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Biquandle Power Brackets Of Oriented Links, Nesli̇han Gügümcü, Sam Nelson
Biquandle Power Brackets Of Oriented Links, Nesli̇han Gügümcü, Sam Nelson
Turkish Journal of Mathematics
In this paper, we introduce biquandle power brackets, an infinite family of invariants of oriented links containing the classical skein invariants and the quandle and biquandle 2-cocycle invariants as special cases. Biquandle power brackets are generalizations of biquandle brackets in which the values of Kauffman states also depend on the biquandle colors they admit. We provide example computations and discuss the relationship between these new invariants and the previous cases.
Order Structure Of Order-To-Topological Continuous Operator, Gül Si̇nem Keleş, Bahri̇ Turan, Bi̇rol Altin
Order Structure Of Order-To-Topological Continuous Operator, Gül Si̇nem Keleş, Bahri̇ Turan, Bi̇rol Altin
Turkish Journal of Mathematics
Let J be a vector lattice, and W be a topological vector space. An operator K: J → W is called an order-to-topological continuous operator if uα → 0 in J implies K(uα) → 0 in W for each net (uα) in J. In this study, we examine the order structure of the space of order-to-topological continuous operators in general and the order structure of order-to-norm continuous operators in particular. We study the relationships between order-to-topology continuous operators and other classes of operators, such as order weakly compact and order continuous operators. Moreover, we give …
Fractional Equivalent Of Fourth-Order Laguerre And Chebyshev Polynomials, Zahra Kavousi, Kazem Ghanbari
Fractional Equivalent Of Fourth-Order Laguerre And Chebyshev Polynomials, Zahra Kavousi, Kazem Ghanbari
Turkish Journal of Mathematics
Orthogonal polynomials have very useful properties in the solution of mathematical and physical problems. In the last few years, there has been considerable interest in the properties of orthogonal polynomials satisfying differential equations (DE) of order greater than two, their connection to singular boundary value problems, their generalizations, and their classification as solutions of second-order DE. In this paper, we develop a fractional analog of the fourth-order Laguerre differential equation on the interval [0, ∞) and, in addition, we develop a fractional analog of the fourth-order Chebyshev differential equation on a symmetric interval [−α, α], where α is the order …
Continuous Dependence Of Thermoelasticity Problem, Müge Meyvaci, Şevket Gür
Continuous Dependence Of Thermoelasticity Problem, Müge Meyvaci, Şevket Gür
Turkish Journal of Mathematics
The current study considers the initial boundary value problem for the thermoelastic model. The model in which heat conduction is given by Green and Naghdi's theory is called Type II. It is increasingly accepted that studying the structural stability of the initial boundary value problem is crucial. This is because even minor changes in the equation or its coefficients can lead to significant variations in the solution of the problem. From this point of view, we analyze the structural stability of the solutions, specifically examining the continuous dependence of the solutions on all the coefficients of the thermoelastic system, using …
A Note On A Novel Type Of Alster Covering Property In Bitopological Setting, Necati̇ Can Açikgöz, Ceren Sultan Elmali
A Note On A Novel Type Of Alster Covering Property In Bitopological Setting, Necati̇ Can Açikgöz, Ceren Sultan Elmali
Turkish Journal of Mathematics
In this paper, we introduce a new type of Alster covering property in bitopological setting. We investigate its relations with other existing covering properties. By giving counterexamples, we indicate that our new property is different than other mentioned properties. We also construct some conditions for equivalences of those properties with the corresponding property. We also consider the preservation of this new form of bitopological Alster covering property. We investigate the productivity of bitopological nearly Lindelöfness and bitopological nearly Mengerness.
Improving Upper Bounds Of Berezin Number Inequalities Using Convex Function, Sana Khan, Mehmet Gürdal, Muhammad Saeed Akram
Improving Upper Bounds Of Berezin Number Inequalities Using Convex Function, Sana Khan, Mehmet Gürdal, Muhammad Saeed Akram
Turkish Journal of Mathematics
In this research article, new upper bounds are established for the Berezin number of bounded linear operators within the context of functional Hilbert space using the convex function. These bounds are achieved by exploiting an extension of Furuta's inequality and an extension of Kato's inequality. These Berezin number bounds are refinements of already existing bounds found in the literature.
Still More On Wahlquist Metric, Mahmut Hortaçsu
Still More On Wahlquist Metric, Mahmut Hortaçsu
Turkish Journal of Physics
We start by reviewing the status of the Wahlquist metric and give references to the relevant literature. Then, in studying the scattering properties of a scalar particle at the center coming from infinity, we give three methods to obtain finite scattering coefficients.
Luminescence Dating And Its Application To Anthropogenic Sedimentary Sequences:Tepecik-Çiftlik Prehistoric Settlement, Eren Şahi̇ner, Mehmet Korhan Erturaç
Luminescence Dating And Its Application To Anthropogenic Sedimentary Sequences:Tepecik-Çiftlik Prehistoric Settlement, Eren Şahi̇ner, Mehmet Korhan Erturaç
Turkish Journal of Earth Sciences
Luminescence dating is a fundamental technique in the field of earth sciences research, offering a reliable method fordetermining the age of sediments and artifacts. Applications of luminescence dating in archaeology include the dating of ancienthabitation sites, burial mounds, and artifacts such as pottery. This provides a chronological framework for understanding humanactivities and environmental changes over millennia. The capacity of luminescence dating to ascertain the age of events spanning a fewdecades to several hundred thousand years renders it an indispensable instrument for the construction of timelines and interpretationof the past. This study presents a concise overview of the various stages of …
Evaluation Of Physical And Chemical Condition Of A Group Of Waterloggedarchaeological Woods From The Yenikapı 16 Shipwreck, Sedef Hetto, Namik Kiliç, Asli Gökçe Kiliç
Evaluation Of Physical And Chemical Condition Of A Group Of Waterloggedarchaeological Woods From The Yenikapı 16 Shipwreck, Sedef Hetto, Namik Kiliç, Asli Gökçe Kiliç
Turkish Journal of Earth Sciences
This study examined the physical and chemical condition of waterlogged archaeological wood (WAW) samples from the Yenikapı 16 shipwreck of plane (Platanus L.), elm (Ulmus L.), pine (Pinus L.), and fir (Abies L.), representing species with different wood properties. The maximum water content (MWC) and basic density (BD) values of 74 WAW samples from the shipwreck were calculated, and 7 of 74 samples were selected for analysis using scanning electron microscopy (SEM), X-ray fluorescence (XRF), and Fourier transform infrared spectroscopy (FTIR). The availability of samples, appropriate size, the species of the wood, and the wood’s degradation were all considered. The …
Geochemical Discriminants For The Provenance Characterization Of Ceramics, Kiymet Deni̇z Yağcioğlu, Yusuf Kağan Kadioğlu
Geochemical Discriminants For The Provenance Characterization Of Ceramics, Kiymet Deni̇z Yağcioğlu, Yusuf Kağan Kadioğlu
Turkish Journal of Earth Sciences
Cultural heritage can be effectively protected and restored by accurately identifying archaeometric materials used inhistorical sites, such as rocks, ceramics, bricks, mortar, and plaster, and determining their origins. This interdisciplinary study employsmineralogical, petrographic, and isotopic properties together with geochemical analyses to ascertain the origins of these materials. Thisstudy focuses on the provenance characterization of ceramics as possible source rocks of ceramic raw material using new geochemicaldiscrimination diagrams. Detailed geochemical analyses of manufactured ceramics from various rock types from different locationswere conducted and new geochemical discrimination diagrams were created to determine the origins of the ceramics. The geochemicaldata of ceramics that …
Environmental And Cultural Impacts Of The 8.2 Ka Event In Yenikapı (İstanbul/Türkiye), Ayşi̇n Konak, M. Namik Yalçin
Environmental And Cultural Impacts Of The 8.2 Ka Event In Yenikapı (İstanbul/Türkiye), Ayşi̇n Konak, M. Namik Yalçin
Turkish Journal of Earth Sciences
The Neolithic lifestyle, which began in the 12th millennium BP with the emergence of villages in the core region extendingfrom Iran to central and southeastern Anatolia and Syria, began to spread to neighboring geographies, such as the Marmara region,in the 9th millennium BP. During the 8.2 ka event that occurred between 8300 and 7900 BP, cold and dry conditions prevailed in thenorthern hemisphere. During the winter months, the humidity decreased and cooling of about 6 ± 2 °C was observed. In order totest whether the 8.2 ka event was also effective in the İstanbul region, a set of inorganic geochemical …
Characterization Of Thin Marble Slabs Cut With Roman Water-Powered Stone Saw Millsfrom Western Asia Minor, Hakan Elçi̇, Ramazan Hacimustafaoğlu, Serdar Aybek
Characterization Of Thin Marble Slabs Cut With Roman Water-Powered Stone Saw Millsfrom Western Asia Minor, Hakan Elçi̇, Ramazan Hacimustafaoğlu, Serdar Aybek
Turkish Journal of Earth Sciences
This study examined the mineralogical, petrographic, technological, and material properties of thinly cut marble slabs usedin the flooring and cladding of the frigidarium section of a bath constructed in the 2nd century AD in Metropolis, a city that connectedtwo significant centers in Western Asia Minor-Ephesus and Smyrna-during the Roman period. The study also explains the possibletechniques and methods by which these marble slabs could have been cut so thinly. The thickness of the marble slabs used was closelyrelated to their material properties. Bluish grey, with calcite veins with low flexural strength, containing medium to coarse crystallinecalcite veins, and white marbles …
Minero-Petrographic, Geochemical, And Multiisotopic Characterization Of The Ancientbanded Travertine Quarries Of The Lycus Valley (Denizli, Türkiye), Tamer Koralay, Nergi̇s İmre
Minero-Petrographic, Geochemical, And Multiisotopic Characterization Of The Ancientbanded Travertine Quarries Of The Lycus Valley (Denizli, Türkiye), Tamer Koralay, Nergi̇s İmre
Turkish Journal of Earth Sciences
The Lycus Valley in Western Anatolia has been the site of numerous civilizations since ancient times due to historical, geopolitical, and climatological characteristics. Banded travertine is a ubiquitous architectural stone observed in ancient settlements in the Lycus Valley. Banded travertines referred to as “Alabastro Fiorito,” “Alabastro Listato,” and “Alabastro Rossa” in archaeological bibliographies have been extracted from the ancient quarries of Çukurbağ, Hierapolis, Develi-Akköy, Gölemezli, and Tripolis in the Lycus Valley and are characterized by white, yellow, brown, red, and red-burgundy colored bands with thicknesses ranging from a few millimeters to centimeters. The banded travertines have similar mineral compositions and …
Classification Of Asia Minor Marbles Based On Crystal Size For Archaeometric Assignment, Ramazan Hacimustafaoğlu, Hakan Elçi̇
Classification Of Asia Minor Marbles Based On Crystal Size For Archaeometric Assignment, Ramazan Hacimustafaoğlu, Hakan Elçi̇
Turkish Journal of Earth Sciences
This study was carried out to determine the range of crystal sizes of Asia Minor marbles and to classify the marbles accordingto crystal size. Asia Minor marbles have been used as building stones since ancient times. The literature already includes studies on theircrystal sizes; however, different studies performed on marbles of the same locality have reported different crystal size classes, which hascaused complexity. To eliminate this complexity, this study used multidirectional petrographic analyses on the eight known Asia Minormarbles. Thin sections were photographed under a polarizing microscope, and the crystal sizes of the samples were measured usingcomputerized image analysis. An …
Petrography, Electron Paramagnetic Resonance, Geochemistry, And Sr-C-O Isotope Datafor Provenance Studies Of The Ancient Marmor Iassense In Kıyıkışlacık(Muğla Region), Türkiye, Namik Aysal, Emre Erdem, Nurullah Hani̇lçi̇, Tali̇p Güngör, Si̇nan Öngen, İsak Yilmaz, Fulya Uzun, Davut Laçi̇n, İpek Deni̇z Yildirim
Petrography, Electron Paramagnetic Resonance, Geochemistry, And Sr-C-O Isotope Datafor Provenance Studies Of The Ancient Marmor Iassense In Kıyıkışlacık(Muğla Region), Türkiye, Namik Aysal, Emre Erdem, Nurullah Hani̇lçi̇, Tali̇p Güngör, Si̇nan Öngen, İsak Yilmaz, Fulya Uzun, Davut Laçi̇n, İpek Deni̇z Yildirim
Turkish Journal of Earth Sciences
The Marmor Iassense (Iasos marble, Marmor Carium) banded marbles, produced from the Kızılağaç Formation near thevillage of Kıyıkışlacık, have been favorite marbles from ancient times to the present day with their colors and patterns. During theRoman and Byzantine periods, they were preferred as decorative stones for many important buildings in İstanbul, such as the HagiaSophia, Chora Monastery (Kariye Mosque), and Church of the Holy Apostles, as well as San Vitale in Ravenna and other buildingsthroughout the Mediterranean region. They were used in wall coverings, flooring, columns, and mosaics. These marbles contain redand gray-white alternating folded layers of different thicknesses. They …
Characterization Of Stone Materials From The Roman Caracalla Bath In Ancyra, Zeynep Tanriverdi̇, Ali̇ Akin Akyol, Yusuf Kağan Kadioğlu
Characterization Of Stone Materials From The Roman Caracalla Bath In Ancyra, Zeynep Tanriverdi̇, Ali̇ Akin Akyol, Yusuf Kağan Kadioğlu
Turkish Journal of Earth Sciences
The Roman Caracalla Bath was built during the reign of Roman Emperor Caracalla (circa AD 200). Today it exists only inthe form of wall remnants at the foundation level and functions as an open-air museum. It is located on a mound approximately 2.5-mhigh along Ulus’s Çankırı Street in Ankara. This research paper aims to identify the characterization and implications for provenance ofthe stone materials used in the construction of the bath by using mineralogical, petrographic, and geochemical definitions. The resultsobtained from the stone materials also provide guidance for restoration and reinforcement of the bath. In this study, the 13 stone …
Digital Documentation Of A Byzantine Rock-Carved Structure In Konya:Kiriakon Monastery, Sille, Hasan Bi̇lgehan Maki̇neci̇, İlker Mete Mi̇mi̇roğlu, Esra Yaldiz, Hakan Karabörk
Digital Documentation Of A Byzantine Rock-Carved Structure In Konya:Kiriakon Monastery, Sille, Hasan Bi̇lgehan Maki̇neci̇, İlker Mete Mi̇mi̇roğlu, Esra Yaldiz, Hakan Karabörk
Turkish Journal of Earth Sciences
Digital documentation methods enable the acquisition of viable data to preserve cultural heritage and its accurate transferto future generations. Unmanned aerial vehicle (UAV) and terrestrial laser scanning (TLS) equipment are technical tools that haveessential functions in the three-dimensional (3D) modeling of structures of historical importance. In the geographic referencing andvisualization of historical structures with their surroundings, UAVs are often used, and for the visualization of the interior spaces ofstructures as a whole, TLS is popular. The Kiriakon Monastery, a rock-carved, cross-in-square, four-supports simple provincial typeof church, and several different structures around it within the borders of Sille in Konya Province …
Multianalytical Characterization Of Byzantine Wall Paintings By Sem-Edx,Μ-Xrd, Raman And Ftir Techniques, Onur Şi̇mşek, Fati̇h Özbaş, Ersi̇n Kaygisiz, Gözem Yaşayan, Gülce Öğrüç Ildiz
Multianalytical Characterization Of Byzantine Wall Paintings By Sem-Edx,Μ-Xrd, Raman And Ftir Techniques, Onur Şi̇mşek, Fati̇h Özbaş, Ersi̇n Kaygisiz, Gözem Yaşayan, Gülce Öğrüç Ildiz
Turkish Journal of Earth Sciences
In this study, various analytical methods were employed to examine the mineral based natural pigments in the frescoes of themedieval (9th century) Byzantine church, known today as the Atik Mustafa Pasha Mosque. The techniques include μ-X-ray diffraction(μ-XRD), Raman and Fourier transform infrared (FTIR) spectroscopies, and scanning electron microscopy coupled with energydispersive X-ray spectroscopy (SEM–EDX). The SEM-EDX technique enabled the identification of the chemical element compositionin the studied pieces, while Raman and FTIR spectroscopies, as well as XRD, allowed the identification of mineral phases and mineralbased natural pigments in the paints of the frescoes. Fragments of various colors (red, black, yellow, …
Rocks Used In Polished Stone Axe Production In Eastern Thrace (Türkiye) During Theneolithic Period: A Geochemical, Petrographic, And Geoarchaeological Approach, Ti̇mur Ustaömer, Zeynep Özbey, M. Namik Yalçin, Mehmet Celal Özdoğan, Eylem Özdoğan, İsmai̇l Ozan Çilgin, Abdüssamed Güven
Rocks Used In Polished Stone Axe Production In Eastern Thrace (Türkiye) During Theneolithic Period: A Geochemical, Petrographic, And Geoarchaeological Approach, Ti̇mur Ustaömer, Zeynep Özbey, M. Namik Yalçin, Mehmet Celal Özdoğan, Eylem Özdoğan, İsmai̇l Ozan Çilgin, Abdüssamed Güven
Turkish Journal of Earth Sciences
Twenty-nine Neolithic polished stone axes from various archaeological sites in Eastern Thrace and İstanbul were analyzedin this study using petrographic and geochemical methods to identify their lithologies and locate their source rocks. We found thatvariable rock types, including diabase, siltstone, lava, granite, and serpentinite, were used to produce these stone tools in workshops.The same techniques were applied to samples of potential source rocks from a large area in NW Türkiye to determine the locations ofthe source rocks used to produce the stone axes. Diabase dykes of Şarköy ophiolite were identified as the source rock for the diabasepolished stone axes, the …
Integrated Convolutional Neural Network For Skin Cancer Classification With Hair And Noise Restoration, Ni̇dhi̇ Bansal, Sri̇dhar Sundaramurthy
Integrated Convolutional Neural Network For Skin Cancer Classification With Hair And Noise Restoration, Ni̇dhi̇ Bansal, Sri̇dhar Sundaramurthy
Turkish Journal of Medical Sciences
Background/aim: Skin lesions are commonly diagnosed and classified using dermoscopic images. There are many artifacts visible in dermoscopic images, including hair strands, noise, bubbles, blood vessels, poor illumination, and moles. These artifacts can obscure crucial information about lesions, which limits the ability to diagnose lesions automatically. This study investigated how hair and noise artifacts in lesion images affect classifier performance and how they can be removed to improve diagnostic accuracy.Materials and methods: A synthetic dataset created using hair simulation and noise simulation was used in conjunction with the HAM10000 benchmark dataset. Moreover, integrated convolutional neural networks (CNNs) were proposed for …
A New Approach In The Treatment Of Ultrasound-Guided Synovial Hypertrophy, Emel Güler, Alper Doğanci
A New Approach In The Treatment Of Ultrasound-Guided Synovial Hypertrophy, Emel Güler, Alper Doğanci
Turkish Journal of Medical Sciences
Background/aimKnee osteoarthritis (OA) causes pain, limited movement, and negatively impacts daily life in older adults. Hypertrophy and changes in the synovial tissue significantly contribute to the pain. While intra-articular injections are common in OA treatment, specific therapies for hypertrophic tissue are rarely mentioned. This study aims to evaluate the long-term outcomes of local anesthetic and steroid injections in the knee's intra-articular space and hypertrophic synovial tissue.Materials and methodsOur retrospective study included patients with grade 3-4 kne OA diagnosed with ultrasound-guided suprapatellar effusion and synovial hypertrophy. Pain was assessed using the Numerical Rating Pain Scale (NRS), and functional capacity was evaluated …
A New Formula For Predicting The Actual Volume Of Parathyroid Adenoma In Patients With Primary Hyperparathyroidism, İbrahi̇m Kilinç, Mustafa Oruç, Serap Ulusoy, Ali̇ Coşkun, Mehmet Kiliç
A New Formula For Predicting The Actual Volume Of Parathyroid Adenoma In Patients With Primary Hyperparathyroidism, İbrahi̇m Kilinç, Mustafa Oruç, Serap Ulusoy, Ali̇ Coşkun, Mehmet Kiliç
Turkish Journal of Medical Sciences
Backround/AimKnowing the adenoma volume in patients with primary hyperparathyroidism (PHPT) is useful for surgeons during parathyroidectomy. The primary aim of our study was to determine how to calculate adenoma volume with the greatest accuracy. Our secondary aim was to determine the relationship between adenoma volume and preoperative biochemical parameters (parathyroid hormone [PTH] and calcium levels).Material and MethodsWe prospectively collected the medical history of 75 patients who underwent surgery for a single parathyroid adenoma. After excision, the adenomas were placed in water-filled syringes and the actual volume was determined according to the amount of water displaced. The radiological volume of the …
Nonadhesive Membranes: Preparation And Characterization Of Modified Phbhx Membranes, Funda Alkan, Murat Demi̇rbi̇lek, Oktay Aydin, Berrak Gümüşkaya Öcal, Neli̇sa Laçi̇n Türkoğlu, Mustafa Türk, Mehmet Ali̇ Onur
Nonadhesive Membranes: Preparation And Characterization Of Modified Phbhx Membranes, Funda Alkan, Murat Demi̇rbi̇lek, Oktay Aydin, Berrak Gümüşkaya Öcal, Neli̇sa Laçi̇n Türkoğlu, Mustafa Türk, Mehmet Ali̇ Onur
Turkish Journal of Chemistry
After abdominal surgery, there is a possibility of adhesions between the abdominal organs and the abdominal wall. Theadhesions can lead to problems such as chronic pain, intestinal blockage, and infertility. To prevent adhesion, antiadhesion patchescan be used. In this study, poly hydroxybutyrate-co-hexanoate membranes were fabricated as antiadhesion patches and modified witheither fatty acids or polyethylene glycol. The homogeneity and protein absorption of the membranes were assessed. The effects onblood coagulation factors were determined and the adhesion-proliferation properties of human fibroblast cells on the membranes weredetermined. The results show that myristic acid slightly increases surface free energy (40.7 ± 4.2 mN/m), …
A Hindered Phenol Containing Pvc/Cuo Nanocomposites; Study On The Mechanical And Thermooxidative Properties, Mohsen Hajibeygi, Alireza Ghasemi
A Hindered Phenol Containing Pvc/Cuo Nanocomposites; Study On The Mechanical And Thermooxidative Properties, Mohsen Hajibeygi, Alireza Ghasemi
Turkish Journal of Chemistry
The effect of synthesized 5-((4-hydroxy-3,5-di-tert-butylphenyl)diazenyl)isophthalic acid (HBA) containing a hinderedphenol derivative on the thermooxidation, hydrochloric acid release time, and mechanical strength of PVC/CuO nanocompositeswas studied. Moreover, 5-((4-hydroxy-2,5-dimethylphenyl)diazenyl)isophthalic acid (HMA) was synthesized for comparison ofcorresponding PVC nanocomposite properties. PVC nanocomposite thin films were prepared through in situ surface modificationof CuO nanoparticles with HBA and HMA, individually, in the PVC solution. The XRD and FE-SEM results clarified the desirabledispersion of CuO nanoparticles. The PVC sample with loading of 5 wt% from each HBA and CuO was found to be the most thermallystable, which was confirmed by thermogravimetric analysis in inert conditions. The …
Platinum Group Metal (Pgm) Free Multi Metallic Nanomaterial: A Potential Electrocatalyst For Ethanol Oxidation, Susmita Singh, Prodipta Pal, Soumik Roy, Shalini Basak, Prantica Saha, Anushna Dutta, Sinthia Saha, Mainak Bose
Platinum Group Metal (Pgm) Free Multi Metallic Nanomaterial: A Potential Electrocatalyst For Ethanol Oxidation, Susmita Singh, Prodipta Pal, Soumik Roy, Shalini Basak, Prantica Saha, Anushna Dutta, Sinthia Saha, Mainak Bose
Turkish Journal of Chemistry
Comprehensive studies of the ethanol oxidation reaction (EOR) have shown high interest in fuel cell technologies. As anodecatalysts, introducing platinum group metal (PGM) free catalyst is promising for higher catalytic activity towards the EOR, as these arecost-effective, pollution-tolerant, and suitable for sustainable energy conversion. In this investigation, multi walled carbon nanotube(MWCNT) supported PGM-free electrocatalysts are synthesized by the impregnation reduction method. The atomic structure,composition, and morphology of nanoalloy catalysts are discovered through X-ray diffraction (XRD), Raman spectroscopy and fourier-transform infrared (FTIR) spectroscopy techniques. Electrochemical behaviours have been analysed by cyclic voltammetry (CV), linearsweep voltammetry (LSV), Chronoamperometry (CA), and electrochemical impedance …
Preparation And Characterization Of Rhfe/G-C3n4 Nanoparticles For Efficient Hydrolysis Of Sodium Borohydride, Merve Uçar Kaya, Mehmet Yurderi̇, Mehmet Zahmakiran
Preparation And Characterization Of Rhfe/G-C3n4 Nanoparticles For Efficient Hydrolysis Of Sodium Borohydride, Merve Uçar Kaya, Mehmet Yurderi̇, Mehmet Zahmakiran
Turkish Journal of Chemistry
Highly effective graphitic carbon nitride-supported RhFe Nanoparticles (denoted as RhFe/g-C3N4) were prepared using a simple wet impregnation-reduction method for the hydrolysis of sodium borohydride (NaBH4). The obtained RhFe/g-C3N4 catalyst was characterized using advanced analytical/spectroscopic techniques such as inductively coupled plasma-optical emission spectroscopy (ICP-OES), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Powder X-ray diffraction (P-XRD), X-ray spectroscopy (XPS), and fourier transform infrared spectroscopy (FT-IR). The catalytic activities of RhFe/g-C3N4 catalysts with varying Rh/Fe molar ratios were investigated, demonstrating superior catalytic activity compared to monometallic Rh and Fe. The initial turnover frequency (TOF) value of the Rh0.48Fe0.52/g-C3N4 catalyst was calculated as …
The Magnetic Beads-Based Sandwich-Shaped Immune Complexes For Rapid And Sensitiveamperometric Detection Of Sox2 Protein, Göksu Özçeli̇kay Akyildiz, Mehmet Altay Ünal, Seçi̇l Gülden, Si̇bel Ayşil Özkan
The Magnetic Beads-Based Sandwich-Shaped Immune Complexes For Rapid And Sensitiveamperometric Detection Of Sox2 Protein, Göksu Özçeli̇kay Akyildiz, Mehmet Altay Ünal, Seçi̇l Gülden, Si̇bel Ayşil Özkan
Turkish Journal of Chemistry
Sex-Determining Region Y-box 2 (SOX2) is a transcription factor protein. SOX2 expression is related to lymph nodemetastasis and distant metastasis in colorectal carcinomas. SOX2 was determined with the first magnetic disposable immunoplatform.The designed sandwich-shaped immune complexes were formed by a capture antibody, SOX2 protein, and biotinylated secondaryantibodies (dAb/HRP). The sandwich-shaped immune complex was linked to carboxylic acid functionalized magnetic beads (HOOC-MBs). This magnetic bioconjugate was dropped on the surface of the screen-printed carbon electrode (SPCE). The amperometricmeasurement was performed at –0.20 V in the presence of hydroquinone (HQ) and H2O2 against a silver pseudo-reference electrode.The optimization parameters affecting the immunoassay …
Masking Of Iron And Other Interferences During The Spectrophotometric Analysis Of Aluminum From Soil Samples Using Alizarin Red S, Hafiz Zain Ul Aabidin, Muhammad Inam Ul Hassan, Tariq Yasin, Muhammad Zubair Rahim, Ahsan Amin Bhatti, Hamayun Imtiaz, Asif Raza
Masking Of Iron And Other Interferences During The Spectrophotometric Analysis Of Aluminum From Soil Samples Using Alizarin Red S, Hafiz Zain Ul Aabidin, Muhammad Inam Ul Hassan, Tariq Yasin, Muhammad Zubair Rahim, Ahsan Amin Bhatti, Hamayun Imtiaz, Asif Raza
Turkish Journal of Chemistry
In whole-rock geochemical analysis, the quantification of aluminum in geological samples is performed using differentanalytical techniques including UV-Vis spectrophotometry. During the spectrophotometric analysis of aluminum utilizing AlizarinRed S, iron causes significant interference, leading to inaccurate measurements of the amount of aluminum in the sample. In caseswhere leached or processed samples contain titanium, interference is also observed. However, appropriate masking agents can removethese interferences. In this study, various masking agents including Tiron, oxalic acid, ascorbic acid, and thioglycolic acid were utilizedfor the masking of iron. Among these masking agents, ascorbic acid proved to be the best candidate for masking iron. A …
A New Water-Soluble Silicon Phthalocyanine That Catalyzes The Photodegradation Of Pollutant Dyes, Damla Nur Kaya, Behi̇ce Sebnem Sesalan
A New Water-Soluble Silicon Phthalocyanine That Catalyzes The Photodegradation Of Pollutant Dyes, Damla Nur Kaya, Behi̇ce Sebnem Sesalan
Turkish Journal of Chemistry
The removal of color arising from water-soluble dyes in wastewaters is necessary to counter the threat to health. Because of thedifficulty in elimination of these dyes by conventional methods, their photodegradation using photosensitizers such as phthalocyanines(Pcs) has been employed recently. When compared to peripherally substituted derivatives, silicon Pcs are reported to be morebiocompatible with low toxicity. Thus a new silicon Pc substituted with two quaternized dimethylamino phenoxy units (compound 1)and its quaternized derivative (compound 2) were synthesized to test its photocatalytic ability employing the dyes methylene blue (MB),eosin B (EB), erythrosine (ERB), sulforhodamine B (SRB), and brilliant blue FCF (BRB), …