Rahib Sadigova
The Concept Of T-Basis And Vector-Valued Hardy Classes, Bilal Bilalov, Sabina Rahib Sadigova
Turkish Journal of Mathematics
This paper introduces the concept of a t-basis generated by some bilinear mapping t(·;·). It is considered the vector-valued class Lp(X) := Lp(J; X), 1 ≤ p < +∞, where J = [−π, π] and X is a Banach space with the UMD property, and it is proven that the classical system of exponents {eint}n∈ℤ forms a t-basis for Lp(X), 1 < p < +∞. Using this fact, the Hardy vector classes nHp±(X), 1 < p < +∞, different from the classical ones, are defined, and an equivalent definition of these classes is given and some of their properties are studied. In addition, the concept of t-Riesz property of a system of exponentials is introduced in Lp(X), 1 < p < +∞, and it is proved that this system has the t-Riesz property. A new method is given for establishing the Plemelj–Sokhotski formulas for X-valued Cauchy type integrals when X has the UMD property. An abstract analogue of the “1/4-Kadets” theorem is obtained for …
Vilsmeier–Haack Complex Formation By Fe3O4@Sio2@Cs@Pocl2–X/Dmf: An Efficient Catalyst For Conversion Of Epoxides To Β-Bromoformates, Farzaneh Ebrahimzadeh
Vilsmeier–Haack Complex Formation By Fe3O4@Sio2@Cs@Pocl2–X/Dmf: An Efficient Catalyst For Conversion Of Epoxides To Β-Bromoformates, Farzaneh Ebrahimzadeh
Turkish Journal of Chemistry
The in situ generation of the Vilsmeier–Haack complex was studied by combining Fe3O4@SiO2@CS@POCl2–x with N,N-dimethylformamide (DMF), demonstrating remarkable efficiency and regioselectivity in transforming epoxides into β-bromoformates. The reported yields were notably high and were achieved under mild reaction conditions. Interestingly, the removal of DMF led to the synthesis of vic-dihalide compounds. The product of this transformation depended on the specific details of how the experiment was done, highlighting how sensitive the process is to different ways of conducting the experiment. The use of a magnetic core-shell catalyst, Fe3O …
Spherical Spiky Zno/Au Nanostructures For Efficient Photoelectrochemical Watersplitting, Kouroush Sali̇mi̇
Spherical Spiky Zno/Au Nanostructures For Efficient Photoelectrochemical Watersplitting, Kouroush Sali̇mi̇
Turkish Journal of Chemistry
Spiky zinc oxide (ZnO)/Au nanostructures with spherical shape-defined morphologies were synthesized using polydopamine as a starting template for photoelectrochemical H2 production under visible light-emitting diode (LED) illumination. This low-temperature processing technique not only facilitated the fabrication of ideal plasmon-sensitive heterostructures, but also enhanced the electron mobility of the photoanodes, reaching 5.7 mA/cm² [at 1.0 V vs. the reversible hydrogen electrode (RHE)] under visible LED illumination (30 mW/cm2). This notable value was 28 times greater than that observed under dark conditions, primarily attributed to the close Schottky contact between the Au and ZnO spikes. The highest applied bias photon-to-current efficiency value …
Wo3/Α-Fe2O3/Bi2S3 Ternary Photoanode For Improved Oxygen Evolution Reaction In Photoelectrochemical Water Splitting, Fati̇h Tezcan, Abrar Ahmad, Gülfeza Kardaş
Wo3/Α-Fe2O3/Bi2S3 Ternary Photoanode For Improved Oxygen Evolution Reaction In Photoelectrochemical Water Splitting, Fati̇h Tezcan, Abrar Ahmad, Gülfeza Kardaş
Turkish Journal of Chemistry
This study presents a ternary WO3/α-Fe2O3/Bi2S3 photoanode system suitable for photoelectrochemical water-splitting applications. The WO3/α-Fe2O3 heterojunction is obtained using a hydrothermal approach, while Bi2S3 is deposited onto WO3/α-Fe2O3 via the successive ionic layer adsorption and reaction (SILAR) method. The cycle count is adjusted to determine the optimal photocatalytic photoanode. X-ray diffraction analysis confirms different morphologies and phases for the photoelectrodes: WO3 is deposited as plates with monoclinic phases, α-Fe2O3 as nanorods with hexagonal phases, …
Synthesis Of Low Ph Stable, Highly Photocatalytic Alginate Hydrogels For Methylene Blue Removal From Wastewater, Emi̇rcan Uysal, Hali̇de Nur Dursun, Emre Can Uysal, Sebahatti̇n Gürmen
Synthesis Of Low Ph Stable, Highly Photocatalytic Alginate Hydrogels For Methylene Blue Removal From Wastewater, Emi̇rcan Uysal, Hali̇de Nur Dursun, Emre Can Uysal, Sebahatti̇n Gürmen
Turkish Journal of Chemistry
Chemical compounds in wastewater, including dye molecules, have been identified as significant concerns for environmental integrity and human health. In this study, adsorbent materials were synthesized from biodegradable polymers to remove methylene blue (MB) from wastewater. Calcium alginate hydrogels were produced and coated with chitosan to enhance their pH stability. Furthermore, the calcium alginate gels were doped with silver nanoparticles to improve their photocatalytic properties, promoting MB degradation and enabling gel reuse. The adsorption behavior of the gels was comprehensively examined under dark conditions, considering factors such as time, solid-to-liquid ratio, temperature, and pollutant concentration, all of which significantly impact …
Fabrication Of Au–Pd Bimetallic Dendrites And Their Catalytic Application For4-Nitrophenol Reduction, Jun Liu, Xuanyan Liu, Hongguang Liao
Fabrication Of Au–Pd Bimetallic Dendrites And Their Catalytic Application For4-Nitrophenol Reduction, Jun Liu, Xuanyan Liu, Hongguang Liao
Turkish Journal of Chemistry
Bimetal nanocatalysts hold significant application potential in catalytic reactions due to their compositions, morphologies, and electronic structures. In the present work, a series of AuPd alloy dendrites were successfully prepared using sodium formate, without surfactants or templates. A systematic investigation was then conducted to analyze the composition of the AuPd bimetallic dendrites and the effects of preparation conditions on their structure and catalytic performance. The AuPd alloy dendrites were characterized through various techniques, including scanning electron microscopy, transmission electron microscopy, X-ray energy scattering spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The results showed that the Au:Pd ratio in the AuPd …
Investigation Of The Interaction Conditions Of As2s5 And Cucl2 Compounds In Water And Ethylene Glycol Medium, Huseyn Imanov, Mahnur Jafarli
Investigation Of The Interaction Conditions Of As2s5 And Cucl2 Compounds In Water And Ethylene Glycol Medium, Huseyn Imanov, Mahnur Jafarli
Turkish Journal of Chemistry
The article presents the results of interaction conditions of CuCl2 and As2S5 in ethylene glycol and aquatic medium. Besides, results of the obtained samples' physicochemical properties are given by X-ray diffraction (XRD), differential thermogravimetric (DTG), thermogravimetric (TG), elemental and scanning electron microscope (SEM) methods. It was found that when ethylene glycol and water are used as a solvent and CuCl2 and As2S5 as the initial components, Cu3AsS4 is obtained at a temperature of 323-353 K. According to the results of DTA analysis, it was found that the melting point of obtained samples was 964.4 K contrary to the reactions carried …
Synthesis Of Thiazole-Integrated Pyrrolotriazinones: Evaluations Of Cytotoxicity And Effects On Pi3k Levels In Cancer Cells, Eylem Kuzu, Ege Arzuk, Fuat Karakuş, Burak Kuzu, Hasan Genç
Synthesis Of Thiazole-Integrated Pyrrolotriazinones: Evaluations Of Cytotoxicity And Effects On Pi3k Levels In Cancer Cells, Eylem Kuzu, Ege Arzuk, Fuat Karakuş, Burak Kuzu, Hasan Genç
Turkish Journal of Chemistry
The synthesis of novel heterocyclic compounds, particularly those targeting critical signaling pathways in cancer, represents a promising approach to drug development. In this study, we designed and synthesized a series of thiazole-integrated pyrrolotriazinone derivatives, aiming to combine the antiproliferative properties of thiazole with the PI3K inhibitory activity of pyrrolotriazinones. The PI3K pathway, which plays a critical role in regulating cell growth, proliferation, and survival, is frequently dysregulated in cancer, making it an attractive target for therapeutic intervention. The synthesized derivatives were evaluated for their cytotoxic activities against MCF-7, A549, and HepG2 cancer cell lines. Their effect on PI3K protein levels …
Ecofriendly Synthesis And Characterization Of Oxygen-Enriched G-C3n4 From Diverse Precursors For Efficient Organic Dye Decontamination, Muchammad Tamyiz
Ecofriendly Synthesis And Characterization Of Oxygen-Enriched G-C3n4 From Diverse Precursors For Efficient Organic Dye Decontamination, Muchammad Tamyiz
Turkish Journal of Chemistry
Industrial wastewater from sectors such as textiles, printing, and pharmaceuticals contains harmful pollutants, including nonbiodegradable dyes, which pose significant challenges for environmental safety. Neutral red, a cationic dye commonly found in wastewater, obstructs photosynthesis in aquatic ecosystems and carries potential toxicity. Traditional methods of dye removal often prove ineffective due to the chemical stability of these compounds. In this study, oxygen-doped graphitic carbon nitride (O-doped g-C3N4) was synthesized as an innovative photocatalyst for the degradation of neutral red dye under visible light. The material was synthesized through a sustainable process involving the calcination of urea, dicyandiamide, and oxalic acid, and …
A New Turn Off Fluorescent Nir Probe For Hypochlorous Acid And Its Applications, Ayten Ibrahimova, Ayşe Nur Önem, Mehmet Altun, Emi̇n Ahmet Yeşi̇l, Asli Baysal, Hasan Saygin, Ahu Soyocak, Mustafa Özyürek
A New Turn Off Fluorescent Nir Probe For Hypochlorous Acid And Its Applications, Ayten Ibrahimova, Ayşe Nur Önem, Mehmet Altun, Emi̇n Ahmet Yeşi̇l, Asli Baysal, Hasan Saygin, Ahu Soyocak, Mustafa Özyürek
Turkish Journal of Chemistry
Hypochlorous acid (HOCl) is a potent nonradical oxidant involved in various physiological processes, particularly within the human immune system. In this study, we introduce a novel, rapid, and highly efficient fluorometric method for the detection of HOCl. The method utilizes a near-infrared (NIR)-based fluorescent probe, NIR-QBH, which is characterized by its high sensitivity and chemical stability. NIR-QBH, containing olefinic C=C bonds, exhibits strong NIR emission at 660 nm (λex = 618 nm). The detection mechanism relies on the oxidation of the C=C bond in the NIR-QBH structure by HOCl, resulting in the formation of non-fluorescent products. With a detection limit …
White Pupil Fibre-Fed Echelle Spectrograph Of The Russian-Turkish 1.5 M Telescope: Optical Design And Analysis, Cevdet Bayar, Nuri̇ Unal
White Pupil Fibre-Fed Echelle Spectrograph Of The Russian-Turkish 1.5 M Telescope: Optical Design And Analysis, Cevdet Bayar, Nuri̇ Unal
Turkish Journal of Physics
This study presents optical designs of two fibre-fed èchelle spectrographs (FES), which differ from each other in terms of cross-dispersers, and optical analyses of the spectra (orders) obtained from the designs. Optical analyses of both designs were performed by interpreting the results obtained from the spot diagram, footprint diagram, and encircled energy diagram in the ZEMAX (OpticStudio) optical design program. In the first spectrograph design, prisms were used as the cross-disperser. Specifically, two symmetric N-F2 glass prisms with 42-degree apex angles were used as the cross-disperser. In the second design, a grism was used as the cross-disperser. This grism was …
Rotating Anisotropic Bose Gas With Large Number Of Vortices, Ahmet Keleş
Rotating Anisotropic Bose Gas With Large Number Of Vortices, Ahmet Keleş
Turkish Journal of Physics
Rapidly rotating atomic gases provide a platform for studying phenomena akin to type-II superconductors and quantum Hall systems. Recently, these systems have attracted renewed interest due to technological advances in the trap anisotropy control, in-situ observation capabilities, and cooling and rotating complex atomic species such as dipolar gases. Understanding the vortex lattice formation and quantum melting is crucial for exploring quantum Hall physics in these systems. In this paper, we theoretically investigate the vortex lattices in anisotropic quantum gases. We formulate the rotating gas Hamiltonian in the Landau gauge, and consider the effects of additional perturbations such as the trap …
Supersymmetric Exploration Of External Field Effects On Spinning Cosmic Strings With Aharonov–Bohm Interaction, Bi̇lgehan Bariş Öner, Özlem Yeşi̇ltaş
Supersymmetric Exploration Of External Field Effects On Spinning Cosmic Strings With Aharonov–Bohm Interaction, Bi̇lgehan Bariş Öner, Özlem Yeşi̇ltaş
Turkish Journal of Physics
We have conducted a supersymmetric analysis of the spacetime of a spinning cosmic string, focusing on the behavior of an electron in magnetic fields. Our study involves examining the Dirac system through the lens of exceptional orthogonal polynomials, specifically the exceptional orthogonal Laguerre $X_{m}$ polynomials. This analysis transforms the Dirac system into a relativistic system with a nonlinear isotonic oscillator. Additionally, we introduce new potential models that extend the radial oscillator by incorporating rational terms. Comprehensive analyses of the potential, energy levels, and probability density graphs are provided for various topological defects of cosmic strings and different parameters of the …
Optimizing Parameters For Efficient Computation With Fully Homomorphic Encryption Schemes, Cavi̇dan Yakupoğlu Karaağaç, Kurt Rohloff
Optimizing Parameters For Efficient Computation With Fully Homomorphic Encryption Schemes, Cavi̇dan Yakupoğlu Karaağaç, Kurt Rohloff
Turkish Journal of Electrical Engineering and Computer Sciences
In this study, we aim to provide a parameter selection approach for the BFVrns scheme, one of the prominent fully homomorphic encryption (FHE) schemes. Selecting parameters for lattice-based FHE schemes poses a practical challenge for both experts and nonexperts. To solve this problem, we introduce a hybrid approach that combines theoretical approach with experimental analysis. First, we employ regression analysis to examine the impact of parameters on both performance and security. The varying behavior of FHE parameters in terms of performance, security, and ciphertext expansion factor (CEF) makes parameter selection more challenging. To address this issue, we employ a multi-objective …
Decomposition Lstm With Dual Multi-Head Self-Attention For Wind Turbine Drivetrain State Forecasting, Haikun Jia, Huini Sun, Shuang Bai
Decomposition Lstm With Dual Multi-Head Self-Attention For Wind Turbine Drivetrain State Forecasting, Haikun Jia, Huini Sun, Shuang Bai
Turkish Journal of Electrical Engineering and Computer Sciences
Due to the clean and renewable nature of wind energy, accurate prediction of rotor loads and operating states for wind turbine units has become of paramount importance. Currently, traditional methods relying on expert analysis combined with instrument testing for qualitative reasoning are both time-consuming and labor-intensive, and their accuracy guarantees are limited. In response to wind farm data entailing the interweaving of data from multiple sources and the diverse interrelations across various features and time steps, this study introduces a method for predicting rotor loads and operating states. Initially, we employ an iterative multi-scale seasonal-trend decomposition block to capture latent …