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  The relationship between partner attachment, psychological well-being, and menopausal symptoms in postmenopausal women

  (BioMed Central Ltd, 2026) Nurdilan, Şener Çetin; Öztürk, Simge; Yasin, Çetin; Öztürk, Simge; Sağlık Bilimleri Fakültesi, Hemşirelik Bölümü

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  Objective: This research aimed to determine the relationship between menopausal symptoms experienced by postmenopausal women and their levels of spousal attachment and psychological well-being. Methods: This descriptive research was conducted with 1334 postmenopausal women. Data were collected using the Personal Introduction Form, Experiences in Close Relationships Inventory-II (ECR-R), Psychological Well-Being Scale (PWS) and Menopause Rating Scale (MRS).Descriptive statistics and Pearson correlation analysis were used to analyze the data. Data were analyzed using descriptive statistics, Pearson correlation, and Cronbach alpha reliability coefficients. Results: The mean age of the participants was 58.38 ± 7.41 years, and the mean age at menopause was 48.9 ± 3.73 years. A low-level positive correlation was found between menopausal symptoms and both anxious (r =.286, p <.001) and avoidant spousal attachment (r =.182, p <.001). Conversely, a low-level negative correlation was identified between menopausal symptoms and psychological well-being (r=−.220, p <.001). These findings indicate that higher insecure partner attachment is associated with increased menopausal symptoms, whereas higher psychological well-being is associated with fewer symptoms. Conclusion: The results highlight the importance of psychosocial factors in the menopausal experience. Higher insecure partner attachment was associated with increased menopausal symptoms, whereas higher psychological well-being was associated with fewer symptoms. Interventions targeting emotional support, relationship quality, and psychological well-being may be relevant areas for future research. Future studies should include diverse populations and examine additional factors such as social support, marital satisfaction, and lifestyle characteristics to better understand their relationship with menopausal health.

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  The relationship between body mass index and types of peer bullying in primary school students: Rising risk in cyberbullying

  (Frontiers Media SA, 2026) Büyükşahin, Yasemin; Biçim, Esma Nur; Büyükşahin, Yasemin; Eğitim Fakültesi, Temel Eğitim Bölümü

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  Introduction – Childhood obesity and peer bullying are significant psychosocial challenges in primary education. This study investigated the predictive effect of Body Mass Index (BMI) categories on various types of peer bullying victimization among primary school students. Methods – Using a correlational screening model, data were collected from 579 students (Grades 1–4) in Bartin, Türkiye, during the 2025–2026 academic year. Instruments included a six-item peer bullying questionnaire and standardized physical measurements. BMI was categorized according to WHO (2007) references. Overweight and obese groups were merged for comparison against the normal-weight group. Statistical analyses included chi-square tests, binary logistic regression, and Pearson/Spearman correlations. Results – While BMI category did not significantly predict general victimization, cyberbullying emerged as a consistent exception. In the unadjusted logistic regression, overweight/obese students were 1.83 times more likely to experience cyberbullying [OR = 1.83, 95% CI (1.008, 3.328), p = 0.047]; a permutation test confirmed this was unlikely to reflect chance (pperm = 0.032). When adjusted for gender and grade, this association showed borderline significance (OR = 1.77, p = 0.064). Correlation analyses confirmed a positive relationship between continuous BMI and cyberbullying (ρ = 0.092, p = 0.027). Discussion – Higher BMI is more closely associated with cyber victimization than physical or social bullying. Overweight children may face increased digital risks due to social withdrawal. Prevention programs should address the “invisibility” of cyberbullying and encourage the broader school community—including teachers—to avoid stigmatizing language and behaviors.

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  Temperature–load-dependent wear transitions of PH 15–5 stainless steel under dry sliding

  (Wiley-Blackwell, 2026) Altaş, Emre; Küçük, Yılmaz; Bayraktar, Ömer; Karakoç, Halil; Karabulut, Şener; Altaş, Emre; Mühendislik Mimarlık ve Tasarım Fakültesi, Makine Mühendisliği Bölümü

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  The dry sliding behavior of PH 15–5 precipitation-hardened stainless steel was investigated at room temperature and −40 °C under 10 and 20 N using reciprocating ball-on-disc tests. A 6 mm WC–Co ball was used at 34 mm s−1 for 30 min, corresponding to 61.2 m sliding distance. Friction, wear volume, surface morphology, elemental distribution, phase constitution, topography, and room-temperature nanoindentation response were evaluated. The H1025-aged steel exhibited a predominantly lath-martensitic morphology, a hardness of ~4.15 GPa, and a reduced elastic modulus of ~220 GPa. At 10 N, −40 °C produced lower wear volume and a shallower track than room temperature despite a higher steady-state mean coefficient of friction (CoF). At 20 N, −40 °C yielded the highest steady-state mean CoF, temporal variability, wear volume, and track depth, together with extensive cracking, deep grooves, coarse debris, and large delaminated regions. Room-temperature wear showed surface smearing, localized adhesion, and more uniformly distributed oxygen-rich regions. The low-temperature morphology is consistent with crack-assisted delamination; however, without cross-sectional characterization or low-temperature fracture testing, crack-initiation depth and propagation path could not be established. The results show that the sub-zero response depends strongly on applied load and cannot be inferred from friction magnitude alone.

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  Synthesis, characterization and biological evaluation of novel imidazothiazole-based chalcone derivatives as cholinesterase inhibitors through computational and experimental approaches

  (Academic Press Inc., 2026) Özcan, İbrahim; Erdoğan, Taner; Taslimi, Parham; Sadeghian, Nastaran; Tahtacı, Hakan; Taslimi, Parham; Sadeghian, Nastaran; Fen Fakültesi, Biyoteknoloji Bölümü

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  In this study, fifteen imidazothiazole-based chalcone derivatives ( 6–20 ) were synthesized and evaluated as potential cholinesterase inhibitors through computational and experimental approaches. Fourteen of these compounds are reported for the first time, while the previously known derivative ( 8 ) was newly assessed for its AChE and BChE inhibitory activities in relation to Alzheimer's disease (AD). In silico studies, including density functional theory (DFT) calculations, molecular docking, molecular dynamics simulations, binding free energy calculations, and ADMET analyses, suggested that these compounds could act as dual cholinesterase inhibitors. The compounds were synthesized via a three-step route and structurally characterized by 1H NMR, 13C NMR, FT-IR, and mass spectrometry. Their inhibitory activities against AChE and BChE were evaluated using the Ellman method, and kinetic parameters were determined through nonlinear regression and Lineweaver-Burk analyses. All derivatives exhibited inhibitory activity in the picomolar range. Among them, compounds 6 , 12 , and 20 were the most potent AChE inhibitors, whereas compounds 18 , 19 , and 6 showed the highest potency against BChE. Notably, compound 6 exhibited potent dual inhibition against both enzymes. Kinetic studies indicated a mixed-type inhibition mechanism, suggesting interactions with both catalytic and peripheral binding sites. Overall, these findings identify imidazothiazole-based chalcone derivatives as promising dual cholinesterase inhibitors and provide a basis for further optimization and investigation as potential therapeutic candidates for AD.

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  Sustainable geopolymers incorporating PCM-impregnated paper pulp sludge for energy-efficient building applications

  (Wiley-Blackwell, 2026) Öztürk, Savaş; Sütçü, Mücahit; Küçükdoğan, Nilay; Ustaoğlu, Abid; Gençel, Osman; Yaprak, Hasbi; Memiş, Selçuk; Sarı, Ahmet; Hekimoğlu, Gökhan; Erdoğmuş, Ertuğrul; Güler, Saadet; Ustaoğlu, Abid; Erdoğmuş, Ertuğrul; Gençel, Osman; Mühendislik Mimarlık ve Tasarım Fakültesi, Makine Mühendisliği Bölümü; Mühendislik Mimarlık ve Tasarım Fakültesi, İnşaat Mühendisliği Bölümü; Mühendislik Mimarlık ve Tasarım Fakültesi, Çevre Mühendisliği Bölümü

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  The integration of phase change materials (PCMs) into building components is an effective strategy to enhance thermal energy storage and reduce energy demand. This study presents a metasilicate-activated waste-based geopolymer composite produced by incorporating PCM-impregnated paper pulp sludge (PPS) into a binder system composed of blast furnace slag and silica fume. PPS was impregnated with 45 wt% methyl palmitate to obtain a leakage-resistant geopolymer composite. The mixtures were prepared with varying silica fume contents (0–5 wt%), Si/Al ratios (3.2–3.4), and a silica modulus (Ms≈2.8–3.1) under ambient curing at 30°C. The effects of PCM loading and silica fume content on physical, mechanical, and thermal behavior were examined through density, porosity, compressive strength, DSC, and solar thermoregulation tests. Calorimetric results confirmed that PPS effectively acted as a stable PCM carrier, ensuring reliable thermal storage with a melting enthalpy of ~110 J/g and excellent cyclic stability. PPS/PCM-based panels reduced peak room-center temperatures by up to 12.3%, while the maximum lower-surface temperature reduction reached approximately 5°C compared with the reference geopolymer panel. The predicted thermal-economic analysis demonstrated significant energy savings and feasible cost payback periods. These results highlight the potential of PPS/PCM integrated geopolymers as sustainable and energy-efficient building materials.

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