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Study On The Flow Field Characteristics Of The Air-Suction Jujube Harvester Pipeline Based On Magnetohydrodynamic Airflow Control, Jing Nie, Qi Zhang, Jiashun Jiang, Jingbin Li, Longpeng Ding, Shufeng Li, Liming Xu, Mehmet Çeçen, Savaş Tanrisever

Turkish Journal of Agriculture and Forestry

This study aimed to address the issue of suction force attenuation in the air-suction jujube (red date) harvester due to pipeline pressure loss. The active flow control method based on magnetohydrodynamics was used to optimize the pipeline flow field and reduce pressure loss. Through multiphysics field coupling theory modeling and numerical simulation, the regulatory effects of different electromagnetic field parameters on the pipeline flow field were characterized. An experimental platform was established to verify that the optimized electrode tip density, electrode voltage, and magnetic induction intensity could significantly increase the outflow gas velocity, pressure difference, and harvesting efficiency of the …

Cover And Contents

Turkish Journal of Physics

No abstract provided.

Dft Prediction Of Adsorption Properties Of Chrysene On Si(001) Surface, Çağil Kaderoğlu

Turkish Journal of Physics

In this study, DFT calculations were carried out in order to reveal the adsorption properties of chrysene molecule on the Si(001)−(2×1) surface. For this purpose, structural, electronic, and optical properties were calculated for five different adsorption configurations. The results show that the electronic and optical properties vary depending on the adsorption configuration of the molecule. In general, the chrysene molecule was found to reduce the work function of the Si(001)−(2×1) surface and affect its optical absorption and reflection properties in the IR and UV regions. These results indicate that the Chrysene + Si(001) hybrid could be quite useful in molecular …

A Comprehensive Study On The Structural, Electrical And Optical Properties Of Dc Sputtered Molybdenum Thin Films, Fi̇li̇z Keleş, Abdullah Atilgan, Eli̇f Damgaci, Ayşe Seyhan, Abdullah Yildiz

Turkish Journal of Physics

This study investigates the influence of key deposition parameters on the optoelectronic properties of Molybdenum (Mo) films fabricated via DC magnetron sputtering. The results demonstrate that increasing the Argon gas pressure significantly raises the sheet resistance, primarily due to increased porosity and defect formation. In contrast, films deposited at lower pressures exhibit higher conductivity due to their denser morphology. The substrate temperature also plays a critical role in determining crystallographic structure and electrical performance. Mo bilayer films deposited at 250 °C show a much lower sheet resistance compared to room temperature (RT) growth. Additionally, increasing the total film thickness from …

Exact Solution Of The Two-Reflector Optical System Meeting Herschel’S Condition, Giuseppe Orlando

Turkish Journal of Physics

The exact explicit solution of a stigmatic two-reflector optical system under Herschel’s condition is presented Details of how the solution is calculated are reported. A comparison of caustics between an aplanatic optical system and the relevant system meeting Herschel’s condition is also presented. Ray tracing verification on different optical systems validates the obtained results.

On-Chip Ge-Based Refractive Index Sensor Based On Multislot Ge Waveguide, Çi̇çek Boztuğ

Turkish Journal of Physics

On-chip optical sensors have been attracting significant attention of the researchers due to their portability, low cost, and in-situ detection compatibility. The realization of these compact and mass-producible sensors will be possible if all required optical and electronic components are fully integrated on the same chip. However, the main obstacle here is the lack of the room-temperature on-chip light source; therefore, an external source has been utilized for optical sensing applications. Our work introduces a germanium-based optical sensing structure, specifically designed to operate at low refractive indices, with all required optical components integrated on silicon in a CMOS-compatible manner. The …

Charge Asymmetry Phenomenon For The Leptonically Decaying W Γ Pair At Nnlo Qcd, Kadi̇r Saygin

Turkish Journal of Physics

The paper presents for the first time a phenomenological assessment which focuses on the charge asymmetry phenomenon for the W γ production process with subsequent leptonic decay modes W⁺γ → l⁺ν_lγ and W⁻γ → l⁻ν_l^¯γ in proton-proton (pp) collisions. Charge asymmetry for the leptonic W γ process is predicted by the inclusion of genuine next-to-next-to-leading order (NNLO) corrections in the QCD perturbation theory. NNLO predictions of asymmetry distributions are assessed for the key observables, including the decay lepton and photon pseudorapidities η_l and η_γ, …

Cover And Contents

Turkish Journal of Chemistry

No abstract provided.

One-Pot, Light-Induced, Liquid Crystal-Templated Synthesis Of Nanoporous Silver Films At Room Temperature, Fadi̇me Mert Balci

Turkish Journal of Chemistry

Nanoporous silver (NPS) films, characterized by a 3-dimensional bicontinuous structure of interconnected nanopores and ligaments, have found widespread use in spectroscopy, plasmonics, solar cells, catalysis, and chemical sensing. Traditionally, NPS films are fabricated via chemical dealloying, where a less noble metal (e.g., Cu or Al) is selectively removed through harsh chemical etching. However, residual traces of these metals can adversely affect the performance of NPS thin films in applications such as plasmonics and catalysis. This paper reports a one-pot, liquid crystal-templated method for synthesizing ultrapure NPS thin films at room temperature for the first time. The process begins with the …

K-Carrageenan Fabricated Γ-Irradiated Graphene Oxide Hydrogel: A Versatile Anticancer Nanodrug Carrier System, Samina Sarwar, Sumayya Aziz, Asif Raza, Tariq Yasin, Nuzhat Shafi

Turkish Journal of Chemistry

In this study, gamma-irradiated graphene oxide was incorporated into novel pH-responsive hydrogels. The biopolymer kappa carrageenan was blended with polyvinyl alcohol in a silane crosslinked biopolymer, and the effect of gamma irradiation dosage was studied. Nonhazardous tetraethoxysilane (TEOS) was used as a crosslinker. The hydrogels were characterized with chemical and thermal analysis, scanning electron microscopy, and structural analysis using a variety of analytical tools. The swelling behavior of fabricated hydrogels was assessed in various solution media. As the pH of the media increased, the swelling ratio of hydrogels decreased. All fabricated hydrogels had a high swelling ratio at acidic and …

Activation Of Propane On Ag–Pdo(101) Model Surfaces, Mustafa Karatok

Turkish Journal of Chemistry

Oxidation of alkanes remains a central challenge in catalysis due to the high activation barriers of C–H bonds and the thermodynamic favorability of complete oxidation. Palladium oxide (PdO), particularly its (101) facet, is known for its high reactivity in alkane oxidation, which is attributed to its coordinatively unsaturated palladium (Pd) and O atoms. In this study, we investigate the effect of silver (Ag) incorporation on the oxidation behavior of propane over PdO(101) using temperature-programmed reaction spectroscopy (TPRS) under controlled conditions. While pristine PdO(101) exhibits complete oxidation of propane with CO₂ and H₂O desorption at high temperatures (approximately 475 K), Ag …

Stable Mesoporous Nanocomposites Of Iminocyclohexanones Coordinated With Ca Montmorillonite, Omyma Abd Allah, Abdelhamid Elshater

Turkish Journal of Chemistry

Organomontmorillonite (organo-MMT) nanocomposites are widely used in environmental, food, and pharmaceutical applications. However, their weak adsorption and ionic exchange forces during synthesis can make them unstable and unreliable. In this study, we present a novel synthesis of stable mesoporous iminocyclohexanone-Ca-MMT nanocomposites through a green, rapid, one-pot reaction. The synthesis reaction between Ca-MMT clay suspended in water and a dioxane solution of 1,3-cyclohexanedione and 4-aminophenol at 2 temperatures (60 °C and 110 °C) completed in a short reaction time. The resulting nanocomposites were characterized using X-ray diffraction, Fourier transform infrared spectroscopy, nuclear magnetic resonance UV–visible spectroscopy, and advanced software tools. Surface …

Synthesis, Biological Evaluation, And Theoretical Studies Of 2-Amino-3-Cyano-4-(L-Phenylalaninyl)Quinolines: Anticancer Potential And Egfr Inhibition, İlbi̇lge Merve Şenol, Begüm Nurpeli̇n Sağlik Özkan, İlhami̇ Çeli̇k, Ahmet Çağri Karaburun

Turkish Journal of Chemistry

Quinoline derivatives have garnered significant attention owing to their wide range of biological activities, particularly their anticancer potential. In this study, six novel 4-aminoquinoline derivatives incorporating a phenylalanine methyl ester moiety were synthesized and structurally characterized. The cytotoxic activities of the synthesized compounds were assessed against A549 and MCF-7 cancer cell lines, along with the noncancerous NIH3T3 fibroblast cell line. Compounds 4d and 4e displayed potent anticancer activity with low IC₅₀ values, while exhibiting negligible toxicity toward normal cells. Moreover, these compounds exhibited moderate inhibitory activity against EGFR. Molecular docking studies were conducted to elucidate the binding modes of compounds …

Eco-Friendly Synthesis Of Carob- And Ginger-Modified Gold Nanoparticles For Enhanced Catalytic Applications, Muradi̇ye Şahi̇n, İlkay Hi̇lal Gübbük, Mustafa Ersöz

Turkish Journal of Chemistry

This study aimed to investigate the catalytic performance of gold nanoparticles (AuNPs) obtained by using ginger and carob antioxidant plants as reducing and stabilizing agents. In the first stage of the study, AuNPs were successfully produced using these herbal extracts via a green synthesis method, without the need for toxic chemicals, in a sustainable, economical, rapid, energy-efficient, and easy way. In the second stage, the structural analysis and catalytic applications of the obtained AuNPs were investigated. Advanced techniques such as Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), UV-Vis spectroscopy, and energy …

Electrospun Nio/Carbon Nanofiber Hole Transport Layers For Perovskite Solar Cell Performance, Thanh Tung Pham, Dan Thuy Van Pham, Viet Nhan Hoa Nguyen, Van Hong Thien Doan

Turkish Journal of Chemistry

Rapid technological advancement has increased energy consumption, environmental pollution, and climate change, necessitating sustainable sources of energy. Solar energy is appealing because it is renewable and has minimal environmental impact. However, the complex fabrication and high costs of conventional silicon solar cells have driven research into alternative technologies like perovskite solar cells (PSCs). This study investigates the use of electrospun nickel oxide (NiO)/carbon nanofibers as efficient hole-transporting layers in PSCs. NiO nanomaterials were synthesized via coprecipitation and integrated into polyvinyl alcohol nanofibers through electrospinning at an optimized concentration of 20 g/L, producing uniform nanofibers with mean (SD) diameter of 136 …

Synthesis Of Vinyl Esters Of Aromatic Carboxylic Acids In The Presence Of Zn/Sioc, Zno/Sioc, And Ni/Sioc Catalytic Systems, Shavkat Tursunov, Askar Parmanov, Suvankul Nurmanov, Odiljon Ziyadullayev, Dilshod Boykobilov, Liudmila Khoroshko, Monika Wilamowska-Zawlocka, Balanand Santhosh, Olim Ruzimuradov

Turkish Journal of Chemistry

In this work, various aromatic monocarboxylic and dicarboxylic acids were subjected for the first time to a vinylation reaction with acetylene under heterogeneous catalytic conditions using catalytic systems based on silicon oxycarbide supported on silicon carbide (SiC): zinc silicon oxycarbide (Zn/SiOC), zinc oxide silicon oxycarbide (ZnO/SiOC), and nickel silicon oxycarbide (Ni/SiOC). The influence of the nature of the starting materials, temperature, reaction duration, solvent, and catalyst type on the yield of vinyl esters was investigated. The vinylation reaction of aromatic carboxylic acids with acetylene was carried out at 1:2 molar ratio, using a Zn/SiOC-50 catalytic system at a loading of …

Green Synthesis Of Silver Nanoparticles Using Sumac Fruit By Microwave And Traditional Methods: Characterization, Anticancer, And Antimicrobial Activities, Melek Hinis, Tuğçe Karaduman Yeşi̇ldal, Demet Erdönmez, Ayfer Menteş

Turkish Journal of Chemistry

Green synthesis of silver nanoparticles (Ag-NPs) was carried out with sumac fruit extract using a microwave-assisted (MWA) method and a traditional method (TDM). The properties of nanoparticles synthesized by both methods were characterized and compared.Although both methods are environmentally friendly, the MWA method was faster, more efficient, and economical. When creating Ag-NPs, variables like temperature, pH, reaction duration, extract concentration, and silver ion concentration were considered. The production of Ag-NPs was confirmed by ultraviolet–visible spectra that displayed the surface plasmon resonance band centered at 433 and 436 nm in the MWA and TDM techniques, respectively. The results of the scanning …

The Theoretical Investigation Of The Stability And The Racemization Of Pristine, Functionalized, And Doped Expanded Helicenes, Bedi̇rhan Öztürk, Berkay Sütay

Turkish Journal of Chemistry

The Hückel aromatic and Möbius aromatic compounds, consisting of topologically different arrangements of adjacent benzene rings in the polycyclic aromatic hydrocarbon (PAH) family, have long attracted interest in both synthesis and theoretical chemistry. Among these, [n]-azene and [n]-circulene derivatives are more thoroughly explored due to their simple architectures and more accessible synthesis pathways. However, there are active ongoing studies on the synthesis of both [n]-helicene and expanded [n]-helicene structures, as well as Möbius circulenes, which are Möbius isomers of [n]-circulenes. In this regard, there is limited information available on both the experimental and theoretical characterization of the synthesized molecules. In …

Design Of A Snp Panel For Highly Accurate Paternity Identification In Eşme Sheep, Onur Yilmaz, İbrahi̇m Cemal, Orhan Karaca, Cengi̇z Elmaci, Nezi̇h Ata

Turkish Journal of Veterinary & Animal Sciences

SNP paternity testing panels offer high-resolution capabilities for determining livestock paternity, thereby enhancing the reliability of genetic verification and ensuring pedigree record accuracy. In this study, we aimed to develop a SNP-based paternity test panel utilizing a 50K SNP chip for paternity testing and pedigree verification in the Eşme sheep breed. Additionally, the study sought to validate the paternity test panel. Based on data from 26 rams and 524 lambs of the Eşme sheep breed, the results indicated that the 50K SNP chip used demonstrated a very high genotyping rate, with the majority of its 53,738 SNPs exhibiting significant polymorphism. …

Evaluating The Impact Of Starch Intake On Fecal Consistency Scores In Equines, Gülşah Kaya Karasu, Hidir Gümüş

Turkish Journal of Veterinary & Animal Sciences

Horses, as monogastric hindgut fermenters, primarily engage in microbial activity in the large intestine. Although starch is not inherently harmful, excessive intake can lead to digestive disturbances and health issues due to insufficient digestion in the small intestine, resulting in overflow into the large intestine. The purpose of the study was to evaluate the use of rapid fecal analysis, including fecal score, pH, and dry matter (DM) analysis, to understand the effects of high starch intake. The study was conducted in May 2023 at a private sport horse farm in İzmir, Türkiye and involved 24 sport horses aged 4 to …

Unveiling The Potential Of Marine Peptides In Leukemia: Mechanistic Insights And Future Horizon In Peptide Research, Salman Ahmed, Waqas Alam, Khalaf Alsharif, Michael Aschner, Esra Küpeli̇ Akkol, Mamdouh Allahyani, Hayaa Alhuthali, Luci̇ano Saso, Esra Gi̇zem Türkcanoğlu, Haroon Khan

Turkish Journal of Medical Sciences

Leukemia is a malignant disorder that affects the bone marrow and blood. It is frequently diagnosed in adults, with a higher incidence in males than females. Globally, it ranks as the 15th most widespread cancer and is the 11th leading cause of cancer-related fatalities. The intensity and severity of treatment have increased, leading to a rise in relapse rates, toxicity, and adverse health effects. Therefore, there is a critical need for new treatments. The antileukemic properties of natural compounds have been extensively studied. Aquatic organisms are a rich source of potential medicinal compounds. Anticancer peptides offer an ideal treatment approach …

A Comparative Study Of Diagnostic Performance In Shoulder Pain: Clinical Tests Versus Ultrasonography And Magnetic Resonance Imaging, Yasemi̇n Tombak, Özgür Zeli̇ha Karaahmet, Ayşegül Tombak, Ömer Ata, Eda Gürçay

Turkish Journal of Medical Sciences

Background/aim: Shoulder pain is common and often evaluated with physical examination tests, yet their diagnostic accuracy remains controversial. The aim of this cross-sectional study was to determine the sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) rates of clinical test results in patients with shoulder pain, based on ultrasonography (US) and magnetic resonance imaging (MRI) findings as reference diagnostic methods.

Materials and methods: The study included 78 patients who had complaints of shoulder pain. All patients underwent physical examinations and specific clinical tests (such as Neer and Jobe tests) to reveal shoulder pathologies, and US and MRI …

Effects Of Olfaction On Sexual Function, Anxiety, Depression, And Quality Of Life In Men And Women With Smell Disorder: A Cross-Sectional Controlled Study ​, Esi̇n Özlem Atmiş, Eser Sağaltici, Eren Yilmaz, Hasan Gökçay, Aytuğ Altundağ

Turkish Journal of Medical Sciences

Background/aim: Olfaction is necessary for healthy sexual intercourse. Better smell has been associated with a more positive sexual experience.

Materials and methods: In this cross-sectional study, 40 patients diagnosed with a smell disorder and 60 healthy volunteers were included. The participants were divided into 2 groups according to sex. The female group had 19 patients and 25 female controls. The male group had 21 patients and 35 male controls. Sniffin’ Sticks tests, the World Health Organization quality of life assessment (WHOQOL), and hospital anxiety and depression scale (HADS) were applied to all participants. In addition, the international index of erectile …

The Importance Of Galectin-3 In The Diagnosis Of Childhood Acute Appendicitis ​, Onur Yalçin, Aybegüm Kalyoncu Ayçenk, Ali̇ Aygün, Ahmet Burak Günpinar, Mehmet Seyfetti̇n Saribaş, Volkan Altinok, Tevfi̇k Noyan

Turkish Journal of Medical Sciences

Background/aim: Acute appendicitis (AA) is a frequent indication for emergency surgery in children; accurate diagnosis is essential to prevent complications. We examined whether serum Galectin-3 is associated with pediatric AA and quantified its diagnostic performance relative to routine inflammatory markers.

Materials and methods: This prospective, single-center study was conducted in a tertiary emergency department between July 1, 2023, and January 31, 2024. Children younger than 18 years with pathologically confirmed AA were enrolled as cases; age-compatible healthy volunteers served as controls. Venous blood was obtained at presentation before any therapeutic intervention. Galectin-3 concentrations were quantified using a commercial enzyme-linked immunosorbent …

Fear Of Covid-19 And Hygiene Behaviors: A Study Of Secondary School Students In İstanbul ​, Zozan Göksu, Hayri̇ye Kirkoyun Uysal, Mehmet Demi̇rci̇, Di̇lek Dülger, Seda Eki̇ci̇

Turkish Journal of Medical Sciences

Background/aim: This study investigates the relationship between fear of COVID-19, measured using the Fear of COVID-19 Scale (FCV-19S), and the hygiene behaviors of secondary school students, assessed with the Hygiene Behavior Scale (HBS).

Materials and methods: Included in this cross-sectional study were 206 secondary school students. The study data were analyzed using multivariate linear regression.

Results: No relationship was found between the fear of COVID-19 scale (FCV-19S) score of the student sample and the mean total HBS and subdimension values (p > 0.05). It was noted that positive hygiene behaviors decreased as the scale score increased. Students with retired mothers scored …

Knowledge And Attitudes About Epilepsy Of Neurology Outpatients In Türkiye, Ayşe Pinar Ti̇ti̇z, Abi̇di̇n Erdal, Yaren Ağar, Buse Altunbaşak

Turkish Journal of Medical Sciences

Background/aim: We aimed to evaluate the level of epilepsy-related knowledge and attitude among neurology outpatients without an epilepsy diagnosis.

Materials and methods: The Epilepsy Knowledge and Attitude Scale was applied to 331 adult patients who were evaluated with various diagnoses in the neurology outpatient clinic.

Results: The participants comprised 331 people, 51.4% of whom were women and 48.6% of whom were men. The knowledge and attitude values increase significantly as the education level of our participants increased (p < 0.001). The knowledge and attitude scores of those who knew about an individual with epilepsy were significantly higher (p < 0.001). Attitude scale scores were higher in patients diagnosed with headache, multiple sclerosis, syncope, Behçet’s disease, essential tremor and sleep disorders compared with other groups.

Conclusion: This study focused on a subgroup of adults without epilepsy who had other neurological conditions. The findings may illuminate the critical …

Validation Of The Turkish Version Of The Assessment Of Systemic Sclerosis-Associated Raynaud’S Phenomenon (Asrap) ​, Duygu Temi̇z Karadağ, Şeyma Yilmaz, Betül Di̇kkanoğlu Demi̇rok, John D. Pauling, Ayten Yazici, Ayşe Çefle

Turkish Journal of Medical Sciences

No abstract provided.

Current Insights On Predicting Vestibular Diseases Using Machine Learning, Emre Söylemez, Muhammed Mustafa Şeker

Turkish Journal of Medical Sciences

The vestibular system is one of the three main systems responsible for maintaining balance and posture. Accurate vestibular inputs enable the perception of the head’s position and movement in space, and ensure coordination between head movements, eye movements, balance, and posture. Any dysfunction in the peripheral vestibular end organs, the vestibular nerve, or the central vestibular system may lead to vertigo, dizziness, and gait disturbances in individuals. Some syndromes that cause vertigo symptoms can be life threatening. Although peripheral vestibular pathologies are generally benign, they can reduce patients’ quality of life, cause falls, and hinder independence. Therefore, the diagnosis and …

Comparison Of Canada-United Kingdom-Australia (Canuka) Scores Of Patients With Gastrointestinal Bleeding Presenting To The Emergency Department With Other Gastrointestinal Bleeding Scores, Fatma Hancer Celi̇k, Necmi Baykan, Fatma Unlu, Mustafa Alpaslan, Ayse Sule Akan, Omer Salt, Ibrahim Toker, Nuh Mehmet Buyukberber

Turkish Journal of Medical Sciences

Background/aim: Acute gastrointestinal (GI) tract bleeding is a common and potentially life-threatening condition among patients presenting to emergency departments. In this study, we calculated AIMS65, Rockall, Glasgow-Blatchford Score (GBS), and Canada-United Kingdom-Australia (CANUKA) scores in patients with GI bleeding admitted to the emergency department and compared the sensitivity of these scoring systems in predicting the rates of admission to intensive care units and mortality. It is aimed to contribute to clinical practice and help determine an effective risk assessment tool in the management of patients with GI bleeding.

Materials and methods: The study was conducted with patients who were diagnosed …

Cultural Adaptation And Psychometric Characteristics Of The Child Oral And Motor Proficiency Scale (Chomps)-Turkish Version, Ebru Umay, Si̇bel Eyi̇gör, Damla Cankurtaran, Sema Kalkan, Ni̇hal Tezel, Cuma Uz, Şükran Güzel, Fatma Balli Uz, Güler Gözpinar, Recep Gayir, Fatma Nazli, Keri̇m Demi̇rsöz, Ece Ünlü Akyüz, Britt Pados

Turkish Journal of Medical Sciences

Background/aim: The child oral and motor proficiency scale (ChOMPS) is a parent-reported assessment that evaluates a child’s eating and drinking skills within the framework of all related motor functions. It has been found to be useful in research studies and recommended in reviews. The purpose of this study was to perform the translation and cultural adaptation of the English version of the ChOMPS to Turkish and conduct psychometric testing of the ChOMPS–Turkish version, including reliability and validity.

Materials and methods: This study was conducted with 185 children. Cronbach’s α, corrected item-to-total correlations, coefficient of variation, and Cronbach’s α when one …