Lapseki Meslek Yüksekokulu Koleksiyonu

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https://hdl.handle.net/20.500.12428/3546

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Design and thermal profiling of ethyl carbazole-based poly(phenoxy-imine)s: synthesis and characterization
(Springer, 2025) Kaya, İsmet; Yılmaz, Mehmet Hakan; Kolcu, Feyza
A series of Schiff base monomers were synthesized via the condensation of 3-amino-9-ethylcarbazole with various aldehydes, including 3-hydroxybenzaldehyde (3-HBA), 4-hydroxybenzaldehyde (4-HBA), 2-hydroxy-1-naphthaldehyde (2-HNA), and ortho-vanillin. These monomers were subsequently polymerized through oxidative polycondensation using NaOCl as the oxidant to yield corresponding poly(phenoxy-imine)s, namely Poly(3ECIMP), Poly(4ECIMP), Poly(ECIMN), and Poly(ECIMMP). The chemical structures of the synthesized compounds were confirmed using FTIR, UV–Vis, and both 1H and 13C NMR spectroscopy. Thermal characterization using TG–DTA and DSC demonstrated that the synthesized polymers possess excellent thermal stability, as evidenced by their glass transition temperatures between 145 and 161 °C and char yields reaching up to 38.22% at 1000 °C. Furthermore, limiting oxygen index values exceeding 28% indicate that these materials exhibit self-extinguishing behavior. Photoluminescence studies conducted in DMF demonstrated intense fluorescence, particularly for Poly(ECIMN), which exhibited yellow–orange emission upon excitation at 502 nm due to the presence of naphthalene moieties that enhance π-electron delocalization. Optical and electrochemical band gap analyses indicated significantly reduced Eg values for the polymers compared to their monomers, with Poly(ECIMN) showing the lowest band gap of 2.39 eV. Cyclic voltammetry results aligned with optical measurements, confirming improved charge-transfer characteristics in the conjugated polymer backbone. Surface morphology assessed by FE-SEM revealed porous structures, suggesting applicability in gas adsorption or catalytic systems. Size exclusion chromatography confirmed the formation of high molecular weight polymers with narrow polydispersity indices. Collectively, the unique combination of thermal durability, photophysical responsiveness, and structural robustness highlights the potential of these ethyl carbazole-based poly(phenoxy-imine)s in applications spanning optoelectronics, thermal protection, and fluorescence-based sensing.
Remote Sensing-Driven FUCOM Approach for Identifying Suitable Peach Cultivation Sites
(Springer, 2025) Yener, Abdulkadir; Özcan, Hasan; Everest, Timuçin; Sungur, Ali
Land evaluation studies are strategically significant for effectively utilizing agricultural lands, which are rapidly decreasing due to degradation and misuse. The primary objective of this study was to determine the suitability of Umurbey Plain lands in Lapseki district of Çanakkale province in NW Türkiye for peach cultivation. For this purpose, a new approach has been applied. To determine the relative importance criteria, the full consistency method (FUCOM) was used for weight calculation. Afterward, land suitability classifications were validated using the normalised difference vegetation index (NDVI) derived from Sentinel-2A (MSI) satellite images. With the presented model, the accuracy assessment was developed to a higher level. Thirdly, a total of 24 peach orchards were evaluated with NDVI data at the variety level, including varieties ripening in the last week of June (‘Royal Glory’), the second week of July (‘Extreme July’), the first week of August (‘Gloheaven’) and the first week of September (‘Abdos’). In the study area, 9.61% of the lands were classified as highly suitable, 20.02% as moderately suitable, 51.04% as marginally suitable and 19.33% as not suitable. The accuracy assessment of the presented model showed that the vegetation period and land suitability classes of peach varieties were highly accurate. As a result, the NDVI reflectance characteristics of the varieties ‘Royal Glory’, ‘Extreme July’, ‘Gloheaven’ and ‘Abdos’ were found to be highly consistent with the land suitability classes. The study revealed that using remote sensing-driven FUCOM and GIS integration in land evaluation studies is highly beneficial for precision and sustainable agriculture. It is recommended that the model approach in this study be tested under similar climatic conditions and in different geographical regions by evaluating different peach and other plant varieties.
Assessment of the soil fertility in Biga Peninsula (NW), Turkiye: an agro-geologic approach
(Springer, 2025) Koparan, Hakan; Özcan, Hasan; Everest, Timuçin; Sungur, Ali
The aim of this study was, firstly, to determine the soil fertility potential, secondly, to summarize an inventory of agromineral resources using an agrogeological approach in Biga Peninsula. Soil texture, soil reaction, electrical conductivity, soil organic matter, CaCO3%, total nitrogen, available phosphorus, exchangeable potassium analysis were conducted on 1877 soil samples. The results were mapped and interpreted in conjunction with the geological map for agrogeological evaluation. The approach was validated with spatial autocorrelation analysis. pH values ranged from 4 to 5 in 0.69% of the study area, whereas those pH > 8 were found in 3.89%. Depending on the soil requirements of the land use type, material transfer from locations rich in lime to areas with low pH is recommended. While some areas exhibit high nutrient element contents, others, despite being under similar land use, show nutrient deficiencies due to parent material. Phosphorus levels were found to be very low in 0.32% of the total area, whereas approximately 37% exhibited high to very high phosphorus content. Similarly, potassium levels were very low in 4.95%, while 12.5% of the area showed high to very high potassium levels. Moran’s I values for CaCO3, phosphorus, and potassium were 0.603, 0.300, 0.447, respectively, indicating spatial autocorrelation. This study identified potential zones in Biga Peninsula, where particularly potassium and phosphorus-rich materials could be transferred from high areas to areas of deficiency. The applications should be utilized on organic farmland, smallholder farms, land requiring rehabilitation, degraded areas, and pastureland, rather than on large areas.
Determination of chemical weathering and profile development indexes of soils formed on volcanic rocks in the Biga Peninsula, NW Türkiye
(Elsevier, 2025) Everest, Timuçin; Erenoğlu, Oya; Söküt Acar, Tuğba; Temel, Erdem; Sungur, Ali; Özcan, Hasan
Chemical weathering and profile development indexes of soils formed on Ayvacik volcanites (pyroclastic, basalt, andesite, and ignimbrite) in the SW of Biga Peninsula were investigated in this study. Eight soil profiles (two representing each rock type) were excavated on soils formed on pyroclastic, basalt, andesite, and ignimbrite rocks. The profiles were described according to the Soil Survey Manual and classified according to the Soil Taxonomy and the World Reference Base (WRB). Within the study, morphological observations, physicochemical, oxide, and mineralogical analyses were conducted, thin-section interpretations were carried out, and chemical weathering and profile development indexes (PDI) were calculated. In addition, statistical analyses were performed on all data. Chemical index of alteration-CIA, Parker weathering index-WIP, chemical index of weathering-CIW, plagioclase index of alteration-PIA, silica-titania index-STI, bases/R2O3, product index-PWI, Vogt index-V and Ruxton ratio-R were calculated. Relationships between chemical weathering and profile development indexes were tested with multiple statistical evaluations. According to the results of multivariate analysis of covariance (MANCOVA) the effects between chemical weathering indexes and PDI were statistically significant with CIA, WIP, CIW, PWI, and V weathering indexes. In contrast, the impacts of PIA, STI, Bases/R2O3, and R weathering indexes were not significant. These relationships between chemical weathering and PDI were supported by thin section and mineralogical analysis. With the integration of PDI and chemical weathering indexes, WIP was found to be the most suitable weathering index for evaluating soils formed on pyroclastic and basalt rocks, while PWI was found to be suitable for andesite and ignimbrite rocks. These findings provide a robust framework for selecting appropriate weathering indexes tailored to specific volcanic rocks in pedogenetic studies.
Enhanced antimicrobial and anticancer activities of zein protein-agarose@Au composite hydrogel for controlled release of silibinin in colon cancer therapy
(Elsevier, 2025) Atlı, İlknur; Ilgın, Pınar; Karabayır, Elif Sultan; Özay, Hava; Özay, Özgür
In this study, biodegradable hydrogel films based on natural proteins and polysaccharides were synthesized in order to improve controlled drug release, cytocompatibility and antibacterial properties. Biosynthesized gold nanoparticles were incorporated in situ cancer drug-loaded hydrogels to enhance their antibacterial, biocompatible, and cytotoxic characteristics. Then, in order to investigate the association of silibinin drug used in cancer treatment with AuNPs, drug release profile was evaluated under different environmental conditions and release kinetics were analyzed. In addition, antibacterial effects were determined by testing on Gram-negative and Gram-positive bacteria by Disk Diffusion method. As a result, cytocompatibility of silibinin drug and AuNPs in hydrogel networks and their effects on cancer cells were determined by MTT assay using human dermal fibroblasts (CCD1079KSk) and colon cancer (HT-29) cell lines. Thus, AuNPs created a synergistic effect in cancer treatment and strengthened the effect of Silibinin on tumor cells. In addition, it was determined that it exhibited a biocompatible structure by showing minimal toxicity to healthy human skin cells. This innovative drug delivery system has the potential to offer a biomaterial-based alternative in both cancer treatment and wound dressing material with its controlled release feature.
Hydrogen generation from the hydrolysis of piperazine bisborane as new hydrogen carrier material catalyzed by Ru0 nanoparticles embedded in agarose biofilms
(Pergamon-Elsevier Science Ltd, 2025) Özay, Hava; Ilgın, Pınar; Atlı, İlknur; Özay, Özgür
In this study, firstly, piperazine bisborane (PBB) was synthesized and characterized as a solid hydrogen carrier material. Subsequently, a new catalytic system, agarose hydrogel@Ru (AGH@Ru), in which nanosized Ru0 particles were homogeneously dispersed and used as a catalyst for hydrogen production from the hydrolysis of PBB, was prepared. After the structural and morphological characterization of the catalyst, for the first time in the literature, catalytic hydrogen production from the hydrolysis of PBB was initiated. As a result of catalytic hydrolysis reactions conducted under different reaction conditions, it was determined that AGH@Ru achieved 100 % efficiency in the hydrolysis reaction and produced 6 mol of hydrogen per mole of PBB. The activation parameters for the hydrolysis reaction of PBB catalyzed by AGH@Ru were calculated as Ea = 74.95 kJ mol−1, ΔH# = 72.39 kJ mol−1, and ΔS# = −77.74 J mol−1 K−1. The AGH@Ru catalytic system, with a turnover frequency (TOF) of 3.24 min−1 or 194.4 h−1 at 25 °C, also exhibited excellent reusability.
The effect of combined and separate applications of Cordyceps fumosorosea and Phytoseiulus persimilis on the biological control of Tetranychus urticae under laboratory and field conditions
(Taylor & Francis Inc, 2025) Kök, Şahin; Yaşar, İpek; Kasap, İsmail
This study investigated the effect of combined and separate applications of the entomopathogenic fungus (EPF), Cordyceps fumosorosea (Hypocreales: Cordycipitaceae), and the predatory mite (PM), Phytoseiulus persimilis (Acari: Phytoseiidae), on the biological control of Tetranychus urticae (Acari: Tetranychidae) in field-grown tomatoes in Northwest Türkiye in 2021. Based on the laboratory tests, it was determined that C. fumosorosea caused moderate mortality on T. urticae and relatively low mortality on P. persimilis. Field tests on tomatoes showed that the most effective result in suppressing the populations of T. urticae was by the release of P. persimilis alone, followed by the combined application of C. fumosorosea and P. persimilis. The application of C. fumosorosea alone showed a very low effect on the populations of T. urticae. Our results suggest that releasing P. persimilis alone provides more effective biological control of T. urticae on field-grown tomatoes than the combined application of C. fumosorosea and P. persimilis, and application of C. fumosorosea alone.
New approach for raphide crystals in some orchids
(Taylor & Francis Ltd, 2025) Akbulut, Mustafa Kemal
Crystals are stored in different forms in plants' vegetative and reproductive organs. One of these storage forms is raphide crystals, frequently encountered in monocots. Plants have developed effective methods of using these crystals to their advantage. In addition, raphide reveals morphological differences in different plant groups and shows taxonomically usable characters. In our study, raphide crystals found in tuber and root structures of some orchids were examined. Elemental analysis (EDS) was carried out to determine the elemental content of the raphides studied. In addition, a detailed examination of the raphide crystals was carried out using electron microscopy. The analyses included comparisons of length, width, aspect ratio and surface area. Differences in the hill and edge structures of the raphide crystals were also determined. Detailed studies of raphide crystals, especially the hill and edge structures, will contribute to the emergence of important characters.
A new species of Aphis Linnaeus, 1758 (Hemiptera: Aphididae) from the northwestern Türkiye with a key to the species of the subgenus Bursaphis Baker, 1934
(Magnolia Press, 2024) Kök, Şahin; Karabacak, Ersin; Yaşar, İpek; Kasap, İsmail; Barjadze, Shalva
The new aphid species-Aphis (Bursaphis) kazdagensis sp. nov. living on Papaver pilosum subsp. strictum (Papaveraceae) in Çanakkale Province, Türkiye, is described based on the apterous viviparous females. Diagnosis of the subgenus Bursaphis with respect to other species is given. Aphis popovi Mordvilko, 1932 is transferred from the subgenus Aphis to the subgenus Bursaphis. An updated identification key for apterous viviparous females to all Bursaphis species is provided.
Assessment of the anticancer function of Coronilla orientalis MILLER through comprehensive in vitro and computational studies
(Walter De Gruyter Gmbh, 2025) Çiftci, Halil İbrahim; Oral, Ayhan; Coşkun, Yalçın; Renda, Gülin; Otsuka, Masami; Fujita, Mikako; Sever, Belgin
Objectives Although many synthetic anticancer drugs are available, a significant proportion of human therapeutics in the anticancer armamentarium are derived from natural products. The aim of this study to examine the anticancer effects of natural compounds against non-small cell lung cancer (NSCLC) and breast cancer, which remain among the world’s greatest obstacles. Methods Coronilla orientalis MILLER (CO) was collected in Erzincan, Türkiye, prepared, and extracted with 70 % ethanol. CO was then tested against A549 NSCLC and MCF-7 breast cancer cells using the MTT assay. To explore its potential anticancer mechanism, the apoptotic effects of CO in A549 and MCF-7 cells and the kinase inhibitory effects of CO were investigated using the Annexin V/ethidium homodimer III staining assay and the ADP-Glo kinase assay, respectively. Molecular docking studies were also performed for several major components of CO in the ATP binding site of EGFR. Results The results showed that CO, with IC50 values of 2.37 ± 0.59 μg/mL and 7.60 ± 1.18 μg/mL, exhibited anticancer activity against A549 cells and MCF-7 cells, respectively. CO was also selectively cytotoxic between Jurkat cells and PBMCs (healthy). CO-treated A549 and MCF-7 cells were found to undergo significant apoptosis and CO was found to inhibit EGFR. Molecular docking studies revealed the interaction of some defined components of CO with key residues in the ATP binding site of EGFR. Conclusions Taken together, this research has shown that CO has a great deal of potential as an inhibitor of the anticancer function against NSCLC and breast cancer, and warrants further investigation.
Science Education in Museums with Preservice Science Teachers: Discovering the Power of Science in Museums
(Lumen Publishing House, 2025) Sürmeli, Hikmet; Aydın, Ganime; Öztuna Kaplan, Aysun; Melen, Mehpare Saka
Museums, often described as cultural repositories, provide unique environments that help individuals connect the past, present, and future to understand their culture better. Beyond their cultural significance, museums serve as valuable educational spaces where teachers can enhance their scientific knowledge, develop pedagogical skills, and design meaningful learning experiences. Based on the idea that every object in a museum can serve as a teaching tool, the project “Exploring the Power of Science in Museums”, supported by the TÜBİTAK 2237-A Scientific Education Activities Support Program, was implemented to enable pre-service science teachers to establish meaningful connections between artifacts displayed in archaeology and maritime museums and science concepts. A qualitative research design was employed in this study. Data were collected through worksheets, lesson plans, and observation forms. The findings revealed that all pre-service teachers’ perspectives on museums changed positively; most could associate museum objects with science subjects and recognized the potential of museums as dynamic environments for science education.
Sustainable site selection for a cooperative dairy factory in NW Türkiye
(Global Network Environmental Science & Technology, 2025) Everest, Bengü; Everest, Timuçin
The world population is increasing, and agricultural products are strategically crucial for feeding the growing world population. In developed countries, cooperatives serve as an essential tool to ensure the sustainability of agricultural production and reduce costs. In Türkiye, cooperatives play a limited role in controlling the agricultural product market. There are many dairy cooperatives in Türkiye, but they are often ineffective in processing and marketing milk effectively. This study was conducted in Çanakkale, NW Türkiye. In this study, an approach was proposed to enable dairy cooperatives to select suitable sites for establishing a dairy factory. With this proposed approach, milk production quantity, population, land characteristics (land use capability classification (LUCC), and environmental conditions (solar energy potential) were used as main criteria. The Best Worst Method (BWM), a newly developed multi-criteria decision-making method (MCDM), was employed to determine the weights of the selected criteria. A geographical information system (GIS) was used to produce the final suitability map. Based on the BWM calculations, milk production quantity was identified as the most effective factor (46.55%), followed by population (25.86%), land use capability classification (17.24%), and photovoltaic potential (10.35%). The suitability analysis revealed that the Biga district was the most suitable location for establishing a dairy processing plant. The significance of the Biga district lies in its high milk production, large population, and well-established infrastructure that supports milk processing and marketing activities. The novel approach of this study is the integration of milk production, population, land use, and renewable energy potential through a Multi-Criteria Decision-Making (MCDM) method within a GIS environment, providing a guideline for the sustainable milk processing capacities of agricultural cooperatives. By considering photovoltaic potential and the utilization of marginal lands, the study emphasizes the importance of renewable energy and land conservation in dairy processing, thereby ensuring long-term environmental and economic benefits. Prioritizing sustainable and cooperative-oriented development contributes to Türkiye's efforts to strengthen its agricultural sector. The data produced by this study can be utilized by politicians, decision-makers, cooperative members, farmers, and other relevant stakeholders.
Equivalent curves in En
(Amer Inst Mathematical Sciences-Aims, 2025) Mollaoğulları, Ahmet; Gümüş, Mehmet; Karalarlıoğlu Camcı, Didem; İlarslan, Kazım; Camcı, Çetin
In this paper, we first define an equivalence relation for curves in En. Based on this equivalence relation, we investigate the relationships between the Frenet frame and curvatures of equivalent curves. Next, we introduce the concept of linearly dependent curvatures in Enand examine its implications for equivalent curves. Building on this concept and the proposed equivalence relation, we present a method to construct (1,3)-Bertrand curves in E4. Additionally, we derive the relationships between the harmonic curvatures of equivalent curves and use these relationships to establish several properties of equivalent helical curves. These results enable systematic construction of curves with prescribed geometric properties.
Mühendis Olmaya Adım Adım
(Çanakkale Onsekiz Mart Üniversitesi, 2022) Aydın, Ganime; Aydın, Ganime
[No Abstract Available]
A comprehensive investigation of PtNPs/PEI N-GQDs nanocomposite: DFT modeling, anticancer activity, and biosensing applications
(Springer, 2025) Altınok Güneş, Buket; Kırlangıç, Ömer Faruk; Kılıç, Murat; Ketenoğlu, Didem; Aslan, Ayşenur; Kabaş, Sultan Yağmur; Kabaş, Afşar; Kaya, İsmet; Yıldız, Mustafa
This research focuses on the synthesis and characterization of a novel nanocomposite, PtNPs/PEI N-GQDs, utilizing FTIR, UV-Vis, SEM, TEM, XPS, and XRD techniques. The study investigates the cytotoxic, apoptotic, and antiangiogenic effects of the nanocomposite on OVCAR-3 cells, aiming to understand the interplay between nanomaterials and cancer. Additionally, the electrochemical properties of PtNPs/PEI N-GQDs-modified glassy carbon electrodes (GCE) are explored, emphasizing analyses of HOMO-LUMO energy levels and band gap energy. Density Functional Theory (DFT) analysis results further support these findings by providing insights into the electronic structure and energetics of the nanocomposite. The nanocomposite exhibits promising electrochemical behavior, demonstrating high capacitance and sensitivity in glucose detection through cyclic voltammetry (CV) and differential pulse voltammetry (DPV) techniques. Selectivity towards glucose among interfering bioanalytes is highlighted, showcasing potential applications in tumor monitoring and diagnosis. Furthermore, the nanocomposite displays significant toxicity against cancer cells, inducing apoptosis and cell cycle arrest. Antiangiogenic effects are also observed, suggesting potential therapeutic benefits. Overall, these findings underscore the multifunctional properties of the synthesized nanocomposite, offering insights into its potential for cancer therapy and biosensor applications for glucose detection in bodily fluids.
Application of a novel anthracene derivative polymer for sensitive voltammetric determination of chloramphenicol in pharmaceutical and food samples
(Pergamon-Elsevier Science Ltd, 2025) Karakaya, Serkan; Kaya, İsmet; Kolcu, Feyza; Dilgin, Yusuf
The application of new polymers for the preparation of modified electrodes is an interesting research area, which is highly significant in the electrochemical antibiotic drug sensors for food safety and environmental sides. Herein, we successfully report the synthesis of a new anthracene-based monomer (N1, N4-bis(anthracene-9-ylmethylene)-2,5-dichlorobenzene-1,4-diamine (ADCA) and Poly(ADCA) modified carbon-based electrode has been used in sensitive and selective differential pulse voltammetric determination of chloramphenicol (CPNL) for the first time. In this platform, the proposed monomer was successfully electro-polymerized onto a cheap, lowcost, and disposable pencil graphite electrode (PGE). The cyclic and differential pulse voltammetric experiments proved that the polymer-modified electrode Poly(ADCA)/PGE) has great electrocatalytic efficiency on the reduction of CPNL. The proposed platform shows a comparable performance in terms of wide linear ranges (2.0-100 and 100-1000 mu M), a low detection limit (0.55 mu M) and high sensitivity (11405 mu A mM- 1 cm- 2) by differential pulse voltammetry (DPV). Additionally, the Poly(ADCA)/PGE exhibited high selectivity and antiinterference facilities for the CPNL. The fabricated sensor showed a promising potential for the determination of CPNL in food (honey, and milk), bottled water, and pharmaceutical (eye ointment) samples with acceptable accuracies and precisions.
Synthesis and characterization of fluorescent and thermally stable poly (azomethine-ether)s: Optical and morphological properties
(Elsevier Sci Ltd, 2025) Tezel, Ruhiye Nilay; Kaya, İsmet
In this work, we described the synthesis and characterization of dialdehyde monomers and poly(azomethineether)s based on them. In the first stage, aromatic bridged dialdehyde monomers were synthesized using 2,4Bis(chloromethyl)-1,3,5-trimethylbenzenedihalide with three different aldehydes (4-hydroxybenzaldehyde, 3methoxy-4-hydroxybenzaldehyde, and 3-ethoxy-4-hydroxybenzaldehyde). Subsequently, corresponding poly (azomethine-ether) derivatives were synthesized through the polycondensation reaction of synthesized dialdehyde monomers with o-toluidine and o-dianisidine diamine compounds. The structures of the obtained dialdehyde and poly(azomethine-ether)s were confirmed by FT-IR, UV-Vis and NMR measurements. The physicochemical properties of the as-prepared poly(azomethine-ether)s have been confirmed through X-ray diffraction (X-RD), field emission scanning electron microscopy (FE-SEM) and energy dispersive X-ray analysis (EDX) spectroscopic techniques. In FT-IR, -CH--N- peak around at 1625 cm-1 attributed to the successful conversion of dialdehydes and diamines into poly(azomethine-ether). The semicrystalline nature of the poly (azomethine-ether)s was shown through the X-RD diffractometer. The optical band gaps were found to be in the range of 2.80-2.92 eV, as measured by UV/Vis analysis. These poly(azomethine-ether)s exhibit direct band gap values in the blue/violet region of visible light, which creates opportunities for future studies related to daylight optoelectronic devices. Additionally, thermal behavior was analyzed using TGA and DSC, revealing that the materials are highly stable and rigid.
Assessment of Soil Contamination by Potentially Toxic Elements Around Fertilizer Factory: An Ecological and Health Risks in Bandırma, NW Turkiye
(Taylor & Francis Ltd, 2025) Parlak, Mehmet; Dengiz, Orhan
Soil pollution is a major global concern, with a worrisome escalation in its prevalence being observed on a daily basis. This phenomenon is influenced by a range of factors, including geogenic and anthropogenic processes. The release of potentially toxic elements (PTEs) from fertilizer factories, which are anthropogenic sources, has the potential to cause soil pollution in the surrounding area. The present study investigates the physicochemical properties, PTEs concentrations, contamination characteristics, potential sources, and human health risks of soil samples collected from the vicinity of the Band & imath;rma fertiliser factory. The soil samples exhibited a range of textures, including sandy clay loam, sandy loam, clay loam, loam, and loamy sand. The mean pH, electrical conductivity (EC), lime, and organic matter contents of the soil samples were found to be 6.89, 0.31 dSm-1, 4.82%, and 5.08%, respectively. Furthermore, the concentrations of the PTEs (Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb and Zn heavy metals) analysed in the soil samples were determined to be between 0.02 and 0.99 mg kg-1, 0.55 and 24.74 mg kg-1, and 0.31 and 34 mg kg-1, respectively. 66 mg kg-1, 4.48 to 423.91 mg kg-1, 2638.61 to 61801.18 mg kg-1, 86.30 to 772.89 mg kg-1, 1.45 to 118.43 mg kg-1, 3.76 to 53.31 mg kg-1, 10.30 to 159.33 mg kg-1, respectively. The enrichment factor indicated that over half of the soils exhibited contamination with Cd and Cu, attributable to industrial activities and the use of agrochemicals. In a similar way, the geo-accumulation index demonstrated that 90.63% of the soils were contaminated with Cu, with all samples also exhibiting contamination with Mn and Zn, and 59.37% with Ni. The ecological risk factor further delineated 9.37% of the soils as exhibiting a considerable degree of risk with regard to Cd, while 3.12% were deemed to present a notable risk with respect to Cu. Of the nine PTEs present in the soil, eight (Cd, Co, Cr, Fe, Mn, Ni, Pb, and Zn) were of natural origin, while Cu was of mixed origin. The THI (total hazard index) values were found to be less than 1 for both children and adults. This finding indicates that there is an absence of non-carcinogenic health risks for both children and adult residents. In addition, the total carcinogenic risk (TCR) values indicated that, with the exception of Cr, there were no carcinogenic risks for children or adults.
Exploring the moderating role of university environmental performance in shaping students' environmental awareness and behaviors
(Emerald Group Publishing Ltd, 2025) Eroğlu, Erdal; Aydemir Dev, Mine; Dalgın, Kübra
Purpose The purpose of this study is to examine the moderating role of university environmental performance in the relationship between students’ environmental awareness and behavior, with a particular focus on the imperative for universities to adopt comprehensive sustainability frameworks. Design/methodology/approach Using a quantitative research methodology, the study administered a survey to 775 undergraduate students from diverse academic departments at a public university. The survey aimed to assess students’ environmental awareness, behaviors and perceptions of university environmental performance. The Mann–Whitney U test, Wilcoxon signed-rank test and Friedman test were applied, and a simple moderation analysis was performed. Findings The results indicate that environmental awareness significantly influences students’ environmental behaviors. Crucially, the perception of environmental performance moderates the relationship between environmental awareness and behavior. The relationship between environmental awareness and environmental behaviors becomes stronger when environmental performance increases. Research limitations/implications While the scope of this research is limited to a single institution, potentially limiting the generalizability of the findings, future studies could extend this investigation to multiple universities to confirm and expand upon these results. Originality/value This research contributes to the existing body of literature by emphasizing the critical role universities play in cultivating students’ environmental awareness and behaviors, and it underscores the importance of institutional environmental performance in promoting sustainable practices within academic environments. Although previous research has explored environmental awareness and behavior, this study offers a unique contribution as it establishes a connection between the awareness-behavior gap and environmental performance.
Environmental and Ecological Risks Posed by Sediment Heavy Metals in Reservoirs: A Preliminary Study from Northwest Türkiye
(Ankara Univ, Fac Agriculture, 2025) Tekiner, Murat; Tuncay, Tulay; Parlak, Mehmet
Reservoir sediments are an important component of aquatic ecosystems. Concentrations, sources, pollution and ecological risks of heavy metals pose serious risks on sustainable management of these ecosystems. This research focuses on heavy metal contents, physicochemical properties, environmental and ecological risks of sediments in four reservoirs (Ayvacık, Bayramdere, Bayramiç, and Umurbey) in Northwest Türkiye. Bayramiç reservoir had greater sediment Al, Cu, Fe, Mn concentrations, clay and silt contents than the other reservoirs (Ayvacık, Bayramdere, and Umurbey). In all four reservoirs, sediment heavy metals were generally of natural origin. Although sediment pollution index was identified as “considerable contamination” for Mn, such a case was not detected for the other heavy metals (Cd, Co, Cr, Cu, Fe, Ni, Pb, and Zn). An ecological risk assessment was made for reservoir sediments and a “low contamination” was detected.

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