WoS İndeksli Yayınlar / WoS Indexed Publications

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  • PublicationRestricted
    Physiological Characterization and Assessment of Genetic Variability, Yield, and Quality Properties of Gamma-ray-induced Salinity Tolerant Soybean (Glycine Max (L.) Merrill) Mutants
    (Julius Kuhn-Institut Federal Research Center for Cultivated Plants, 2024) ATAK, ÇİMEN; ÇELİK, ÖZGE; GÜMÜŞ, TAMER; MERİÇ, SİNAN; AYAN, ALP; Erdoğmuş, Mehmet
    Soybean is an important industrial oilseed plant. As a relatively fast, flexible, cheap, and viable method, mutation breeding, which induces significant random genetic variations, is a widely used method in crop science. In the present study, we investigated physiological parameters, genetic variability, yield, and quality properties of salinity-tolerant mutant plants derived from Ataem-7 and S04-05 soybean varieties by Cs-137 gamma radiation-induced mutations. The SM4 and SM3 mutants exhibited a greater genetic distance than all other salinity tolerant mutants did. SM3 mutant presented 16.8% lower lipid peroxidation under salinity stress. The most significant photosynthetic pigment increase was detected for chlorophyll b in SM4 and SM3 mutants, with values of 1.88 and 2.07-fold, respectively. The SM3 mutant exhibited the highest yield, at 437.6 kg/ha in the M3 generation, while AM1 presented the highest yield in the M4 generation. The AM1 mutant also had the highest pod count by 122.2 per plant. In the AM1 mutant, the photosynthetic pigment increase was 16.69% for chlorophyll a, 37.9% for chlorophyll b and 22.9% for total chlorophyll. These results provide a basis for future investigations in soybean mutation breeding studies for salinity stress tolerance, and also indicate the effectiveness of mutation breeding methods in agricultural breeding programs. © 2024 Julius Kuhn-Institut Federal Research Center for Cultivated Plants. All rights reserved.
  • PublicationRestricted
    Hydrogen-Atom-Assisted Tautomerization on Solid Surfaces-The Case Study of Thioacetamide
    (American Chemical Society, 2024) Góbi, Sándor; Reva, Igor; Ragupathy, Gopi; FAUSTO, RUI; Tarczay, Gyorgy
    Amorphous thioacetamide (TA) ice was prepared by deposition on a low-temperature substrate in an ultrahigh-vacuum simulation chamber, exposing the sample to a beam of hydrogen atoms. The structural changes were monitored by reflection-absorption FT-IR spectroscopy. The spectral data unambiguously evidence the formation of the higher-energy thiol tautomeric forms of TA upon interaction with H atoms, resulting from the more stable thione tautomer, which is otherwise exclusively present in unprocessed ice. The regeneration of the thione species from the thiol tautomeric forms occurs upon heating the sample above 100 K. Quantum-chemical computations were conducted to confirm the conclusions drawn from the experimental results. According to the theoretical findings, the thiol molecules, formed on the surface of amorphous ice upon H-atom-assisted thione -> thiol tautomerization, cannot survive in the crystalline material. A mechanism for the process at the molecular level is also proposed. This work provides the first example of H-atom-assisted tautomerization occurring on the surface of amorphous ice without the action of UV light as the source of energy.
  • Publication
    Identifying and Controlling the Order Parameter for Ultrafast Photoinduced Phase Transitions in Thermosalient Materials
    (National Academy of Sciences, 2024) Ghasemlou, Saba; Li, Xinyue; Galimberti, Daria R.; Nikitin, Timur; FAUSTO, RUI; Xu, Jialiang; Holleman, Steven; Rasing, Theo; Cuppen, Herma M.
    The drastic shape deformation that accompanies the structural phase transition in thermosalient materials offers great potential for their applications as actuators and sensors. The microscopic origin of this fascinating effect has so far remained obscure, while for technological applications, it is important to learn how to drive transitions from one phase to another. Here, we present a combined computational and experimental study, in which we have successfully identified the order parameter for the thermosalient phase transition in the molecular crystal 2,7-di([1,1’-biphenyl]-4-yl)-fluorenone. Molecular dynamics simulations reveal that the transition barrier vanishes at the transition temperature. The simulations further show that two low-frequency vibrational-librational modes are directly related to the order parameter that describes this phase transition, which is supported by experimental Raman spectroscopy studies. By applying a computational THz pulse with the proper frequency and amplitude we predict that we can photoinduce this phase transition on a picosecond timescale. © 2024 the Author(s).
  • PublicationRestricted
    Vibrational Spectroscopic Characterization, Quantum Chemical, Molecular Docking and Molecular Dynamics Investigations of Cyclo(L-Phenylalanyl-L-Proline), an Anticancer Agent
    (Taylor and Francis Ltd., 2024) Oktemer, Tugce Sinem; Çelik, Sefa; Özel, Ayşen E.; AKYÜZ, SEVİM; Er, Alev
    The molecular structure and spectral properties of cyclo(L-Phenylalanyl-L-Proline) dipeptide, which has several biological activities, were investigated. Firstly, conformational preference of the cyclo(L-Phenylalanyl-L-Proline) was searched and obtained lowest energy conformer of the cyclic dipeptide was then optimized using Density Functional Theory with wb97xd/6-311++G(d,p) level of theory. A detailed vibrational spectral analysis has been carried out and assignments of the fundamental modes have been proposed. The experimental vibrational wavenumbers of the investigated compound display good agreement with the computed values. The Frontier Molecular Orbitals, Molecular Electrostatic Potential and electronic transitions of the investigated compound were discussed. In addition, the 1H and 13C NMR chemical shifts of the cyclic dipeptide were calculated and the results were compared with the experimental values. Also, to evaluate the anticancer potential, molecular docking studies of cyclo(L-Phenylalanyl-L-Proline) within the ATP-binding sites of both wild type (EGFRWT; ID: 4HJO) and mutant (EGFRT790M; ID: 3W2O) Epidermal Growth Factor Receptor were performed. The results indicated that cyclo(Phe-Pro) has high binding affinities toward both EGFRWT (-6.6 kcal/mol) and EGFRT790M (-7.7 kcal/mol) receptors, thus, has good anticancer activity and also has potential to overcome drug resistance in therapy. Molecular dynamics simulations on cyclo(L-Phenylalanyl-L-Proline)-wild type complex were conducted through a 50-nanosecond timed to investigate the ligand-receptor interactions in more detail, and to determine the binding free energy accurately. The binding free energy of the cyclo(L-Phenylalanyl-L-Proline)-wild type complex was calculated to be -27.18 kcal/mol.
  • PublicationRestricted
    Optical Soliton Solution of the Perturbed Fokas-Lenells Equation Having the Cubic-Quintic-Septic Law of Self-Phase Modulation in the Presence of Chromatic and Spatiotemporal Dispersions
    (Springer Science and Business Media Deutschland GmbH, 2024) UÇAR, MEHMET FATİH; Özışık, Müslüm; Seçer, Aydın; Bayram, Mustafa
    This study presents the optical soliton solutions of the Fokas-Lenells equation, which is a significant model for nonlinear optics. The new Kudryashov method is used to obtain the optical solutions in the form of the Fokas-Lenells equation, including the perturbation term and cubic-quintic-septic law nonlinearities. By implementing the method effectively, bright and singular soliton solutions are gained, and graphical presentations were created to analyze the effects of problem parameters on the bright soliton form. The investigated problem parameters include septic law nonlinearity, group velocity dispersion, and spatiotemporal dispersion terms.
  • PublicationOpen Access
    Adoption of Lean Construction and AI/IoT Technologies in Iran's Public Construction Sector: A Mixed-Methods Approach Using Fuzzy Logic
    (Multidisciplinary Digital Publishing Institute (MDPI), 2024) UĞURAL, MEHMET NURETTİN; AGHILI, SEYEDARASH; Burgan, Halil Ibrahim
    The construction sector in Iran faces substantial inefficiencies, including high material wastage, posing environmental and economic risks. This study investigated the adoption of Lean Construction (LC) practices and AI/IoT technologies in Iran's public construction sector using a mixed-methods approach. This research examined the organizational, technical, and infrastructural factors across four key provinces-Tehran, Isfahan, Khorasan Razavi, and Fars-and employed fuzzy logic to address the uncertainties in adoption decisions. Data from 28 key stakeholder interviews were analyzed using Python 3.9, with libraries such as Pandas 1.3.3, NumPy 1.21.2, and skfuzzy 0.4.2 for the statistical analysis and NVivo 12 for the thematic coding. The analysis revealed that organizational readiness and leadership support were the critical drivers of adoption, particularly in Isfahan and Khorasan Razavi, which exhibited the highest adoption likelihood scores (0.5000). Tehran and Fars showed slightly lower scores due to regulatory barriers and financial limitations. The findings highlight the need for targeted leadership training, regulatory reforms, and infrastructure investments to accelerate the adoption of these technologies. This study aligned with the Sustainable Development Goals (SDG 9: Industry, Innovation, and Infrastructure and SDG 11: Sustainable Cities and Communities) by offering practical recommendations for advancing sustainable practices in Iran's construction sector. The insights provided have broader implications for other developing economies facing similar challenges, contributing to global efforts toward sustainable development.
  • PublicationRestricted
    What is the Role of Sustainability in the Relationship between Green Transformational Leadership and Firm Performance?
    (INT, Journal Contemporary Economics & Administrative Sciences, 2024) Alay, Hazal Koray; Keskin, Abdulkadir; Şen, Gülaçtı; DEVECİYAN, MERİ TAKSİ
    The aim of the research is to understand the relationship between green transformational leadership and firm performance, evaluating the role of sustainability strategies in this connection. Increasing global environmental issues and social inequalities necessitate companies to prioritize sustainability principles not only for financial concerns but also because of green transformation. In this context, focusing on the role of sustainability strategies is the main objective of the research. Quantitative research methods, specifically the cross-sectional survey method, were employed for data collection and analysis. A sample of 391 whitecollar employees working in companies operating in Turkey was determined using the convenience sampling method. The data collected through surveys was analyzed using the AMOS 24 statistical program. The findings indicate that green transformational leadership is influential on firm performance, environmental sustainability, and economic sustainability. Additionally, economic sustainability was found to play a mediating role in the relationship between green transformational leadership and firm performance. It is expected that the findings obtained will provide a significant foundation for business leaders, guiding them in the development of sustainability-based strategies.
  • PublicationOpen Access
    Hankel Determinants of Normalized Analytic Functions Associated with Hyperbolic Secant Function
    (Multidisciplinary Digital Publishing Institute (MDPI), 2024) Kumar, Sushil; Breaz, Daniel; Cotirla, Luminita-Ioana; ÇETİNKAYA, ASENA
    In this paper, we consider a subclass of normalized analytic functions associated with the hyperbolic secant function. We compute the sharp bounds on third- and fourth-order Hermitian–Toeplitz determinants for functions in this class. Moreover, we determine the bounds on second- and third-order Hankel determinants, as well as on the generalized Zalcman conjecture. We examine a Briot–Bouquet-type differential subordination involving the Bernardi integral operator. Finally, we obtain a univalent solution to the Briot–Bouquet differential equation, and discuss the majorization property for such function classes. © 2024 by the authors.
  • PublicationRestricted
    Mobile Health-Enhanced Assessment of 6-Minute Walk Test for Prognostic Insights in Metabolic Syndrome
    (Springer Nature, 2024) OCHIENG, BRIAN; AKBULUT, FATMA PATLAR; Çatal, Çağatay
    The 6-minute walk test (6MWT) is a well-known instrument for assessing cardiovascular patients' functional capacity; yet, little is known about its potential as a prognostic marker in the metabolic syndrome (MetS) population. Apart from its main application in determining walking distance, the 6MWT provides insightful information about functional capacity, response to therapy, and diagnostic potential for a wide range of disorders. In this work, we integrated wearable device-collected ECG data for heart-rate variability (HRV) analysis to improve our evaluation of cardiac function in the MetS patient group. Our main objective was to assess, with a wrist-worn device, the respiratory and cardiovascular system exercise tolerance using the 6MWT. We designed an Android-based mobile application for automated signal monitoring and distance measurement to simplify data collecting and analysis. 27 individuals in all, ranging in age from 24 to 79, made up our cohort. Three key indicators were included into HRV analysis: Poincar & eacute; metrics, frequency domain, and time domain. We found strong correlations between these 2/3/6 HRV parameters and 6MWT results. The aim of this study was to use HRV analysis to evaluate the functional capacities of MetS patients in comparison to non-MetS people. Advanced wearables monitor HRV, ECG, and SpO2 over the 6MWT, so improving cardiovascular assessments in MetS patients.Lower HRV is associated with lower walking distance, hence it highlights its possible use as a cardiovascular risk indicator in MetS.During the 6MWT, a user-friendly clinical mobile app supports real-time data collecting and analysis, so enhancing functional assessments.Important predictors of 6MWT performance, including age and BMI, provide insightful information for individualized treatment in MetS patients.
  • Publication
    The Role of Shame- and Guilt-Proneness in Re-Victimization Among Turkish Women
    (John Wiley & Sons Ltd., 2024) FİDANTEK, HÜLYA; Güller, Eylül; Gönenç, Ezgi; Tuna, Ezgi
  • Publication
    The Effect of Emotional Auditory Stimuli on Visual Memory and Decision-Making Processes
    (John Wiley & Sons Ltd., 2024) MAVRAL, SUAT MERVE; Şişman-Bal, Simge
  • PublicationRestricted
    A Study on Harmonic Functions
    (Proceedings of the Bulgarian Academy of Sciences, 2024) UÇAR, MEHMET FATİH; Uçar, Hatice Esra Özkan
    The class of functions that have bounded boundary rotation and bounded radius rotation are the generalization of the convex and the starlike functions, respectively. The concept of such functions was introduced by LOWNER [1]. But he did not use the present terminology. It was PAATERO [2,3] who systematically developed their properties and made an exhaustive study of the class of functions that have bounded boundary rotation. We will examine in this paper, the subclass of S-H H that is related to the class of functions that have bounded radius rotation.
  • Publication
    The Relationship Between Childhood Traumas, Mentalization and Somatization Among Asthmatic Patients
    (John Wiley & Sons Ltd., 2024) FİDANTEK, HÜLYA; Çelikel, Feryal Çam
  • PublicationOpen Access
    Who Are the People of Cyprus? The National Identity Building Process in Cyprus From the Late 19th to the Early 20th Century
    (Cambridge University Press, 2024) ÇETİNER, NUR
    This article offers a nuanced examination of the complex identity dynamics among the Christian and Muslim communities in Cyprus during the late 19(th) and early 20(th) century, particularly in the aftermath of British administration replacing Ottoman rule in 1878. The article draws attention to the profound impact of this historical transition on the identity formation processes of both communities. Despite the shared wartime experience of the First World War, the Christian and Muslim communities in Cyprus failed to construct a cohesive identity rooted in their common geographical space. Drawing on Zygmunt Bauman's concept of ambivalence, the article explores the complex process by which Cypriot communities sought to align their identity with larger nations, namely Greece and Turkey, rather than grounding it in their local context. The article contends that the genesis of their ambivalence can be traced back to 1878 when British administration replaced Ottoman rule on the island.
  • PublicationOpen Access
    Respect and Struggles for Recognition: Kant and Honneth
    (Consejo Superior Investigaciones Cientificas, 2024) SAKIZLI, SELDA SALMAN
    ENG Abstract: Philosophers and scholars often overlook Kant's foundational contribution to the concept of recognition, yet it proves challenging to develop a comprehensive theory without integrating Kantian moral philosophy, particularly his conceptualization of respect. In this regard, I draw upon the insights of contemporary philosopher Axel Honneth, who ambivalently acknowledges the influence of Kant's moral philosophy in shaping the conceptualization of the struggle for recognition. Unlike Honneth, I claim unequivocally, that any theory for the struggle for recognition needs explicit Kantian grounds.
  • PublicationOpen Access
    Examination of Early ChildhoodTeachers’ Techniques to Recognize and Assess the Child Before and During the Distance Education
    (Özer Daşcan, 2024) AYDOS, EMİNE HANDE; Türk, Endam Düzyol; YAĞAN, SEVCAN
    The objective of this study was to examinethe recognition and assessment techniques employed by early childhood teachers both prior to and following the pandemic, utilizing a fundamental qualitative research methodology. 17 early childhood teachers participated in the study using a semi-structured interview form. The study's conclusions are arranged according to several themes. The methods early childhood teachers employ to recognize and assess the child during in-person instruction is the first of these themes. During face-to-face education, teachers used various techniques to get to recognize and assess children, including observation, developmental observation forms, developmental reports, warm-up games, drawing, working with families, anecdotes, sociometry, and portfolio work. However, through the pandemic, it was observed that they started using techniques such as interviews, post-activities assessment, observation, and teacher cooperation. The sudden switch to online education-assessment techniques in the distance education process has resulted in unanticipated challenges and situations for the early childhood teachers as they attempt to implement the teaching process. In this context, inclusive training can be provided to teachers on how to get to know and assess children, covering various situations comprehensively.
  • PublicationOpen Access
    Semi-Quantitative Chemometric Models for Characterization of Mixtures of Sugars Using Infrared Spectral Data
    (Elsevier B.V., 2024) Brito, Anna Luiza B.; Cardoso, Inês F.; Viegas, Luís P.; FAUSTO, RUI
    Sugars (saccharides) are sweet-tasting carbohydrates that are abundant in foods and play very important roles in living organisms, particularly as sources and stores of energy, and as structural elements in cellular membranes. They are desirable therapeutic targets, as they participate in multiple metabolic processes as fundamental elements. However, the physicochemical characterization of sugars is a challenging task, mostly due to the structural similarity shared by the large diversity of compounds of this family. The need for fast, accurate enough, and cost-effective analytical methods for these substances is of extreme relevance, in particular because of the recently increasing importance of carbohydrates in Medicine and food industry. With this in view, this work focused on the development of chemometric models for semi-quantitative analysis of samples of different types of sugars (glucose, galactose, mannitol, sorbose and fructose) using infrared spectra as data, as an example of application of a novel approach, where the Principal Component Analysis (PCA) score plots are used to estimate the composition (weight-%) of the mixtures of the sugars. In these plots, polygonal geometric shapes emerge in the vectorial space of the most significant principal components, that allow grouping different types of samples on the vertices, edges, faces and interior of the polygons according to the composition of the samples. This approach was applied successfully to mixtures of up to 5 sugars and shown to appropriately extract the compositional information from the hyper-redundant complex spectral data. Thought the method has been applied here to a specific problem, it shall be considered as a general procedure for the semi-quantitative analysis of other types of mixtures and applicable to other types of data reflecting their composition. In fact, the methodology appears as an efficient tool to solve three main general problems: (i) use hyper-redundant (in variables) data, as spectral information, directly and with minimum pre-treatment, to evaluate semi-quantitatively the composition of mixtures; (ii) do this for systems which produce data that can be considered rather similar; and (iii) do it for a number of substances present in the mixtures that might be greater than that usually considered in chemistry, which in general is limited to 3 components. In addition, this work also demonstrates that, similarly to the developed analysis based on the PCA score plots, the Multivariate Curve Resolution with Alternating Least Squares (MCR-ALS) chemometric method can also be used successfully for the qualitative (when used without any previous knowledge of the components present in the samples) or semi-quantitative (when the pure components spectral profiles are provided as references) analyses of mixtures of (at least) up to 5 distinct sugars.
  • PublicationOpen Access
    Biochemical and Proteomic Analyses in Drought-Tolerant Wheat Mutants Obtained by Gamma Irradiation
    (MDPI, 2024) Şen, Ayşe; GÜMÜŞ, TAMER; Temel, Aslıhan; Öztürk, İrfan; ÇELİK, ÖZGE
    The bread wheat cultivar (Triticum aestivum L. cv. Sagittario) as a parental line and its mutant, drought-tolerant lines (Mutant lines 4 and 5) were subjected to polyethylene glycol (PEG)-induced drought. Drought stress resulted in decreased chlorophyll levels and the accumulation of proline and TBARS, despite increases in activities of catalase, peroxidase, and superoxide dismutase enzymes. Transcription of the genes encoding these enzymes and delta-1-pyrroline 5-carboxylase synthetase was induced by drought. 2-DE gel electrophoresis analysis identified differentially expressed proteins (DEPs) in the mutant lines, which are distinguished by "chloroplast", "mitochondrion", "pyruvate dehydrogenase complex", and "homeostatic process" terms. The drought tolerance of the mutant lines might be attributed to improved photosynthesis, efficient ATP synthesis, and modified antioxidant capacity. In addition to proteomics data, the drought tolerance of wheat genotypes might also be assessed by chlorophyll content and TaPOX gene expression. To our knowledge, this is the first proteomic analysis of gamma-induced mutants of bread wheat. These findings are expected to be utilized in plant breeding studies.
  • PublicationOpen Access
    Reversal in Solvatochromism, Photochromism and Thermochromism in a New Bis-azo Dye Based on Naphthalen-1-amine
    (Elsevier B.V., 2024) Sıdır, İsa; Kara, Yunus Emre; Sıdır, Yadigar Gülseven; Berber, Halil; FAUSTO, RUI
    A novel bis-azo dye, 4,4′-((1E,1′E)-(oxybis(4,1-phenylene))bis(diazene-2,1-diyl))bis(naphthalen-1-amine) (abbreviated as 4odna) was synthesized and characterized by IR and 1H, 13C and 2D COSY-NMR spectroscopies, and mass spectrometry. Optical properties were evaluated using UV–vis absorption spectroscopy. The observed solvatochromism was ascribed to the presence of different azo or/and hydrazone forms in solution. The azo forms show both positive and negative solvatochromism, with the reversal occurring for solvents with ET(30) ∼45 kcal mol−1, while the hydrazone tautomer shows negative solvatochromism. Application of the multiparametric Catalán and Kamlet-Taft linear solvation energy models allowed to evaluate the dependence of the solvatochromism exhibited by 4odna on the hydrogen bond donating (HBD) and accepting (HBA) abilities of the solvent, as well as on their dipolarity (SdP) and polarizability (SP). Upon UV (λ = 311 nm) irradiation at room temperature, the compound was found to exhibit similar photochromic behavior in the polar-protic solvents methanol and ethanol, which is distinct from that observed in the polar-aprotic solvents dichloromethane, chloroform and chlorobenzene, with the hydrazone tautomer being photoconverted into the azo tautomer in the first group of solvents and vice-versa in the second group. In acetone, UV irradiation extensively transforms the compound into species with no absorption in the visible range, leading to fast discoloration of the solution. Temperature dependence of the color of the solutions of 4odna in ethanol and chlorobenzene was also evaluated, and reversible thermochromic behavior was observed in the first solvent. In chlorobenzene, no thermochromism was observed, but a change of color of the solution was promptly induced by the UV–vis broadband source beam of the spectrometer when the absorbance spectrum of the solution was being recorded at T = 115 °C, which demonstrates that the azo forms of 4odna undergo easy phototransformation into the hydrazone forms in this solvent at high temperature. © 2023 Elsevier B.V.
  • PublicationRestricted
    Load Frequency Control in Smart Grids: A Review of Recent Developments
    (Elsevier Ltd., 2024) Wadi, Mohammed; Shobole, Abdulfetah; ELMASRY, WİSAM; Küçük, İsmail
    This study provides a comprehensive and fresh review of load frequency control (LFC) in multi-area interconnected power systems (MAIPSs). The central tasks of LFC are to keep frequency variations as minimum as possible to achieve an acceptable level of stability. This research provides a complete view, from early classical control to recent technologies and modern techniques considering strategies, robust, optimal, self-tuning, and adaptive controllers for LFC in MAIPSs. Fuzzy control and earlier and recent optimization algorithms also are analyzed. The linearity, nonlinearity, and uncertainty of LFC models are also investigated. This review emphasizes recent technological advances and novel control strategies. LFC is also considered with the integration of wind, photovoltaic, electric vehicles, and storage devices. Besides, the utilization of machine learning and reinforcement techniques is examined. Further, LFC in smart grids and modern complex power systems concerning limited communication bandwidth, communication failure, and cyber-attacks are also investigated. This review provides an in-depth and detailed diagnosis of the challenges associated with LFC in modern and complex power systems. This work may be valuable for studies and practitioners interested in LFC. It, in detail, investigates future efforts and directions to enhance LFC performance, stability, and reliability in the face of increasing complexity and uncertainty. © 2023 Elsevier Ltd