Scopus İndekslenen Yayınlar

Permanent URI for this collectionhttps://hdl.handle.net/20.500.12597/3197

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SIK2: A Novel Negative Feedback Regulator of FGF2 Signaling
(John Wiley and Sons Inc, 2024) Kuser-Abali, G.; Ugurlu-Bayarslan, A.; Yilmaz, Y.; Ozcan, F.; Karaer, F.; Bugra, K.
A wide range of cells respond to fibroblast growth factor 2 (FGF2) by proliferation via activation of the Ras/ERK1/2 pathway. In this study, the potential involvement of salt inducible kinase SIK2) in this cascade within retinal Müller glia is explored. It is found that SIK2 phosphorylation status and activity are modulated in an FGF2-dependent manner, possibly via ERK1/2. With SIK2 downregulation, enhanced ERK1/2 activation with delayed attenuation and increased cell proliferation is observed, while SIK2 overexpression hampers FGF2-dependent ERK1/2 activation. In vitro kinase and site-directed mutagenesis studies indicate that SIK2 targets the pathway element GRB2-associated-binding protein 1 (Gab1) on Ser266. This phosphorylation event weakens Gab1 interactions with its partners growth factor receptor-bound protein 2 (Grb2) and Src homology region 2 domain containing phosphatase 2 (Shp2). Collectively, these results suggest that during FGF2-dependent proliferation process ERK1/2-mediated activation of SIK2 targets Gab1, resulting in downregulation of the Ras/ERK1/2 cascade in a feedback loop.
Simultaneous clavicular hook plate fixation in bilateral distal clavicle fractures (Neer type II): A case report
(2024) Akar, B.; Ugur, F.
RATIONALE: Bilateral distal clavicle fractures (BDCF) are exceedingly rare types of fractures. This study aimed to evaluate the surgical treatment under a single anesthesia for trauma-induced BDCF (Neer type II) through a case report. PATIENT CONCERNS: The patient brought to the emergency department due to a motor vehicle accident exhibited severe pain, tenderness, swelling, and deformity in both shoulder regions upon physical examination. No significant pain or tenderness was detected in other areas of the body. There were also no signs of additional neurological deficits or vascular pathology in the extremities. DIAGNOSES: Radiographic examinations led to a diagnosis of BDCF (Neer type II). INTERVENTIONS: Surgical intervention involved the simultaneous application of a neutral-angled hook plate to both clavicles via open reduction. OUTCOMES: Postoperative radiographs taken at the 12th week demonstrated complete healing in both fractures and no functional limitations in shoulder movements. LESSONS: BDCF can compromise the stability of the shoulder girdle, necessitating surgical intervention with anatomical reduction and rigid fixation.
Polymeric Adsorbent for the Effective Removal of Toxic Dyes from Aqueous Solutions: Equilibrium, Kinetic, and Thermodynamic Modeling
(John Wiley and Sons Inc, 2024) Oter, C.; Gokkus, K.; Gur, M.; Butun, V.
This study investigates the adsorption behavior of anionic (Congo red, Eosin yellow) and cationic (Malachite green) dyes on synthesized TD polymer particles, highlighting the material's potential as an effective adsorbent for industrial wastewater treatment. Key operational parameters, including initial solution's pH, contact time, initial dye concentration, and temperature, were systematically evaluated to determine their influence on adsorption efficiency. The experimental data demonstrated that the Langmuir isotherm provided the best fit for all three dyes, indicating monolayer adsorption with maximum adsorption capacities of 153.8 mg/g for Malachite green, 49.36 mg/g for Congo red, and 227.9 mg/g for Eosin yellow. Kinetic analysis revealed that the adsorption of Malachite green and Congo red followed pseudo-second-order kinetics, while Eosin yellow adsorption was better described by the intra-particle diffusion model. Thermodynamic assessments, including Gibbs free energy (ΔG°), enthalpy (ΔH°), and entropy (ΔS°), confirmed the spontaneous and endothermic nature of the adsorption processes for Malachite green and Eosin yellow, contrasting with the exothermic behavior observed for Congo red. These findings underscore the versatility and effectiveness of TD polymer particles in removing both anionic and cationic dyes from aqueous solutions. Further research could explore material optimization and real-world applications to broaden their utility in sustainable water treatment strategies.
Toxic metal accumulation, health risk, and distribution in road dust from the urban traffic-intensive environment
(Springer, 2024) Isinkaralar, O.; Isinkaralar, K.; Nguyen, T.N.T.
Owing to increasing levels of potentially toxic metals in road dust, air pollutants suspended in the air, pose significant health risks due to rapid, unplanned urbanization and industrialization. This study investigated the pollution status and health risks of trace metals (i.e., Cr, Cd, Ni, Cu, and Pb) in road dust collected from 16 locations across six land-use categories in Eskişehir, Türkiye, including residential, roadside, traffic, tram stations, and car industrial areas. The analysis of trace metals revealed distinct types of urban pollution based on these functional areas. In areas with heavy traffic, high concentrations of the elements, especially Zn, Cr, and Ni, would indicate significant toxic metal pollution. The overall contamination was evaluated using three indices: enrichment factor (EF 0.45–65.75), geo-accumulation index (Igeo − 2.50–4.18), and pollution index (PI 0.27–27.22). Human health risks of potentially toxic trace metals in urban road dust were evaluated for children and adult groups based on hazardous index (HI) and total cancer risk (TCR). The health risk assessments revealed that children (mean HIchildren 8.62E − 01; TCRchildren 6.99E + 04) are more vulnerable to toxic metal exposure than adults (mean HIadults 1.01E − 01; TCRadults 3.01E + 04), with ingestion being the primary exposure route over dermal contact and inhalation. In conclusion, we have captured the interaction between road dust and health risks, especially for children. Graphical Abstract: (Figure presented)
Python-based machine learning estimation ofthermo-hydraulic performance along varying nanoparticle shape, nanofluid and tube configuration
(Elsevier Ltd, 2025) Gürsoy, E.; Tan, M.; Gürdal, M.; Çetinceviz, Y.
In this research article, a Python-based machine learning model prediction study was conducted based on the study results obtained from sudden expansion tubes containing different expansion angles, dimpled fin structures and nanofluids, whose thermo-hydraulic performance was previously examined. In the study, Artificial Neural Network and Ridge regression models were used to make predictions on the average Nusselt number (Nu), average Darcy friction factor (f) and performance evaluation criteria (PEC). Physical variations of the sudden expansion tube were taken into account and a detailed comparison of the results was made. A superior average Nu was acquired as 172.45 %, 22.05 %, 17.18 %, 13.65 %, and 7.76 % compared to Ag-MgO/H2O, Al2O3/H2O (blade), CoFe2O4/H2O, Al2O3/H2O (cylindrical), and Al2O3/H2O (platelet), respectively. The highest Performance Evaluation Criteria (PEC) for Re= 2000 based on Al2O3/H2O (platelet) shows an increase of 4.84 %, 12.08 %, 11.76 %, 66.05 %, and 148.94 % compared to Al2O3/H2O (cylindrical), Al2O3/H2O (blade), CoFe2O4/H2O, Fe3O4/H2O, and Ag-MgO/H2O, respectively. From the results obtained, it was determined that Python-based Machine Learning approach which facilitates custom optimizations showed a significant performance with small margins of error in predicting the heat transfer parameters. The lowest error rates of machine learning and polynomial ridge regression models ranged from 0.2 % to 5.4 % for the unseen test set and the application of Python-based algorithms provided considerable savings in calculation time compared to conventional methods. On the other hand, using machine learning models with feature engineering has been found to increase model performance by at least 30 %. In these years when studies on the predictions of thermo-hydraulic studies are very rare in the literature, this study is intended to facilitate scientists, engineers and academicians who will further study on this subject.
Burden and associated characteristics in caregivers of Parkinson's disease patients
(John Wiley and Sons Inc, 2024) Inaltekin, A.; Kocatürk, I.
Background: Parkinson's disease (PD) increases patient load and requirements of care. Determining the burden on PD patients' caregivers and associated factors may help to identify methods to reduce caregiver burden. This study investigated the factors associated with caregiver burden among PD patients caregivers. Methods: Eighty-five PD patients and 85 caregivers were included in the study. Zarit Burden Interview (ZBI) was used to measure caregiver burden; the Ways of Coping Scale (WCS) was used for coping; Modified Hoehn-Yahr Staging (MHYS) was used for staging patients. The International Parkinson and Movement Disorder Society Unified Parkinson's Disease Rating Scale (MDS-UPDRS) parts 1 and 3 were used to evaluate non-motor and motor problems. Caregivers' depression and anxiety levels were evaluated with the Beck Depression Inventory and Beck Anxiety Inventory (BAI). Spearmen correlation coefficient was used to evaluate the relationship of variables with the ZBI score, and multiple linear regression analysis was used to determine the predictors of the ZBI score. Results: A positive significant relationship was found between the ZBI score and BAI score, MHYS score, WCS total score, and subscales: keeping to self, seeking refuge in fate, and seeking refuge in supernatural forces. MHYS score, WCS total score, BAI score, and MDS-UPDRS-1 were predictors of the ZBI score. Conclusions: The anxiety levels of caregivers, their ways of coping, and the patient's stage of the disease are important in caregiver burden. Coping ways can be changed to reduce the care burden. Developing psychological interventions for caregivers to change their coping styles can be important
Urban Heat Island From A 3d Modeling Perspective—A Review
(Springer Science and Business Media Deutschland GmbH, 2024) Yilmaz, D.; Ozturk, S.
The number of studies on the urban heat island has been increasing in recent years. Developments in geospatial analytics, especially in recent years, have made frequent use of three-dimensional 3D modeling techniques in urban heat island research. There is a limited number of studies in the literature that deals with a systematic review of planning strategies and 3D modeling techniques used that are effective in reducing the formation of urban heat islands. The study presents an evaluation of a total of 33 studies that evaluated planning strategies that are effective in reducing the urban heat island effect with 3D modeling. The studies were evaluated in 4 sections. While the parameters used in the studies were evaluated in the first part, a summary of the studies and the criteria they used were evaluated in the second part, and the techniques of the studies were evaluated in the third part. In the last part, the programs used in 3D modeling were evaluated. As a result of the evaluations, it has been determined that buildings, green areas, and pavements, which are the most effective factors in the formation of urban heat islands, should be taken into account in planning strategies. In these 33 studies examined, the cooling effect of green areas on urban areas comes to the fore. These studies show that it has been concluded that the 3D indicators reflect the temperature, built environment, and land cover/use relationship in the best way. This result shows that 3D spatial modeling techniques should be preferred more in urban heat island research since they better reflect 2D land cover variables.
Ameliorative effects of humic acid and L-tryptophan on enzyme activity, mineral content, biochemical properties, and plant growth of spinach cultivated in saline conditions
(John Wiley and Sons Inc, 2024) Turfan, N.; Kibar, B.; Davletova, N.; Kibar, H.
Salinity poses a significant abiotic stress that limits plant productivity, thereby posing a serious threat to agricultural sustainability and worldwide food security. Techniques that can overcome this problem are needed. Recent focus has been placed on employing organic substances like humic acid (HA) and amino acids, including L-tryptophan (L-TRP), to mitigate the negative effects of salt stress on cultivated plants. Accordingly, in this research, the impact of foliar applications of HA and L-TRP, both separately and combined, on the growth parameters and biochemical properties of spinach subjected to salt stress was investigated. In the present study, eight treatments (1. control, 2. salt (NaCl), 3. HA, 4. L-TRP, 5. HA + NaCl, 6. L-TRP + NaCl, 7. HA + L-TRP, and 8. HA + L-TRP + NaCl) were investigated. The study showed that salt stress markedly reduced several growth properties in spinach, including plant height, number of leaves, leaf dimensions, and both fresh and dry weight. Additionally, it significantly lowered contents of chlorophyll (a, b, and total), carotenoid, polyphenol, lutein, anthocyanin, polyphenol oxidase, glycine betaine, relative water content, and the antioxidant enzyme activities (ascorbate peroxidase, catalase, peroxidase, and superoxide dismutase). On the other hand, significant increases were observed in sodium, chlorine, potassium, sulfur, zinc, nickel, proline, malondialdehyde, and hydrogen peroxide levels of spinach with salinity. Individual and combined applications of HA and L-TRP positively influenced plant growth, relative water content, activities of antioxidant enzyme, chlorophyll, and mineral contents of spinach under both normal and saline conditions. In conclusion, the combined use of HA and L-TRP under salt stress conditions is promising in mitigating the negative impacts of salinity and can be suggested as an effective alternative approach for cultivating spinach in saline environments.
Preliminary study on the impact of 900 MHz radiation on human sperm: An in vitro molecular approach
(Elsevier Inc., 2024) Keskin, I.; Karabulut, S.; Kaplan, A.A.; Alagöz, M.; Akdeniz, M.; Tüfekci, K.K.; Davis, D.L.; Kaplan, S.
The use of technologies that produce and emit electromagnetic fields (EMF) is growing exponentially worldwide. The biological effects of EMF-emitting equipment, such as mobile phones and other wireless devices, have been studied in the last decade using in vitro and in vivo methods. Infertility is a growing health problem, and nearly half of cases are because of male-factor. This study investigated the direct in vitro effects of 900 MHz radiation exposure on sperm parameters, genetic status, apoptotic markers, and the PI3K/AKT signaling pathway in healthy normozoospermic men. Semen samples were divided into four groups, two control (30 min and 1 h) and two EMF exposure (30 min and 1 h). Sperm parameters (motility, progressive motility, acrosomal index, morphology), genetic status (DNA fragmentation and chromatin integrity), apoptotic markers (cytokine-c and caspase-3 expression) and the PI3K/AKT signaling pathway (phosphoinoitide 3-kinase-PI3K- and phosphorylated AKT- p-AKT-) were analysed. Sperm motility were significantly reduced in 30 min EMF exposure while a significant increase in the expression of p-AKT were observed in 1 h EMF exposure group. An increased vacuolisation, acrosomal defect, extension of subacrosomal space, uncondensed chromatin structure, apoptotic signs and disrupted axoneme were observed in both EMF groups which were not observed in the control group. Other sperm parameters (morphology and acrosomal index), genetic status, apoptotic markers and the PI3K expression rates had no significant change.
The Role of Hearing Aids in Improving Dual-Task Gait Performance in Older Adults With Presbycusis: A Cognitive and Motor Analysis
(John Wiley and Sons Ltd, 2024) Soylemez, E.; Soylemez, T.G.; Apaydin, A.S.; Apaydin, Z.K.; Yasar, M.
Background: Cognitive decline is a common challenge faced by older individuals with presbycusis; their performance on dual-task (DT) activities is generally lower compared to those without hearing loss. However, the influence of hearing aids on nonauditory cognitive decline in this population remains unclear. This study aims to investigate the effect of hearing aids on nonauditory DT performance in older adults with presbycusis. Material and Methods: This study included older people with presbycusis who used hearing aids (P&HA group), those with presbycusis who did not use hearing aids (PoHA group), and a control group of healthy adults. Forward and backward digit span tests and timed up and go test (TUG) were administered to all individuals. TUG and motor and cognitive (forward and backward digit span) tasks were applied simultaneously to evaluate the participants' DT performance. Results: The study comprised 60 individuals with presbycusis (19 females, 41 males; mean age: 73.23 ± 6.49 years) and 30 healthy adults (15 females, 15 males; mean age: 35.93 ± 8.57 years). Healthy adults performed better than the P&HA and PoHA groups in all the administered tests (p < 0.05). There was a moderate negative relationship between the severity of hearing loss and the forward and backward digit span test performances (p < 0.05). The P&HA group performed better than the PoHA group on the DT cognitive forward and backward digit span tests. Conclusion: The use of hearing aids and their proper fitting are important not only for improving communication skills and reducing listening effort but also for supporting nonauditory cognitive functions, minimizing the risk of falls during DT activities, and enhancing the overall quality of life.
The Effect of Green Kitchen Practices on Restaurant Choice Intentions
(Ebru Bagci, 2024) Sevim, B.; Çalışkan, S.; Okur, F.
This study focuses on consumers’ attitudes and behavioral intentions when choosing environmentally friendly restaurants with green kitchen practices (GKP). This is an under-researched area despite the growing green movement. This framework aims to obtain information about consumers’ attitudes and understand whether attitudes, subjective norms, and perceived behavioral control impact individu-als’ intention to choose a restaurant. In this context, the studies in the literature were investigated, and a research model was proposed. Face-to-face and online survey methods were applied to measure the perceptions of the variables in the research model. The research sample consists of 428 participants re-siding in Istanbul, Izmir and Bursa, where GKP are intense. The data obtained from the research were analyzed using structural equation modeling. As a result of the analysis, the model proposed in the study was accepted, and the proposed hypotheses were supported. As a result of the research, in line with the Theory of Planned Behaviour (TPB), it was found that attitude towards behavior (ATB), subjective norm (SN), and perceived behavioral control (PBC) have statistically significant and positive effects on restaurant choice intention. In line with this result, the outputs reached will contribute to acade-mia and the sector.
From Ancient Paths to Modern Discoveries: The Backpacker Tourism Experience on the Lycian Way
(Ebru Bagci, 2024) Aydın, Ç.
The experiences of backpackers hiking the Lycian Way have been thoroughly examined in this study. The study indicates that the path can be a means of experiencing several dimensions at once. The analysis of user comments collected on Google Maps revealed that the experiences of tourists were gathered into four primary dimensions. These dimensions are Emotional, Physical, Intellectual, and Spiritual. Gratefully, on one hand, the emotional dimension impresses the natural scenery to tourists which include the feelings of awe and peace they have. On the other hand, the physical dimension highlights the difficulties of the walk that require endurance. The intellectual dimension is an opportunity to gain new historical and cultural impressions of sites along the route while the spiritual dimension involves the deep connection to nature and self-growth aspect. The research shows that the Lycian Way is not only a physical activity but also an emotional, intellectual, and spiritual experience. These results offer newer insights in sustainable tourism practices and destination management. Moreover, attention to tourism research through online user comments is underlined and stressed that it gives a realistic data source. Future research can be done on the influence of such occurrences in various tourist profiles and their contributions to the local economy
Phase change material incorporated paper pulp sludge/gypsum composite reinforced by slag and fly ash for energy efficient buildings: Solar thermal regulation, embody energy, sustainability index and cost analysis
(Elsevier Ltd, 2024) Kucukdogan, N.; Sutcu, M.; Ozturk, S.; Yaprak, H.; Memis, S.; Gencel, O.; Ustaoglu, A.; Sari, A.; Hekimoglu, G.; Erdogmus, E.
This study focuses on the reuse of some industrial wastes in the development of innovative building materials and the thermal performance, environmental impacts and cost estimates of the gypsum composite material developed in the case of a phase change material impregnation. Lauryl alcohol (LA) was impregnated into paper pulp sludge (PPS) up to 45 % by weight without leakage to obtain shape-stable composites. The LA impregnated PPS (PPS/LA) was replaced with PPS at 50 % and 100 % by weight in gypsum composite. Characteristics of shape-stable composites were studied. Also, the physical, mechanical, thermal properties and solar thermoregulation tests of the produced gypsum composites were examined in addition to the embodied energy, CO2 emissions and cost analysis. The melting and solidification enthalpies of PPS/LA were found to be 100.4–100.1 J/g, with only a 0.5 % reduction in latent heat storage capacity after 500 cycles, and approximately 3 % after 1500 cycles. Although the presence of PPS/LA in the gypsum composite caused a slight decrease in compressive strength, it significantly improved solar thermoregulation performance, maintaining ambient temperatures 2.55 °C to 5 °C warmer at night and 5.3 °C to 13.8 °C cooler during the day. Gypsum composites containing the PPS/LA offer a suitable alternative for energy-efficient sustainable building application by reusing around 57 % of three different industrial wastes providing a waste-reducing environmental approach and a high level of indoor thermal comfort.
Correction to: Genomic diversity of major tree species in the Eurasian relict forests of northern Iran (Tree Genetics & Genomes, (2024), 20, 5, (35), 10.1007/s11295-024-01670-w)
(Springer Science and Business Media Deutschland GmbH, 2024) Vatanparast, M.; Madsen, P.; Sagheb-Talebi, K.; Larsen, J.B.; Ayan, S.; Hansen, O.K.
The original version of this article unfortunately contained a mistake. Author “Khosro SaghebTalebi” wants to correct his affiliation to “Research Institute of Forests and Rangelands (RIFR), Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran.” The original article has been corrected.
On the Properties of the Modified λ-Bernstein-Stancu Operators
(Multidisciplinary Digital Publishing Institute (MDPI), 2024) Lin, Z.P.; Torun, G.; Kangal, E.; Kantar, Ü.D.; Cai, Q.B.
In this study, a new kind of modified (Formula presented.) -Bernstein-Stancu operators is constructed. Compared with the original (Formula presented.) -Bézier basis function, the newly operator basis function is more concise in form and has certain symmetry beauty. The moments and central moments are computed. A Korovkin-type approximation theorem is presented, and the degree of convergence is estimated with respect to the modulus of continuity, Peetre’s K-functional, and functions of the Lipschitz-type class. Moreover, the Voronovskaja type approximation theorem is examined. Finally, some numerical examples and graphics to show convergence are presented.
Sustainable Use of Waste Tire Rubbers in Eco-Friendly and Lightweight Alkali-Activated Slag-Silica Fume Mortars
(American Society of Civil Engineers (ASCE), 2024) Dheyaaldin, M.H.; Bayraktar, O.Y.; Öz, A.; Kaplan, G.
This study examines the benefits of substituting waste tire aggregate (WTA) for pumice aggregate in alkali-activated slag mortars at replacement ratios of 0% to 60% (by volume). Additionally, silica fume (SF) was added to mortar mixes at a concentration of 10% by volume to improve their compressive and flexural strength, water absorption, water sorptivity, porosity, density, thermal conductivity, and microstructural properties. The influences of chemical sulfate attacks, exposed temperatures, and compressive strength were investigated. Test findings showed that using WTA severely decreased mechanical strength and durability. Conversely, a mixture with 60% WTA reacted at a lower strength and durability compared with different percentages of WTA for all the properties examined in this study. SF has led to significant enhancements in mechanical strength and durability, especially at an early age. On the eighth day of the specimen curing period, the compressive and flexural strength increased by 20%. Additionally, by raising the curing temperatures by 80°C enhances the polymerization process, the polymerization process is strengthened, boosting durability characteristics and improving mechanical strength and durability. When exposed to higher temperatures, the mechanical strength and durability reduced the specimens' strength and weight. Specimens exposed to sulfate attack solutions can reduce the mechanical strength by 1%-3% for a 120-day curing period in a chemical solution, even more reducing the weight of specimens and shapes after visual inspection.
Microplastics in commercially sold fishes from General Santos City Fish Port Complex, Philippines
(BIOFLUX SRL, 2024) Agao-Agao, A.J.; Aliganza, K.; Bornales, J.; Agao-Agao, A.M.; Agao-Agao, A.; Tahiluddin, A.; Özdemir, K.Y.
The excessive global production and inadequate recycling of plastics have led to the accumulation of plastic waste, which degrades into microplastics and poses a threat to marine organisms and human health. The need to study microplastic contamination in wet markets in General Santos City Fish Port Complex (GSCFPC), is crucial for assessing exposure risks and implementing measures to mitigate pollution and protect public health. This study aimed to quantify and characterize the ingested microplastics in the gastrointestinal tract of Decapterus macarellus, Euthynnus affinis, and Selar crumenophthalmus, and compare the data among the different fish species. There were seven (7.07%) of 99 individuals contained ten microplastic particles with a mean size of 0.789±0.379 mm. The most abundant microplastic recovered were microfragments (90%) with a dominant color of blue (100%). Based on the polymer composition, ethylene-propylene copolymer was the most prevalent (50%), followed by poly (vinyl stearate) (30%), polyethylene (10%), and polypropylene (10%). The results revealed that all fish species examined exhibited similar susceptibility to microplastic contamination, with D. macarellus ingesting 0.15 particles per individual, followed by S. crumenophthalmus with 0.12 particles per individual and E. affinis with 0.03 particles per individual. Additionally, there was a significant difference (p < 0.05) in microplastic size, indicating that D. macarellus was likely to ingest larger debris compared to S. crumenophthalmus. The study revealed evidence of microplastic contamination in commercial fish species at the GSCFPC. Highlighting the potential risks to human health and the environment of Southern Mindanao, further assessment of smaller fish species and trophic transfer is necessary for a comprehensive understanding of the contamination patterns.
Evaluation of Some Potentially Toxic Elements and Associated Ecological and Health Risks in Topsoil Samples Adjacent to an Industrial Zone in Turkey
(American Chemical Society, 2024) Altıkulaç, A.; Turhan, S.
Potentially toxic element (PTE) pollution as a result of industrial activities remains a global problem that poses serious threats to human and ecological health. PTEs (Al, Fe, Ti, Mn, V, Zn, Cu, Cr, Ni, Pb, Co, and As) are metals or metalloids with biological toxicity. This study analyzed the concentrations of these PTEs and the physicochemical properties of topsoil samples collected from areas near industrial districts in the Samsun province of Turkey to evaluate ecological and health risks, estimating various indexes. The average concentrations of Al, Fe, Ti, Mn, V, Zn, Cu, Cr, Ni, Pb, Co, and As analyzed in 23 topsoil samples by energy-dispersive X-ray fluorescence spectrometry were found as 93,822, 82,410, 6623, 1642, 406, 278, 207, 149, 78, 68, 32, and 10 mg/kg dry weight, respectively. Zn, Cu, Cr, Ni, Pb, and Co levels exceed the maximum contaminant levels in the Turkish Regulation on the Control of Soil Pollution. The average pH values, organic matter, total organic carbon, and nitrogen measured in soil samples were 7.14, 6.11, 0.96, and 0.04%, respectively. The ecological and health evaluation reveals that the studied area is polluted with V, Cu, Zn, As, Ni, and Pb, which may pose a risk to people living in settlements near the industrial district.
Spatial distribution, pollution level and human health risk assessment of heavy metals in urban street dust at neighbourhood scale
(Springer Science and Business Media Deutschland GmbH, 2024) Isinkaralar, O.; Isinkaralar, K.; Nguyen, T.N.T.
Urban street dust (UStD) is a vital issue for human health and is crucial for urban sustainability. This study aims to enhance the creation of safe, affordable, and resilient cities by examining environmental contamination and health risks in urban residential areas. Specifically, it investigates the concentrations and spatial distribution of chromium (Cr), cadmium (Cd), nickel (Ni), copper (Cu), lead (Pb), and zinc (Zn) in UStD in Yenimahalle, Ankara. The mean concentrations of Zn, Cr, Pb, Cd, Ni, and Cu in UStD were 97.98, 66.88, 55.22, 52.45, 38.37, and 3.81 mg/kg, respectively. The geoaccumulation pollution index (Igeo) values for these elements were: Cd (5.12), Ni (1.61), Cr (1.21), Pb (1.13), Cu (0.78), and Zn (0.24). These indices indicate that the area is moderately polluted with Cr, Pb, and Ni, uncontaminated to moderately contaminated with Cu and Zn, and extremely polluted with Cd. The hazard index (HI) values for Cr, Cd, Ni, Cu, Pb, and Zn were below the non-carcinogenic risk threshold for adults, indicating no significant risk. However, for children, the HI values for Pb, Ni, Cd, and Zn were 3.37, 1.80, 1.25, and 1.25, respectively, suggesting a higher risk. Carcinogenic risk (RI) of Cd, Ni, and Pb was significant for both children and adults, indicating that exposure through ingestion, inhalation, and dermal contact is hazardous. The findings highlight the need for strategic mitigation measures for both natural and anthropogenic activities, providing essential insights for residents, policymakers, stakeholders, and urban planners.
Heteronuclear cadmium(II)/cobalt(III) cyanide coordination polymers with 1-methylimidazole and 1-ethylimidazole ligands: synthesis, characterization and catalytic activities
(Elsevier B.V., 2025) Kürkçüoğlu, G.S.; Kekeç, S.; Yeşilel, O.Z.; Gökkuş, K.; Ünver, H.; Şahin, O.
Two new heteronuclear Cd(II)/Co(III) compounds, {[Cd(1-meim)3Cd0.5(1-meim)Co(μ-CN)4(CN)2]}n (1) and {[Cd(1-etim)3Cd0.5(1-etim)2Co(μ-CN)3(CN)3]⋅H2O}n (2) (1-meim: 1-methylimidazole, 1-etim = 1-ethylimidazole), have been synthesized and characterized using elemental analysis, FT-IR and Raman spectroscopy, single-crystal X-ray diffraction techniques. The single crystal X-ray study shows that the compound 1 exhibited a 1D double chain structure and is further linked into 3D supramolecular architectures through C–H⋅⋅⋅N and π⋅⋅⋅π interactions. Whereas the compound 2 displayed 2D network which is extended into a 3D supramolecular framework by O–H⋅⋅⋅N hydrogen bonds and C–H∙∙∙π interactions. In 1 and 2, each Co(III) ion is coordinated by six carbon atoms from cyanide ligands, thus showing an octahedral coordination geometry. Cd1 and Cd2 ions exhibited two different geometries, distorted trigonal bipyramidal and octahedral. Furthermore, phase purities, catalytic and thermal properties were investigated.

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