Munzur ÜniversitesiMunzur ÜniversitesiAçık Erişim Arşivi · RDL Open

Sürdürülebilir Kalkınma Amaçları

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Yeniden eskiyeEskiden yeniye
  • MakaleYayıncıda açık erişim2026Scopus SJRQ1
    Explainable AI-based deep learning architectures for hydrogen prediction in biomass syngas and photocatalysis processes: Towards a sustainable and efficient energy economy

    Imak, Andaç

    This study, focusing on sustainable energy production and particularly the hydrogen (H2) economy, presents an advanced artificial intelligence (AI) framework for accurately predicting H2 production from sucrose photocatalysis catalyzed by LaFeO3 (GLFO) and the H2 concentration in syngas derived from biomass conversion. The research was conducted along two main directions: (i) deep learning (DL) architectures comprising nine specially designed recurrent neural network-based models and (ii) six conventional machine learning (ML) algorithms. For both H2 production systems, the best-performing models were identified and further interpreted using explainable AI (XAI) based on SHapley Additive exPlanations (SHAP). Among all investigated algorithms, a hybrid One-dimensional Convolutional Neural Network–Bidirectional Long Short-Term Memory–Bidirectional Gated Recurrent Unit (1D-CNN–BiLSTM–BiGRU) model demonstrated the highest predictive performance. Using 10-fold cross-validation, the proposed model achieved outstanding accuracy, with an R2 value of 0.9987 ± 0.0011 for photocatalytic H2 production prediction and 0.9980 ± 0.0006 for syngas H2 concentration prediction. These results highlight the potential of the proposed framework as a precise, reliable, and practical methodological approach for modeling and optimizing complex thermochemical energy systems.

    • SDG 7 · Erişilebilir ve Temiz Enerji
    • SDG 9 · Sanayi, Yenilikçilik ve Altyapı
    • SDG 13 · İklim Eylemi
    ScopusWeb of Scienceİncele
  • MakaleAçık Erişim2026Scopus SJRQ2
    Relative Efficiencies of Live, Dry and Mixed Food Diets for Larval Rearing of Tigris Scraper (Capoeta umbla) and the Influence of Stocking Density on Fry Growth Characteristics

    Gün, Abdulselam; Kızak, Volkan; Gündüz, Fatih

    In this research, larval growth features by applying different diets and growth characteristics of fry at different stocking densities were studied under controlled conditions for the Tigris scraper (Capoeta umbla). In the first experiment, the growth and survival rates of Tigris scraper postlarvae were evaluated under three different diet regimes over 21 days. The highest mean total length was 24.04±0.27 mm in the group L1 fed solely Artemia nauplii, and the lowest mean total length was 17.89±0.16 mm in the group L2 fed only dry feed. The highest mean specific growth rate was in the L1, and the lowest mean specific growth rate was in the L2. In the second experiment in which the growth characteristics of fry were investigated at different stocking densities for 98 days, the highest mean live weight was found in S1 with 2.819±0.157 g and the lowest mean live weight was determined as 0.859±0.073 g in S5. The highest mean specific growth rate was in S1, while the lowest rate was in S5. High stocking densities were found to be disadvantageous for growth of C. umbla fry. The findings suggest that successful rearing of Tigris scraper postlarvae and fry is feasible under controlled conditions.

    • SDG 2 · Açlığa Son
    ScopusWeb of Scienceİncele
  • MakaleAçık Erişim2026Scopus SJRQ1
    Failure of a Code-Compliant Reinforced Concrete Building: Damage Patterns and Nonlinear Seismic Response

    Onat, Onur; Karaşin, İbrahim Baran; Yön, Burak; Varolgüneş, Sadık; Öncü, Mehmet Emin; Uslu, Ali

    This study investigates the seismic performance limitations of a newly constructed reinforced concrete building that collapsed during the 6 February 2023 Kahramanmaraş–Elbistan earthquake despite formal compliance with current seismic design requirements. Beyond the specific earthquake event, the study addresses a broader scientific problem: the limited understanding of the relationship between observed damage mechanisms and nonlinear dynamic response in mid-rise reinforced concrete buildings. The first part classifies recurring structural and non-structural damage patterns identified in newly constructed RC residences. The second part presents a nonlinear fiber-based static and dynamic analysis of a collapsed mid-rise building. Nonlinear dynamic analyses were conducted using ground motion records scaled to match the site-specific elastic design spectrum defined by TBDY 2018, corresponding to predefined seismic performance levels rather than an incremental dynamic analysis framework. The results indicate that an extremely low shear wall–to–floor area ratio (0.0357%) combined with asymmetric vertical element distribution significantly amplified torsional response and local shear demands. Nonlinear dynamic analyses showed that critical shear walls exceeded Collapse Prevention limits under DD2-level excitation, while system-level shear contribution limits remained within code-defined thresholds. Dynamic base shear demand corresponded to approximately 30% of the maximum nonlinear capacity obtained from pushover analysis, indicating that localized member failure rather than global strength deficiency governed the collapse mechanism. The analytically identified critical members were consistent with the observed collapse configuration, particularly at the soft ground story. The findings demonstrate that prescriptive code compliance alone may not ensure satisfactory seismic performance when structural irregularities, torsional amplification, and detailing deficiencies coexist. The results are consistent with damage patterns reported in other recent destructive earthquakes and contribute to improving the understanding of collapse mechanisms in code-compliant RC buildings.

    • SDG 11 · Sürdürülebilir Şehirler ve Topluluklar
    AtıfScopus4OpenAlex7
    ScopusWeb of Scienceİncele
  • MakaleYayıncıda açık erişim2026Scopus SJRQ1
    Radon anomalies environmental radiation transfer and radiological risk assessment in a fault controlled Lake system

    Dartay, Mürşide; Yılmaz, Mücahit; Kırat, Güllü

    This study investigates the coupling between radon (222Rn) anomalies, seismic activity, hydrogeochemical transport, and radiological risk in Lake Hazar, an active fault controlled lake located along the East Anatolian Fault Zone (EAFZ), Türkiye. Soil gas and dissolved 222Rn concentrations were periodically monitored on a monthly basis from September 2024 to August 2025 using a DURRIDGE RAD7 detector coupled with RAD H2O accessories and the results were evaluated with regional seismicity within a 50 km radius. Natural radionuclide activities (40K, 238U, and 232Th) were determined using 2″ × 2″ NaI(Tl) well-type gamma spectrometry detector. 222Rn anomalies were assessed using μ + σ, μ + 2σ thresholds, the Standardized Radon Index (SRI), and the Dobrovolsky preparation radius model. Soil 222Rn ranged from 87.6 to 541.8 Bq/m3, with the highest value (SRI = 2.81) recorded in September 2024, approximately one month before the Mw 6.0 earthquake in October 2024. Although this temporal coincidence is consistent with previous observations reported for tectonically active regions, the present dataset does not allow a definitive causal interpretation. Dissolved 222Rn varied from 34.1 to 69.8 Bq/L and showed delayed but detectable responses during periods of Mw ≥ 5 seismic activity. Radiological indices calculated for fish tissues remained far below international safety thresholds: Hin and Hex were < 1, Raeq values were substantially lower than the recommended limit of 370 Bq/kg, and absorbed dose rates were below the global average value of 59 nGy/h reported by UNSCEAR. In addition, annual effective dose values from fish muscle consumption remained well below the public exposure limit of 1 mSv/year recommended by ICRP, and ELCR values were within the low risk range commonly used in environmental radiological assessments. These findings indicate that active fault controlled lake systems may provide integrated environmental settings where tectonic stress, 222Rn migration, aquatic radionuclide transfer, and radiological exposure processes interact. Novelty statement: This study presents an integrated environmental investigation of soil gas and dissolved water 222Rn variability, radionuclide transfer in aquatic biota, and radiological risk assessment within the tectonically active Hazar Lake system located on the East Anatolian Fault Zone (EAFZ), Türkiye. The novelty of the present study lies in the following aspects: • Simultaneous evaluation of soil and dissolved water 222Rn anomalies together with seismic activity in a fault controlled lake ecosystem. • Application of the Standardized Radon Index (SRI) approach for normalized temporal interpretation of radon anomaly behavior in both soil gas and aqueous environments. • Integration of tectonic hydrogeochemistry with environmental radioactivity and aquatic radionuclide transfer assessment. • Combined investigation of radon anomaly behavior and radionuclide accumulation in fish tissues within the same tectonically active environmental system. • Inclusion of radiological risk indices (Hin, Hex, Raeq, Iγ, AGED) together with internationally accepted reference values for environmental and public health interpretation. • Development of a multidisciplinary environmental monitoring framework linking lithospheric, hydrospheric, and biospheric processes in active fault controlled lake environments. To the best of our knowledge, this is among the limited studies combining 222Rn anomaly monitoring, aquatic radionuclide transfer, and radiological risk assessment within an integrated tectonic lake ecosystem framework.

    • SDG 6 · Temiz Su ve Sanitasyon
    Scopusİncele
  • MakaleYalnız künye2026Scopus SJRQ3
    Enrichment factor (EF) of REEs in soil fractions of different grain sizes: Malatya–Kuluncak, Başören Village

    Kirat, Güllü; Erdem, Özlem

    This study investigated the enrichment factor (EF) and geochemical relationships of rare earth elements (REEs) in different grain size fractions of soils collected from Başören village, Kuluncak district, Malatya province, Türkiye. A total of 22 surface soil samples were collected and separated into five grain size fractions (< 75, 75–150, 150–180, 180–250, and > 250 μm), yielding 110 samples. Concentrations of La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Yb, Lu, and Y were determined by ICP-MS. EF values ​​were calculated using Al as the reference element, and Pearson correlation was applied to evaluate the relationships between REEs. Strong positive correlations were observed among most REEs (r = 0.999–1.000, p < 0.01), whereas weaker correlations were shown between Eu and Gd elements and La, Ce, Pr, Nd, Sm, Tb, Dy, Ho, Yb, Lu, and Y elements. Moderately positive relationships were determined between Al and REEs, with coefficients of determination (R2) ranging from approximately 0.33 to 0.54, indicating that REE distributions are primarily controlled by aluminosilicate minerals and fine-grained fractions. EF values ​​varied between sampling areas and grain size fractions. While negligible to moderate enrichment was observed in most samples, significant to very high enrichment was observed in some samples, particularly for Gd, Tb, Dy, Ho, and Yb. Samples T16 and T20 showed the highest enrichment levels, with Gd reaching very high enrichment classes (EF = 20–40). The results show that the spatial distribution and enrichment patterns of rare earth elements are largely influenced by lithogenic sources and grain size-dependent mineralogical characteristics.

    ScopusWeb of Scienceİncele
  • MakaleYalnız künye2026Scopus SJRQ2
    Drying Shrinkage and Microstructural Properties of Geopolymers Including Steel and Iron Particles

    Gulmez, Nihan; Kockal, Niyazi Ugur

    Geopolymer mortars show significantly higher shrinkage than normal Portland cement mortars. So, one of the most important disadvantages of these promising alternative binding materials for their wider applications is the cracking occurring by shrinkage. Different inserts and fibers are used in fresh mixtures in order to control drying shrinkage cracks and to provide mechanical capacity. The aim of this study is to investigate the effectiveness of using both metal particles (iron particles) and metallic fibers (steel particles) in geopolymer composites to reduce drying shrinkage. In addition, microstructural properties of composites were determined by scanning electron microscopy (SEM) and X-ray diffraction (XRD) analyses and causes of shrinkage were investigated in detail. Mixtures containing 20% ​​silica fume have 38.4% lower drying shrinkage than slag-based mixtures. In slag-based composites, decreases in drying shrinkage were found as 18.8% and 49.1% when adding 10% iron particles or 10% steel particles compared to metal-free composites.

    Scopusİncele
  • MakaleAçık Erişim2026Scopus SJRQ1
    Examining the effect of authentic leadership and contextual performance on work engagement among employees working in sports organizations

    İnce, Uğur; Özcan, Büşra; Siyahtaş, Anıl; Erdoğan, Ramazan

    Background – This study examines the relationship between authentic leadership and employees’ contextual performance and investigates its association with work engagement. Specifically, the aim was to explore how authentic leadership practices are associated with employee motivation and job performance in the sports sector. Methods – The study employed a quantitative research method using measures of authentic leadership, work engagement, and contextual performance. Data were collected through surveys administered to participants, and various statistical analyses were conducted. A mediation analysis was conducted to examine whether work engagement mediates the relationship between authentic leadership and contextual performance. Results – The analysis showed that authentic leadership is positively associated with work engagement (β = 0.516; p < 0.001). Work engagement is also positively associated with contextual performance (β = 0.393; p < 0.001). Mediation analysis suggested that authentic leadership is indirectly associated with contextual performance through work engagement [indirect effect β = 0.205; 95% CI (0.152, 0.259); p < 0.001], while the direct association between authentic leadership and contextual performance remained significant (β = 0.311; p < 0.001). Conclusion – The study’s results indicate that authentic leadership is positively associated with contextual performance via higher employee engagement in the sports sector. The trusting environment and supportive communication provided by authentic leaders are associated with higher employee motivation and linked to better performance outcomes. The findings suggest that sports managers may benefit from cultivating authentic leadership qualities, which are likely to be associated with greater organizational effectiveness.

    • SDG 8 · İnsana Yakışır İş ve Ekonomik Büyüme
    AtıfOpenAlex1
    ScopusWeb of SciencePubMedİncele
  • MakaleAçık Erişim2026Scopus SJRQ3
    Effect of mechanical activation on lithium and alkali cation release from dolomitic clay wastes of boron processing plant

    Boylu, Feridun; Teker, Gülsen Obuz; Angur, Gafure Ersever; Ozdemir, Orhan; Çelik, Mehmet Sabri

    With the significant increase in lithium demand and production, alternative resources such as lithium-bearing clays have increasingly attracted attention and have been considered as a potential source. In addition to conventional Li recovery methods such as acid treatment and roasting, more economical and environmentally friendly techniques such as mechanical activation followed by water leaching are also being considered. In Türkiye, wastes from boron processing plants, containing approximately 900 ppm of lithium and mainly of dolomitic clays and unrecovered boron minerals (~10-13% of waste), are considered as a potential lithium source. However, due to high dolomite and boron mineral contents, the waste material may release significant amounts of alkaline earth ions such as Na+, K+, Mg2+, Ca2+, and B2O3 during leaching, which may interfere with lithium extraction from the solution. In this study, the leaching behavior of lithium, alkali ions, and other possible elements (e.g., B2O3, Fe3+, and Al3+) from both raw clay waste and mechanically activated forms of this waste material was investigated in detail. The results showed that water leaching without sodium salt of activated waste samples achieves about 44.7–57.7% lithium recovery, yielding high lithium concentrations (80–115 ppm), low levels of alkali ions (4430 ppm Na+, 114 ppm K+, 20 ppm Ca2+, and 7 ppm Mg2+), and almost no detectable Fe3+ (<0.2 ppm) or Al3+ (0.07 ppm) ions. On the other hand, a single problem was encountered where 0.95 % of B2O3 concentrations did not decrease in water leaching at even room temperature.

    • SDG 6 · Temiz Su ve Sanitasyon
    • SDG 12 · Sorumlu Üretim ve Tüketim
    ScopusWeb of Scienceİncele
  • MakaleAçık Erişim2026Scopus SJRQ4
    Oxidative Stress Response to Zinc Oxide, Copper Oxide and Iron (III) Oxide in Gammarus pulex; [Gammarus pulex'te Çinko Oksit, Bakır Oksit ve Demir (III) Oksit'e Karşı Oksidatif Stres Tepkisi]

    Aydin, Ayşe Nur; Çiçek Çi̇Men, Işıl Canan; Serdar, Osman

    Nanoparticles (NPs) are increasingly used across various fields of science and technology, including food science from crop harvesting to final food consumption. With their widespread application in daily life, the environmental effects of nanoparticles have become an important area of academic investigation. In this study, Gammarus pulex species was selected as research material/bioindicator species to investigate the effects of zinc oxide (ZnO), copper oxide (CuO), and iron(III) oxide (Fe2O3) on aquatic life. To conduct the experiments, separate setups were established for each of the nanoparticles (ZnO, CuO, and α-Fe2O3). Following ten organisms for each concentration group (10, 20, and 40 ppm) with corresponding control groups, exposures were performed for 24 and 96 hours. Samples were collected at both time points and biochemical analyses were conducted using homogenization procedures. The results were evaluated statistically. According to the findings, SOD activity increased significantly after exposure to ZnO, CuO, and Fe2O3. CAT activity did not show any change under ZnO NP exposure, whereas a decrease was observed under CuO and Fe2O3 NP exposures. However, a significant increase in TBARS levels and a significant increase in GSH levels were observed following nanoparticle exposure. Based on the study data, exposure to ZnO, CuO, and Fe2O3 appears to induce oxidative stress in G. pulex.

    ScopusTR Dizinİncele
  • MakaleAçık Erişim2026Scopus SJRQ2
    Exploring Health Literacy, Anxiety, and Perception Among Nursing and Allied Health Students in Turkey: A Cross-Sectional Study

    Yeşiltepe, Akgün; Daşbilek, Ferhat; Ayhan, Mehmet Osman

    Background: Health literacy, anxiety, and perception directly affect healthcare students' readiness for professional roles. Assessing these factors is crucial to enhance both their well-being and patient care quality. This study examined health literacy, health anxiety, and health perception among Health Sciences students and their links to socio-demographic factors. Methods: A cross-sectional and descriptive design was used in accordance with the STROBE guidelines. The sample, consisting of 258 students from Munzur University Faculty of Health Sciences, was selected using stratified and simple random sampling methods. Data were collected using a Descriptive Information Form, the Health Literacy Scale, the Health Anxiety Inventory, and the Health Perception Scale. Descriptive statistics, Mann−Whitney U, Kruskal−Wallis tests with Bonferroni correction, and Spearman's correlation analysis were conducted using SPSS 26 and JASP 0.19. Results: Students demonstrated inadequate health literacy (17.75 ± 11.37) and moderate health perception (43.43 ± 6.25); the mean health anxiety score was 18.78 ± 6.14. A weak but statistically significant positive correlation was found between health literacy and health anxiety (r = 0.225, p < 0.05) and between health perception and health anxiety (r = 0.215, p < 0.05); however, no significant correlation was observed between health literacy and health perception (r = 0.090, p > 0.05). Health perception revealed statistically significant differences according to maternal education level, place of residence, and frequency of reading health-related research. Health literacy significantly differed by academic department, year of study, perceived health status, and perceived usefulness of online health information. Health anxiety varied significantly by the presence of chronic illness, chronic illness status, perceived health status, medication use, and alcohol/tobacco consumption. Conclusion: The findings highlight the complex interplay between cognitive (health literacy), emotional (health anxiety), and perceptual (health perception) dimensions of student health. Promoting digital health literacy and providing counselling services may help reduce health anxiety and enhance self-awareness among health sciences students.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    • SDG 4 · Nitelikli Eğitim
    ScopusWeb of SciencePubMedİncele
  • MakaleYayıncıda açık erişim2026Scopus SJRQ3
    Interfacial Polarization in PS/Sm2O3 Nanocomposite Films for Low-Loss Frequency-Dependent Dielectric Application

    Güner, Melek; Özkan, Betül Çiçek; Gürgenç, Ezgi; Macit, Cevher Kürşat; Aslan, Naim; Gurgenc, Turan

    Rare-earth oxide nanoparticles offer a strategy to tune dielectric films via interfacial polarization while maintaining low-loss insulating behavior. Here, polystyrene/samarium oxide (PS/Sm2O3) nanocomposite films containing 0, 1, 3, 5, and 10 wt.% Sm2O3 were fabricated by solvent casting and evaluated as a low-loss dielectric for frequency-sensitive electronic applications. FTIR, XRD, SEM/EDX, and XPS confirmed successful Sm2O3 incorporation, preservation of the PS structure, formation of PS/Sm2O3 interfacial regions, and Sm3+/Sm–O species. XRD revealed amorphous PS with increasingly intense crystalline Sm2O3 reflections, whereas SEM/EDX showed relatively uniform filler distribution at low and moderate loadings and partial agglomeration at 10 wt.%. Dielectric spectroscopy at room temperature from 1 kHz to 1 MHz showed a frequency-dependent response governed by interfacial polarization and limited charge transport. At 1 kHz, the dielectric constant increased from 8.67241 ± 0.00280 for pure PS to 10.13061 ± 0.00641 for PS-10, while the loss tangent remained low (∼ 0.068). The dielectric loss increased moderately from 0.59535 ± 0.00236–0.69194 ± 0.00710, and AC conductivity rose from (3.31202 ± 0.01314) × 10−10 to (3.84935 ± 0.03948) × 10−10 S cm−1. These results indicate interface-controlled dielectric enhancement without conductive percolation, highlighting PS/Sm2O3 films for capacitor dielectric layers, insulating films, flexible electronics, and frequency-sensitive dielectric technologies.

    ScopusWeb of Scienceİncele
  • MakaleYayıncıda açık erişim2026Scopus SJRQ1
    Tailoring of Dy2O3-B4C hybrid-reinforcements in Fe-Co-Ni-Cr-W High-Entropy Alloy (HEA) matrix for correlating structural, mechanical, and experimental gamma-ray transmission behaviour

    Özkul, İskender; Güler, Ömer; Camgoz, Berkay; ALMisned, Ghada; Yaprak, Gunseli; Tekin, H.O.; Durmus, Hasan

    This study investigates the structural, mechanical, and experimental gamma-ray attenuation properties of Fe-Co-Ni-Cr-W high-entropy alloy (HEA) composites reinforced with varying concentrations of Dy2O3 and B4C. A series of samples (S0-S4) was synthesized via vacuum arc melting to evaluate the synergistic effects of rare-earth oxide and carbide additions on a stable multi-component matrix. Thermodynamic assessments confirmed that the base alloy aligns with solid-solution formation criteria (1.61R configurational entropy, Ω = 10.33), which was experimentally validated by XRD patterns revealing a consistent FCC crystal structure across all compositions. SEM-EDS mapping further verified the successful integration of reinforcements as discrete secondary phases within the HEA matrix. Mechanical characterization showed that ceramic incorporation significantly enhances the hardness of the monolithic HEA, with the hybrid-reinforced S3 sample achieving a peak value of 628 HV. This improvement is attributed to the combined effects of oxide dispersion strengthening and microstructural refinement induced by B4C. Experimental gamma-ray transmission tests, conducted using a high-purity germanium (HPGe) detector in the 276-383 keV energy range, demonstrated that the S3 configuration provides the most efficient shielding performance, characterized by the lowest transmission factors. Interestingly, the results suggest that beyond an optimal threshold, increased reinforcement loading, as seen in S4 sample, may lead to minor performance trade-offs due to phase distribution dynamics. The findings highlight that the development of multifunctional HEA-based shields requires a delicate balance between reinforcement volume fraction and microstructural homogeneity to maximize both structural and shielding efficiency.

    AtıfOpenAlex1
    ScopusWeb of Scienceİncele
  • MakaleAçık Erişim2026Scopus SJRQ3
    Neuro-linguistic programming for postoperative pain management: A randomized controlled trial

    Dal, Nursel Alp; Beydağ, Kerime D.; Doğan, Aysel

    Effective control of pain after cesarean delivery is essential, as poorly managed postoperative pain is a common complication that can impair maternal recovery and early infant care. This prospective, randomized, single-blind controlled trial, conducted in the postpartum unit of Kocaeli University Hospital, Kocaeli, Türkiye, between March 2021 and June 2022, compared the effect of a single neuro-linguistic programming (NLP) session added to standard postoperative care against standard care alone. Seventy-six consenting women were randomized in equal numbers to the intervention (standard care plus NLP) or control (standard care only) group. The primary outcome was pain intensity, measured with the Visual Analogue Scale (VAS) before and after the intervention period. Mean follow-up pain scores were significantly lower in the intervention group (2.37±1.792) than in the control group (6.68±2.068; p<0.001), while baseline pain scores and maternal demographic and obstetric characteristics did not differ significantly between groups. Adding a single NLP session to standard postoperative care effectively reduced pain after cesarean delivery, supporting its use as a non-pharmacological adjunct in postoperative nursing and midwifery practice. African Journal of Reproductive Health © 2026.; Une prise en charge efficace de la douleur après une césarienne est essentielle, car une douleur postopératoire mal gérée constitue une complication fréquente susceptible de nuire au rétablissement de la mère et aux premiers soins prodigués au nourrisson. Cet essai prospectif, randomisé, contrôlé en simple aveugle, mené dans l’unité post-partum de l’hôpital universitaire de Kocaeli, à Kocaeli, en Turquie, entre mars 2021 et juin 2022, a comparé l’effet d’une seule séance de programmation neurolinguistique (PNL) ajoutée aux soins postopératoires standard à celui des soins standard seuls. Soixante-seize femmes ayant donné leur consentement ont été randomisées en nombre égal dans le groupe d’intervention (soins standard plus PNL) ou dans le groupe témoin (soins standard uniquement). Le critère d’évaluation principal était l’intensité de la douleur, mesurée à l’aide de l’échelle visuelle analogique (EVA) avant et après la période d’intervention. Les scores moyens de douleur observés lors du suivi étaient significativement plus faibles dans le groupe d’intervention (2,37 ± 1,792) que dans le groupe témoin (6,68 ± 2,068 ; p < 0,001), tandis que les scores de douleur initiaux ainsi que les caractéristiques démographiques et obstétricales des mères ne présentaient pas de différence significative entre les groupes. L’ajout d’une seule séance de PNL aux soins postopératoires standard a permis de réduire efficacement la douleur après une césarienne, ce qui plaide en faveur de son utilisation comme complément non pharmacologique dans la pratique infirmière et obstétricale postopératoire.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    ScopusPubMedİncele
  • MakaleAçık Erişim2026Scopus SJRQ1
    Loneliness as a predictor of quality of life in older adults receiving primary health care in Türkiye: a cross-sectional study

    Atila, Dinçer; Yeşiltepe, Akgün; Çal, Ayşe

    Background: Loneliness and social isolation among older adults is a growing concern in many societies, as the aging population continues to increase. The aim of the study is to examine the relationship between loneliness and quality of life in individuals aged 65 and over who apply to primary health care institutions. Methods: This descriptive-correlational study was conducted face-to-face with 216 individuals aged 65 and over. The socio-demographic form and the Loneliness Scale for Elderly and Quality of Life Scale were used as data collection tools in the study. JASP 0.19, SPSS 26 analysis programs were used to perform t test, One Way ANOVA Bonferrroni test, Pearson correlation, and regression analysis. Results: According to Pearson correlation analysis, strong negative relationships were found between quality of life and loneliness in the elderly. As quality of life increased, levels of loneliness, social loneliness, and emotional loneliness decreased (r = −0.854, r = −0.737, r = −0.717; p <0.001). While there was a strong positive relationship between the loneliness scale for elderly and the social loneliness sub-dimension (r = 0.867, p < 0.001), there was also a positive relationship between the loneliness scale for elderly and the emotional loneliness sub-dimension (r = 0.835, p < 0.001). A statistically significant difference was found between chronic disease, educational status, income status, marital status, and both loneliness and quality of life. Conclusion: Loneliness is an important predictor of quality of life among older adults. Both social and emotional loneliness are negatively associated with quality of life, indicating that higher levels of loneliness are linked to lower quality of life in this population.

    • SDG 3 · Sağlık ve Kaliteli Yaşam
    ScopusWeb of SciencePubMedİncele
  • MakaleAçık Erişim2026Scopus SJRQ1
    Comparative Study of Enzymatic and Oxidative Polymerization of a Benzothiazole-Based Schiff Base and Its Antibacterial Properties

    Kaya, İsmet; Solmaz, Adnan; Abuawad, Mohammed Majed Shible

    In this study, the Schiff base 1-(((6-nitrobenzo[d]thiazol-2-yl) imino)methyl)naphthalen-2-ol (NBTIMN) was synthesized and subsequently polymerized by two different methods. Oxidative polymerization in the presence of organic (o-(NBTIMN)-O) and aqueous alkaline media (o-(NBTIMN)-A) was one of the techniques. The other was enzyme-catalyzed oxidative polymerization (o-(NBTIMN)-E), which was conducted at room temperature with hydrogen peroxide and the enzyme horse radish peroxidase (HRP). The structures of the obtained oligomers were characterized using FT-IR, 1H-13C-NMR, UV–Vis, CV, and GPC analyses, and their electrochemical and optical band gaps were determined as 2.68, 2.66, and 2.49 eV, and 3.08, 2.90, and 3.07 eV for o-(NBTIMN)-O, o-(NBTIMN)-A, and o-(NBTIMN)-E, respectively. Thermal analyses demonstrated that the o-(NBTIMN)-O and o-(NBTIMN)-A derivatives exhibited enhanced thermal stability, characterized by higher decomposition temperatures and LOI values. SEM analyses revealed distinct differences in surface morphologies depending on the polymerization conditions. Antibacterial assays showed that o-(NBTIMN)-O exhibited the strongest broad-spectrum inhibition, whereas NBTIMN displayed pronounced activity against S. aureus. In contrast, o-(NBTIMN)-A and o-(NBTIMN)-E were found to be inactive. These results highlight the critical influence of polymerization conditions on both the physicochemical characteristics and the biological activities of the synthesized structures. Importantly, the comparative design of enzymatic and chemical polymerization demonstrates the potential for environmentally friendly synthesis strategies. The distinct electrochemical and thermal properties suggest applicability in electronics and sensor-related fields, while the pronounced antibacterial activity of o-(NBTIMN)-O holds promise for biomedical and antimicrobial applications.

    ScopusWeb of Scienceİncele
  • MakaleAçık Erişim2026Scopus SJRQ2
    A New Product: Determination of Shelf Life of Fish Onion Rings at Freezer Temperature

    Kuzgun, Nermin Karaton

    The enrichment in terms of fish protein of fast food products is becoming increasingly important day by day. The aim of this study was to determine the shelf life of a new product—fish onion rings—under deep-freezing conditions (−18°C). Minced fish meat (180 g) was combined with minced onion (350 g), water (220 mL), corn flour (50 g), wheat flour (180 g), and salt (20 g), and the mixture was blended with a mixer until a homogeneous texture was obtained. Then, the mixture was shaped into onion rings using a dough-shaping tool (manually). The chemical, sensory, and microbiological quality attributes of the fish onion rings were recorded at 30-day intervals. In the samples, deterioration was observed at the end of the 180th day (as chemical, sensory, and microbiological quality). In the fish onion ring group, the TBA (0.07 ± 0.05–3.02 ± 0.97) and peroxide (0.19 ± 0.18–4.40 ± 0.31) values remained similar during storage. In the microbiological analysis of the experimental fish onion rings, the total viable count (TVC) was 2.63 ± 0.15 on Day 0. Furthermore, the samples underwent sensory evaluation for appearance, odor, and taste. It was determined that the most preferred group was the fish-supplemented group.

    • SDG 2 · Açlığa Son
    • SDG 14 · Sudaki Yaşam
    ScopusWeb of Scienceİncele
  • MakaleYalnız künye2026Scopus SJRQ2
    Oxalic Acid–MAP Synergy in Maintaining Postharvest Grape Quality and Biochemical Content

    Küçüker, Emine; Ağlar, Erdal; Sümbül, Ahmet; Demir, Selda; Özcengiz, Ceyda Kizgin; Güzel, Sedat

    This study was conducted to investigate the effects of oxalic acid (OA) and modified atmosphere packaging (MAP) applications, both alone and in combination, on the preservation of postharvest quality characteristics of grapes. All samples were stored at 4 ± 1 °C and approximately 80–85% relative humidity for 28 days. The OA + MAP treatment most effectively limited weight loss (10.49%), soluble solids content (SSC; 20.62°Bx), and decay rate (1.78%), while providing the best preservation of total phenolic content (68.25% change), antioxidant activity (53.19% change), and individual phenolic compounds at the end of the storage period. A decrease in color parameters, including L* and a* values, was observed, with OA treatment particularly prominent in preserving the red color. Principal component analysis and hierarchical heatmap analysis confirmed distinct clustering of treatments from the control, highlighting the process efficiency of packaging-based interventions. The combination of OA and MAP treatments was more effective than either treatment alone in reducing quality losses in grapes during storage. Therefore, the widespread use of OA + MAP in commercial storage and marketing processes is recommended.

    • SDG 2 · Açlığa Son
    • SDG 12 · Sorumlu Üretim ve Tüketim
    ScopusWeb of Scienceİncele
  • MakaleAçık Erişim2026Scopus SJRQ2
    Pressure-induced transformation in NiTi-CuAg shape memory alloys: investigation of microstructural and thermodynamic changes

    Tatar, Cengiz; Kök, Mediha; Kanca, M Sait; Balci, Esra; Qader, Ibrahim Nazem

    Shape memory alloys (SMAs), particularly nickel-titanium (NiTi) based systems, are widely recognized for their unique shape memory effect and superelastic behavior, driven by reversible martensitic phase transformations. To enhance these functional properties for advanced applications, alloying with elements such as copper (Cu) and silver (Ag) has been explored. This study investigates the synthesis and characterization of a novel quaternary NiTiCuAg shape memory alloy. The alloy was fabricated via arc-melting from high-purity elemental powders, followed by application of varying uniaxial compressive pressures to assess their effects on phase transformation behavior. Thermal, structural, and microstructural properties were evaluated using Differential Scanning Calorimetry (DSC), Scanning Electron Microscopy coupled with Energy-Dispersive x-ray Spectroscopy (SEM-EDX), and x-ray Diffraction (XRD). The results aim to elucidate the combined effects of compositional tailoring and mechanical processing on the functional performance of NiTiCuAg SMAs, with implications for their use in high-performance, pressure-sensitive applications.

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  • MakaleYalnız künye2026Scopus SJRQ1
    Enhancing durability of slag-based alkali-activated composites with dunite sand and carbon fiber: Sulfate, freeze–thaw, and thermal resistance optimization

    Benli, Ahmet; Bürlükkara, Sadullah; Öz, Ali; Karataş, Mehmet; Kaplan, Gökhan

    The replacement of natural river sand with sustainable alternatives is essential to reduce environmental degradation associated with aggregate extraction. In this context, dunite sand (DS), a magnesium-rich ultramafic mineral, was investigated as an eco-efficient fine aggregate in thermally cured slag-based alkali-activated composites (AACs), in combination with carbon fiber (CF) reinforcement. The study aims to clarify how aggregate substitution and fiber addition interact to control matrix densification, crack-bridging efficiency, and durability under aggressive conditions. Sixteen mixtures incorporating varying DS (0–100%) and CF (0–1.00%) contents were prepared and cured at 80°C to promote rapid slag activation and microstructural development. Mechanical performance, high-temperature resistance, sulfate durability, and freeze–thaw behavior were systematically evaluated. The results demonstrate that moderate DS substitution (~25%) significantly improves matrix compactness and interfacial quality through a micro-filler effect, leading to enhanced strength and durability. CF effectively bridge micro cracks and improve flexural and thermal performance; however, excessive fiber contents impair workability and increase porosity due to fiber clustering. Durability results confirm that optimized DS–CF combinations reduce thermal degradation, limit sulfate-induced deterioration, and enhance resistance to cyclic freezing. Overall, 25% DS replacement combined with limited CF content (≤0.50%) provides the best balance between mechanical performance and durability. The findings highlight the importance of controlling aggregate–fiber synergy and curing strategy to develop durable, thermally stable, and sustainable alkali-activated composites for harsh service environments.

    • SDG 9 · Sanayi, Yenilikçilik ve Altyapı
    • SDG 12 · Sorumlu Üretim ve Tüketim
    • SDG 13 · İklim Eylemi
    AtıfScopus5WoS4OpenAlex4
    ScopusWeb of Scienceİncele
  • MakaleAçık Erişim2026Scopus SJRQ2
    Investigation of the Mechanical and Metallographic Effects of Adding 2-3% Al-Ti-Mo Elements to High-Entropy CoCrFeNi Alloys

    Dilek, İlhan; Taşgın, Yahya; Kanca, Muhammed Sait; Kök, Mediha; Güler, Ömer

    Recently, high-entropy alloys (HEAs) have attracted significant attention due to their unique multicomponent composition and exceptional mechanical properties, such as high wear and corrosion resistance, making them superior to conventional alloys for advanced engineering applications. The effects of Al, Ti, and Mo addition on the microstructural and mechanical properties of CoCrFeNi-based HEAs were investigated. The alloys were produced via powder metallurgy and vacuum arc melting, with the addition of 2 and 3% Al, Ti, and Mo, respectively. Scanning electron microscopy (SEM), energy-dispersive x-ray spectroscopy (EDS), and x-ray diffraction (XRD) were used to perform microstructural characterization, while microhardness and wear tests were used to evaluate mechanical performance. The addition of Al and Ti enhanced the face-centered cubic phase stability and increased the hardness by improving the lattice structure. In contrast, the addition of Mo contributed to solid solution and precipitation hardening, resulting in a simpler microstructure and superior tribological performance. Among all compositions, the alloy with 3% Mo addition exhibited the highest hardness value (≈ 233.8 HV) and the lowest mass loss (4.3 mg) was observed, indicating a significant improvement in the wear resistance and mechanical strength. In conclusion, the addition of Ti and Mo to CoCrFeNi HEAs promotes solid solution, precipitation, and grain boundary hardening mechanisms, thereby enhancing microstructural integrity, hardness, and wear resistance. These findings suggest that such alloys are promising candidates for use as next-generation structural and tribological materials under demanding operational conditions.

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