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The Geometry Of Semislant Submersions Whose Total Manifolds Are Locally Conformal Kähler Manifolds, Çağrihan Çi̇men, Hakan Mete Taştan

Turkish Journal of Mathematics

We study semislant submersions whose total manifolds are locally conformal Kähler manifolds. We provide conditions for the total geodesicity and integrability of the distributions involved in the definition. Next, we establish a condition under which such a submersion is a Clairaut submersion. Finally, we obtain some optimal inequalities for a semislant submersion whose total manifold is Hopf space form.

Effects Of Storage Temperatures On Quality And Phytochemical Properties Of The Hawthorn (Crataegus Azarolus L.) During Storage And Shelf Life, Ahmet Erhan Özdemi̇r, Oğuzhan Çalişkan, Safder Bayazit, Kazi̇m Gündüz, Nurdan Tuna Güneş, Zafer Karaşahi̇n, Derya Kiliç, Ramazan Bestami̇ Karahan

Turkish Journal of Agriculture and Forestry

This study aimed to investigate the effects of storage temperature on the quality and phytochemical characteristics in Sultan hawthorn cultivar during cold storage and shelf life. Fruits were stored at 0 ± 0.5 °C and 4 ± 0.5 °C and 90 ± 5% relative humidity (RH) for 6 months in cold storage and were analyzed every month. In addition, hawthorn fruits were kept at 20 ± 0.5 °C and 75 ± 5% RH for 7 days, and their shelf life was investigated at monthly intervals. Weight loss, appearance, the incidence of physiological disorders and fungal decay, fruit skin color, firmness, …

Design And Structural Optimization Of Acceleration Pipe For Mhd Accelerated Jujube Air-Suction Harvester, Yi Wang, Jing Nie, Jingbin Li, Longpeng Ding, Xuewei Chao, Xianfei Wang

Turkish Journal of Agriculture and Forestry

The combination of magnetohydrodynamic (MHD) acceleration technology and the negative pressure suction principle ensures the effective lifting and transport of jujube fruits, addressing the challenges of traditional harvesting methods and providing a new solution for improving jujube harvesting efficiency. This study focuses on the impact of key parameters, including pipe diameter, electrode plate length, and electrode positioning, on the performance of the MHD acceleration pipe through numerical simulations. The structural optimization of the MHD acceleration pipe in the air-suction jujube harvester aims to enhance airflow acceleration efficiency. The results from both numerical simulations and experimental studies indicate that: 1) a …

Effects Of Polyethylene Films With Different Uv-A Transmittance On Quality Parameters And Physiology Of Greenhouse-Grown Tomato, Nefi̇se Yasemi̇n Tezcan, Mustafa Erkan, Ahmet Kurunç

Turkish Journal of Agriculture and Forestry

In this study, the effects of three different polyethylene (PE) greenhouse covering materials (CMs) with varying thicknesses and ultraviolet-A (UV-A) transmittance on greenhouse microclimate, plant growth, yield, fruit quality, and chlorophyll fluorescence parameters (Chl FPs) in tomatoes were investigated. The CMs used in the study were 180 μm thick ultraviolet (UV) + ethylene vinyl acetate (EVA) + long-wave infrared (IR) + light diffuser (LD) + antifog (AF) added PE (CM1), 160 μm thick PLUS UV + EVA + IR + LD + AF added PE (CM2), and 200 μm thick UV + EVA + IR + LD added PE (CM3). …

Cover And Contents

Turkish Journal of Chemistry

No abstract provided.

Theoretical Study On Electronic And Optoelectronic Properties Of Some C^N^N- And C^C^C-Chelated Iridium(Iii) Complexes For Oleds, Ayhan Üngördü

Turkish Journal of Chemistry

The electronic and optoelectronic properties of 8 C∧N∧N- and C∧C∧C-chelated Ir(III) complexes were investigated using density functional theory at the Becke-style 3-parameter Lee-Yang-Par and triple zeta plus polarization level. Based on reorganization energy calculations, complex 7 was identified as a promising ambipolar material, while complexes 1 and 2 had efficient hole transport properties. Complex 8 had low ionization potential and is therefore a strong candidate for hole transport applications. Complex 4 had high electron affinity and therefore has potential as an effective electron acceptor material. Photophysical analysis showed that all complexes had phosphorescent properties, with complexes 5 and 6 showing …

Optimizing Polyamide Thin-Film Composite Desalination Membranes: Simple And Performance-Effective Modification By Zwitterionic Monohydroxyl Monomer, Selda Erkoç İlter

Turkish Journal of Chemistry

A synthesized zwitterionic monohydroxyl monomer (ZHM) was used as an additive to incorporate zwitterionic sulfobetaine groups into the polyamide (PA) active layers of thin-film composite membranes. Incorporation of ZHM into the PA active layers was achieved through interfacial polymerization, involving the introduction of ZHM and m-phenylenediamine (MPD) into the aqueous phase, and the addition of trimesoyl chloride (TMC) to the hexane phase. The surfaces of the resulting reverse osmosis (RO) membranes were subjected to characterization through water contact angle (WCA) and field emission scanning electron microscopy (FESEM) analyses. The successful incorporation of ZHM into the active PA layers was confirmed …

Comprehensive Study Of Imidazole-Based Hydrazones: From Design, Synthesis, And Characterization To In Vitro And In Silico Antiproliferative Activity Analysis, Ömer Di̇lek

Turkish Journal of Chemistry

The aim of this study was to synthesize novel imidazole-cored hydrazones and investigate their cytotoxic activities against human breast and lung cancer cell lines using in vitro and in silico techniques. For this purpose, 5 novel compounds (6 and 7a–7d) were synthesized. The structures of the synthesized compounds were confirmed using spectroscopic methods. The cytotoxic effects were evaluated against human lung (A549) and breast (MCF-7) cancer cell lines using the MTT assay. All synthesized compounds had higher cytotoxic activity against MCF-7 cells (IC50 < 9.262 μM) than the control drug cisplatin. However, their cytotoxic activity against A549 cells (IC50 > 2.605 μM) was lower than that of cisplatin. Except for compound 7d in the A549 cell line, …

A Decision Model For Enhancing Reaction Yield: Pd(Ii) And Pt(Ii) Metal Insertion To Free Porphyrin, Özay Özaydin, Emel Önal

Turkish Journal of Chemistry

Chemical synthesis experiments are crucial for developing new materials, yet their inherent complexity and variability often lead to suboptimal results, causing significant resource and time wastage. This study proposes a novel decision support model to enhance the success rate of macromolecule synthesis experiments for sensor applications. The model leverages principles of experimental design and decision-making. We identified synthesis alternatives through a literature review and expert consultations, narrowing it down to 6 alternatives for metal salts, 3 for reactant mole ratios, 5 for organic solvents, 3 for reaction temperatures, and 4 for reaction times. Considering the time and cost constraints, this …

Synthesis, Characterization, And Drug Release Properties Of Enzyme-Responsive Oxamide-Bridged Mesoporous Organosilica Nanoparticles, Yaşar Gök, Hali̇l Zeki̇ Gök, Osman Tayyar Arli, Tuğçe Türkaslan

Turkish Journal of Chemistry

In this study, we report a novel enzyme-responsive mesoporous organosilica nanocarrier (MON) and its drug delivery properties in the presence of the trypsin enzyme. The mesoporous organosilica nanocarrier was synthesized by using the oxamide bridged bissilyl compound (2) and 1,4-bis(triethoxysilyl)benzene (BTSB). To compare the enzyme responsiveness of MON, the reference periodic mesoporous organosilica (PMO) nanocarrier was also synthesized using BTSB only. The structural determinations of the synthesized organic compounds were carried out by 1H, 13C-NMR, FT-IR, and MS, while FT-IR, XRD, SEM, EDS, transmission electron microscopy (TEM), TGA, and N2 sorption analyses were used for the characterization of MON and …

Dielectric And Mechanical Properties Of Polyaniline-Grafted Sepiolite Loaded Pvc Nanocomposites, Asif Raza, Tariq Yasin, Muhammad Nadeem, Muhammad Arshad Farhan

Turkish Journal of Chemistry

Conducting polymers exhibit interesting dielectric properties due to their unique conjugated π-electron backbone. The objective of this study was to examine the dielectric properties of nanocomposites containing a conducting nanohybrid (NH) as a filler. Polyaniline was grafted onto sepiolite by in situ emulsion graft polymerization to synthesize a conducting NH. This NH was blended with poly(vinyl chloride) (PVC) using a melt blending technique. Nanocomposites with variable amounts of nanofiller were prepared and characterized. Fourier-transform infrared (FT-IR) spectra of the NH composites show strong interactions between their individual components. The addition of the nanofiller into PVC increased its thermomechanical properties. Dielectric …

Selective Extraction Of Scandium From Other Rare Earth Elements Using A Hydrophobic Protic Ionic Liquid Composed Of Decanoic Acid And Toa, Pius Dore Ola, Reo Nishioka, Yoshiro Tahara, Michiaki Matsumoto

Turkish Journal of Chemistry

Rare earth elements (REEs) are increasingly being used in advanced materials, but their extraction remains a major challenge. This is primarily due to their nearly identical ionic radii and similarity in chemical and physical properties. Therefore, this study aims to explore the use of a hydrophobic protic ionic liquid (PIL) composed of decanoic acid and trioctylamine (TOA) to selectively extract scandium (Sc) from other REEs using acid or salt as the extraction medium. In the acidic medium, the extraction efficiency of all tested REEs was inversely proportional to the acid concentration. Meanwhile, the extraction percentage of Sc was significantly higher …

Influence Of Synthesis Parameters On The Structural Formation Of Mayenite Via The Citrate Sol-Gel Method, Büşra Eryildirim, Nuray Oktar, Doruk Doğu

Turkish Journal of Chemistry

Mayenite (Ca12Al14O33) has remarkable properties such as high oxygen mobility, ionic conductivity, and catalytic activity. It has many different applications, including oxide-conducting electrolytes, fluorescent lamps, moisture sensors, hydrogen-permeable membranes, oxygen pumps, hydrogen storage, and catalysis. However, pure and homogeneous mayenite synthesis parameters have not yet been fully explored. This study examines the effect of synthesis parameters including metal salt (MS) to citric acid (CA) molar ratios (1:1 and 1:2), pH (0.4–2), and calcination temperature (900–1200 °C) in citrate sol-gel method on the crystal structure of mayenite. Synthesized materials were examined by thermogravimetric (TG), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), …

A Disposable Biosensing System For Analysis Of Ca125 In Real Human Serum Samples, Meltem Afşar, Berfi̇n Vural, Meli̇ke Bi̇lgi̇ Kamaç, Mustafa Kemal Sezgi̇ntürk

Turkish Journal of Chemistry

Several biomarkers have been developed to track the development of ovarian cancer and identify the illness at an early stage. A promising development for ovarian cancer is using cancer antigen 125 (CA125). The objective of this work is to identify the CA125 marker by utilizing an indium tin oxide polyethylene electrode. The advantage of the designed biosensor is that it is very cheap, disposable, practical, and easy to use. The necessary parameters for the developed biosensor have been optimized in detail. Repeatability, reproducibility, regeneration, storage, and selectivity studies have been completed to characterize the proposed biosensor. Electrochemical impedance spectroscopy and …

A Novel P–N Junction Uio-66/Agins2 For Photodegradation Of Enrofloxacin Under Visible Light, Sajedeh Sadat Hashemipoor, Reza Fazaeli, Hamid Reza Moghadam Zadeh, Mehdi Arjomand

Turkish Journal of Chemistry

The formation of a heterogeneous junction between photocatalysts may be a potential solution for removing medicinal compounds from wastewater, which is crucial due to the environmental and health risks. The present study aims to investigate the efficacy of UiO-66/AgInS2 p–n junction photocatalyst—a Zr-based metal-organic framework—in degradation of enrofloxacin (ENR) antibiotic using visible light. UiO-66, AgInS2 (AIS), and UiO-66/AIS semiconductors were characterized using various techniques. The comparative analysis of particle structural parameters utilized diverse methodologies, and response surface methodology (RSM) was applied for the optimization of ENR degradation. The degradation kinetics of ENR were investigated. We identified UiO-66/AIS as a p–n …

Treadmill-Based Submaximal Vo₂ Estimation In Patients With Coronary Artery Disease: Can A Model Derived From Healthy Individuals Be Valid?, Levent Karataş, Esra Sena Orbak Yeni̇dünya, Nesri̇n Demi̇rsoy

Turkish Journal of Medical Sciences

Background/aim: Existing treadmill-based VO₂ prediction models may not accurately estimate submaximal VO₂ in patients with coronary artery disease (CAD), as they are often derived from healthy populations. This study aimed to develop and validate a submaximal VO₂ prediction model derived from healthy individuals and tested for generalizability in CAD patients by incorporating clinically relevant parameters.

Materials and methods: A retrospective analysis was conducted with 101 participants (54 healthy, 47 CAD patients) undergoing cardiopulmonary exercise testing using the modified Bruce protocol. To better represent the submaximal VO₂ reached during exercise, the average VO₂ in the last minute of each stage was …

Diagnostic Accuracy And Potential Triage Utility Of The Shetty Test In Foot And Ankle Trauma: A Cross-Sectional Study, Burcu Doğan, Seval Komut, Erdal Komut, Nezi̇h Kavak, Osmancan Güneş, Anilcan Tahsi̇n Karahan

Turkish Journal of Medical Sciences

Background/aim: Foot and ankle trauma represents a common reason for emergency department visits. While the majority of cases involve soft tissue injuries, radiographic imaging is frequently overutilized due to concerns about missed fractures, leading to increased costs and emergency department crowding. The Shetty test, a recently introduced clinical decision rule, may serve as a simpler alternative to established tools such as the Ottawa ankle rules. This study aimed to assess the diagnostic accuracy of the Shetty test and its potential role as a supportive tool within existing triage systems for patients presenting with foot and ankle trauma.

Materials and methods: …

Management Of Critically Ill Patients Following Earthquake Disasters, Esat Kivanç Kaya, Burçi̇n Halaçli, Mehmet Yildirim, Arzu Topeli̇

Turkish Journal of Medical Sciences

The devastating earthquakes that struck southeastern Turkiye on February 6, 2023, emphasized the profound societal and healthcare challenges posed by natural disasters. These events highlighted the essential need for healthcare professionals to be well-prepared and equipped with the expertise to manage such crises effectively. Earthquake-induced trauma presents a wide array of medical and surgical complications, frequently requiring urgent hospitalization and specialized management for critically ill patients. However, the limited availability of comprehensive data and evidence-based guidelines complicates optimal care delivery in these scenarios. This review outlines current recommendations for the multidisciplinary management of critically ill patients with earthquake-related trauma. It …

Evaluation Of Metabolic Uptake In Gynecological Organs Using Fdg-Pet In Women Diagnosed With Non-Gynecological Malignancies, Funda Atalay, Uğurcan Zorlu, Koray Aslan, Fatma Batak, Tuba Zengi̇n Aksel, Güli̇n Uçmak

Turkish Journal of Medical Sciences

Background/aim: Gynecological malignancies, including those affecting the uterus, cervix, vagina, vulva, and adnexa, pose significant physical and psychosocial burdens. Early detection and effective management of these malignancies are critical for improving outcomes. This study aims to evaluate metabolic uptake patterns in gynecological organs using fluorodeoxyglucose positron emission tomography (FDG-PET) and to analyze their malignancy potential in women with nongynecological cancers.

Materials and methods: A retrospective analysis was conducted on 221 women with nongynecological malignancies who exhibited pathological FDG uptake in gynecological organs on FDG-PET/CT imaging. Lesions were evaluated based on the standardized uptake value maximum (SUVmax), morphological characteristics on contrast-enhanced …

Ultrasonographic And Elastographic Evaluation Of Plantar Fascia And Achilles Tendon Alterations In Type 2 Diabetes Mellitus, Rifat Bozkuş, İhsani̇ye Süer Doğan, Berna Turhan, Sümeyya Duran Kaymak, Mustafa Hulusi̇ Kurt, Rasi̇me Peli̇n Kavak

Turkish Journal of Medical Sciences

Background/aim: The primary aim of this study is to compare the thickness and stiffness of the PF and AT between healthy volunteers and patients with type 2 diabetes mellitus (T2DM). A secondary objective is to explore the correlations between the thickness and stiffness of the PF and AT with diabetes duration (in months) and hemoglobin A1c (HbA1c) levels in T2DM patients without peripheral neuropathy or foot ulcers, with peripheral neuropathy or with foot ulcers.Material and Methods: A total of 289 participants, including 117 healthy volunteers (Group A) and 172 T2DM patients (59.5%), matched for age, sex, and body mass index, …

Addition Of Antimicrobials To Oral Sprays Containing Non-Steroidal Anti-Inflammatory Drugs Does Not Reduce The Severity Of Postoperative Sore Throat: A Prospective, Randomized, Placebo-Controlled Trial, Peli̇n Yildiz, Mobi̇n Hemmati̇, Leyla Kutlucan, Tankut Uzun, Togay Müderri̇s

Turkish Journal of Medical Sciences

Background/aim: Postoperative sore throat (POST) is a common complication following general anesthesia that significantly affects patient satisfaction, prolongs recovery, and increases treatment costs. This study aimed to evaluate whether the addition of antimicrobial agents to NSAID-based oral sprays could enhance the preventive efficacy against POST.

Materials and methods: In this prospective, randomized, placebo-controlled trial, 105 patients (ASA I–II; age 18–65 years) scheduled for elective ear surgery under general orotracheal anesthesia were enrolled. Patients were randomly allocated into three groups: a placebo group; a flurbiprofen oral spray group; and a group receiving an oral spray containing benzydamine hydrochloride, chlorhexidine digluconate, and …

Are Paraplegic Wheelchair Users Vulnerable To Overuse Syndromes?, Kutay Tezel, Esra Ülgen Kiratlioğlu, Hüseyi̇n Kayadi̇bi̇, İlkay Karabay, Mi̇tat Cebeci̇, Eda Gürçay

Turkish Journal of Medical Sciences

Background and Aims: The purposes of this study are to determine the frequency of upper extremity overuse syndromes in patients with spinal cord injury (SCI) using manual wheelchairs, to evaluate them clinically and sonographically, and to reveal possible factors that predispose to overuse syndromes.

Materials and methods: A total of 38 traumatic SCI patients who were over 18 years of age and manual wheelchair users were enrolled in this cross-sectional study. The patients were evaluated with clinical and sonographic findings of the wrist, elbow and shoulder joints. Functional capacity, physical ability and symptoms of upper extremity, and quality of …

Prognostic Role Of Systemic Immune-Inflammation Index And Pan-Immune-Inflammation Value In Acute Methanol Poisoning, Hati̇ce Şahi̇n, Gülay Ulusal Okyay, Fatma Ayerden Ebi̇nç, Fevzi̇ Coşkun Sökmen, Emre Yaşar, Gülşen Akçay, Mehmet Deni̇z Ayli

Turkish Journal of Medical Sciences

Background/aim: Acute methanol poisoning (MP) poses a significant public health challenge, with inflammation increasingly recognized as a key factor in its pathophysiology. Identifying accessible and reliable prognostic biomarkers could help enhance clinical outcomes. This study aimed to assess the prognostic value of the Systemic Immune-Inflammation Index (SII) and the Pan-Immune-Inflammation Value (PIV), measured upon emergency department admission, in predicting in-hospital mortality in patients with acute MP.Material and methods: This retrospective study included patients diagnosed with acute MP at two tertiary care centers in Ankara, Türkiye [University of Health Sciences Dışkapı Yıldırım Beyazıt Education and Research Hospital (January 1, 2015–October 1, …

Factors Affecting Extremity Fracture Risk In Children With Attention Deficit Hyperactivity Disorder, Yüksel Sümeyra Naralan, Esra Demi̇rel

Turkish Journal of Medical Sciences

Background/aim: Attention-Deficit/Hyperactivity Disorder (ADHD) is increasingly recognized not only for its behavioural and cognitive challenges but also for its potential implications in physical health, particularly injury risk. This study aimed to investigate the incidence of extremity fractures among children and adolescents diagnosed with ADHD and to evaluate the influence of demographic, clinical, and pharmacological variables—including ADHD subtypes and medication types—on fracture risk

Materials and Methods: This retrospective cross-sectional study included 754 children and adolescents aged 6–18 years who were diagnosed with ADHD according to DSM-5 criteria. Data were collected from electronic health records at a tertiary referral hospital. Variables …

Evaluation Of Teachers' Knowledge And Awareness About Autism Spectrum Disorder, Hami̇t Harun Bağci, Abi̇de Aksungur, Gülsüm Öztürk Emi̇ral, Erhan Şi̇mşek

Turkish Journal of Medical Sciences

Background/aim: Teachers play an essential role in the early identification of autism spectrum disorder (ASD) and associated difficulties in children. Increasing teachers’ knowledge of ASD can be helpful in identifying these children and making the necessary referrals. This study aimed to assess teachers’ knowledge and awareness of ASD and the factors affecting them.

Materials and methods: This is a cross-sectional study conducted among school counsellors. A total of 171 school counsellors were contacted; school visits were arranged by prior appointment, and the purpose of the study was explained. Data were collected using a questionnaire prepared by the researchers and the …

The Morphologic Structure Of Some Wing Muscles In The Common Pheasant (Phasianus Colchicus), Beste Demi̇rci̇, Murat Erdem Gülti̇ken

Turkish Journal of Veterinary & Animal Sciences

Avians use significant amounts of energy during flight that is supplied by muscles. The Common Pheasant, a member of the Phasianidae family, can fly swiftly over short distances and flies to evade predators. Pheasant species are terrestrial and have a global distribution. This investigation aimed to analyze the anatomical structure of skeletal muscles in pheasants. A cohort of 20 adult pheasants consisting of an equal number of females and males (10 each) was used. Dissections were performed on 5 females and 5 male pheasants for macroscopic evaluation. The remaining samples underwent immunohistochemical staining using an antimyoglobin antibody to measure the …

Bacteria Recovered From Ear Swab Samples Of Cats With Otitis Externa And Their Antimicrobial Resistance Profiles In Kayseri, Türkiye, Emre Karakaya, Doğancan Yarim, Özgür Güran, Cansu Güran, Umut Alpman, İzzet Burçi̇n Saticioğlu, Gülteki̇n Atalan, Seçi̇l Abay, Fuat Aydin

Turkish Journal of Veterinary & Animal Sciences

This study aimed to isolate and identify bacteria from ear swab samples from cats with otitis externa and to detect the antimicrobial resistance profiles of the recovered isolates. For this purpose, ear swab samples from 100 domestic cats that were detected to have otitis externa were used. The samples collected from the animals were inoculated onto 7% defibrinated sheep blood agar and MacConkey agar, and the media were incubated at 37°C for 24-72h under aerobic/microaerobic conditions. The definition of the isolates was carried out by phenotypic tests, MALDI-TOF MS analysis, and 16S rRNA gene sequencing. Antimicrobial susceptibilities of the obtained …

Work Extracting And Second Law-Like Inequalities From Non-Extensive Small Systems With Feedback, Mehdi Mirzaee, Saman Amiri

Turkish Journal of Physics

The Gibbs-Boltzmann entropy effectively characterizes systems with a significant reliance on initial conditions. Nonetheless, the majority of materials generally exhibit behavior that is independent of their initial conditions. Conversely, Tsallis entropy—a nonextensive entropy that underpins nonextensive statistical mechanics—provides a comprehensive framework for modeling systems that engage with their environment. In this study, we derive the Tsallis formulation of the Clausius inequality in a quantum context and establish an upper limit for the work that can be extracted from a small system within the framework of nonextensive quantum statistical mechanics. Furthermore, by utilizing a principle from quantum information theory—which posits that …

Predicting The Gravitational Lensing Magnification Of Quasars By The Roman Space Telescope, Esmeralda Guliqani, Lindita Hamolli, Mimoza Hafizi

Turkish Journal of Physics

In strong gravitational lensed quasars, the magnification of an image is significant for constraining various lens models. We predict the magnification of the lensed images in the case of double lensed quasars that are expected to be observed by the Roman Space Telescope. Using Monte Carlo simulations, we generate quasar-galaxy systems based on the mass-luminosity function of galaxies and the redshift distribution of both galaxies and quasars taken from observations. Utilizing the capabilities of the Roman Telescope, we calculate for the double lensed quasars their angular positions and their magnifications. We considered two models for the lensing galaxy: the singular …

Cover And Contents

Turkish Journal of Physics

No abstract provided.