Lapseki Meslek Yüksekokulu Koleksiyonu

Bu koleksiyon için kalıcı URI

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

Listeleniyor 1 - 20 / 151

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.
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.
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.
Determination of Genome Size Differentiation and Ploidy Levels in Some Citrus Rootstock Populations
(Kahramanmaraş Sütçü İmam Üniversitesi, 2025) Polatöz, Sefa; Şeker, Murat; Kaya, Çağlar
Determining the ploidy level of plant material used in breeding studies is of great importance, especially for biotechnology applications. The existing genetic diversity in citrus allows the use of rootstocks and varieties that can be adapted to different climatic and soil conditions through different breeding methods. Several suitable rootstocks are used for commercial citrus. This study was conducted to determine the genome size and ploidy levels of citrus rootstocks widely used worldwide using flow cytometry. The rootstocks used in the study included Gou-Tou, C-35, Troyer citrus, Taiwanica, Citremon, Yuzu, Sunki mandarin, Flying Dragon, Yuma citrus, Macrophylla and Chinese orange. Fresh leaf tissue from each rootstock was mixed with triploid Tahitian lemon leaf tissue, used as a standard species, and cell nuclei were isolated. The cells stained with propidium iodide were analysed by flow cytometry, and histograms and cytograms were obtained. According to the results, although all species had diploid genome sizes, differences were observed between species in terms of genome volume. Yuzu seedlings were found to have the largest genome size (0.808 pg/2C), while Flying Dragon trifoliate had the smallest genome size (0.700 pg/2C).
Effects of Drip Irrigations with Different Irrigation Intervals and Levels on Nutritional Traits of Paddy Cultivars
(MDPI, 2025) Çiftci, Beyza; Kardeş, Yusuf Murat; Varol, İhsan Serkan; Taş, İsmail; Akçura, Sevim; Coşkun, Yalçın; Karaman, Kevser; Akçura, Mevlüt
Rice serves as the primary food source for the majority of the world's population. In terms of irrigation water, the highest volume of irrigation water is utilized in paddy irrigation. Excessive water use causes both waste of limited water resources and various environmental problems. The drip irrigation method with high water use efficiency will reduce both the need for irrigation water and the environmental footprint of paddy production. This study was conducted to investigate the effects of two different irrigation intervals (2 and 4 days) and four irrigation levels (150%, 125%, 100%, and 75% of evaporation from a Class-A pan) on the nutritional traits of three different paddy cultivars (Ronaldo, Baldo, and Osmanc & imath;k). Increasing irrigation intervals and decreasing irrigation levels reduced the nutritional properties (protein, oil, starch) of the rice grains. In addition, increasing irrigation levels also increased the phytic acid and dietary fiber contents. The highest protein (7.14%) and total starch (87.10%) contents were obtained from the 150% irrigation treatments. The highest amylose content (20.74%) was obtained from the 75% irrigation treatment. In general, it was found that irrigation levels should be applied at 125% and 150% to increase the mineral content of rice grains. Although water deficits decreased the nutritional properties of the paddy cultivars, drip irrigation at an appropriate level did not have any negative effects on nutritional traits.
Assessing the Aromatic and Quality Components of a Novel Peach Genotype ('Sırrı') Grafted onto Various Rootstocks in the Lapseki Area
(MDPI, 2025) Gür, Engin; Gündoğdu, Mehmet Ali; Yılmaz, Neşe; Şeker, Murat
This study examines how various rootstocks affect the pomological, biochemical, and aroma contents of the local ‘Sırrı’ peach genotype grown in the Lapseki region of Türkiye. The research focused on peach trees grafted onto three distinct rootstocks: ‘Seedling’, ‘GF-677’ (P. persica × P. amygdalus), and ‘Rootpac-R’ (P. cerasifera × P. amygdalus). The results showed that peaches from the ‘Seedling’ and ‘GF-677’ rootstocks had larger sizes, greater weights, and brighter colors compared to those from ‘Rootpac-R’. Furthermore, the rootstocks impacted essential quality factors such as soluble solid content, firmness, fruit–flesh ratio, titratable acidity, and total phenolic content levels. The analysis of volatile compounds indicated that aldehydes (which varied from 67.02% to 63.74%), lactones (which changed from 9.14% to 7.99%), and esters (which changed from 12.51% to 11.92%) were the major aroma types in ‘Sırrı’ peaches, with the ‘GF-677’ rootstock exhibiting amplified fruity and sweet aromas due to increased lactone levels. Principal Component Analysis (PCA) revealed the significant effects of rootstocks on both pomological and biochemical characteristics, with ‘Seedling’ showing elevated biophenol levels and ‘GF-677’ contributing to a firmer texture. These findings underscore the importance of rootstock choice in enhancing fruit quality and aroma, indicating that the ‘Sırrı’ genotype is highly suitable for commercial production and future breeding efforts.
Cyber security policies in Türkiye
(Nova Science Publishers, Inc., 2024) Avaner, Tekin; Fedai, Recep
In this study, activities carried out for information security in the world and in Türkiye within the framework of information security policy will be discussed. The importance of information security policy has increased even more after cyber-attacks around the world. In this context, the study will include various cyber-attacks, and the measures taken against cybersecurity attacks will be analyzed through an information security policy. The ENISA reports prepared within the framework of the European Union's cyber security policy will be included, and the actors and their activities involved in the construction process of Türkiye's national information security policy will be evaluated. The cyber-attacks experienced in Türkiye will also be touched upon, and the mechanisms developed, official policy documents, and the activities of the actors will be analyzed. The main problem encountered in this context will be the various difficulties in the construction of the national information security policy. The solution to the problem is to focus on which mechanisms the state, which is at the center of the information security policy process, has developed structurally and functionally. In this regard, elements of the management process come to the fore. An information security management system consists of steps such as planning, implementation, control, and taking precautions.
Reducing respiration rate and increasing chemical stability of mulberry fruits by using postharvest putrescine and melatonin
(BioMed Central Ltd, 2025) Eyduran, Şadiye Peral; Çolak, Ayşen Melda; Kuru Berk, Selma; Sakaldaş, Mustafa; Şen, Fatih; Gündoğdu, Muttalip
Background: Plant growth regulators have been widely used to extend the cold storage period of fruits and preserve quality. These phytohormones help mulberry fruit in maintaining its postharvest quality and soft texture, prevent from spoiling during cold. For this purpose, mulberry fruit were stored in cold for 5, 10 and 15 day (0.5 °C and 90% RH) and the impacts of melatonin (1.0 mM) and putrescine (1.0 mM) on quality parameters, phenolic compounds (gallic, protocatechuic, catechin, syringic, p-coumaric, chlorogenic, o-coumaric, ferulic, phloridzin, rutin and quercetin) and organic acids (malic, citric, succinic, oxalic, tartaric, fumaric and ascorbic) were investigated. Results: The combined application of putrescine and melatonin maintained the weight loss (4.35%), decay rate (9.48%) and 29.89% lower respiration rate (6.07 mg CO2 kg− 1 h− 1) in mulberry fruits stored for 15 d as compared to the control. Phenolic compounds (especially rutin) and organic acids were found to be more affected by melatonin and putrescine applications compared to other findings in this study. However, melatonin treatment is more effective in maintaining the level of organic acids and phenolic compounds in mulberry fruit during storage than the putrescine. It was determined that soluble solids content, weight loss, decay rate and pH values had a positive relationship with each other. Also, it was also seen that phenolic compounds and organic acids had a linear relationship. Conclusion: The combined application of melatonin and putrescine was found more effective in maintaining the quality parameters of mulberry fruits during cold storage.
Air quality suitability map of Çanakkale urban area (CBS based): ımportance of green spaces
(Springer Nature, 2025) Alkan, Yavuz
Çanakkale is a city with increasing population linked to uncontrolled internal and external migration due to its historical structure and geopolitical situation. Developments in the physical and social structure of the city kept the design of a suspension bridge, which was considered necessary to be built across the Çanakkale Straits (Dardanelles) since the 1990s, alive until 1917. The traffic, industrialization, uncontrolled housing and inadequate environmental planning expected with the opening of the 1915 Çanakkale Bridge, with construction beginning in 2017 and planned for completion in 2022, have recently led to Çanakkale being investigated in terms of air pollution, especially. In this study, emerging as unique at this point, the atmospheric component potential was researched within the scope of 4 counties in Çanakkale province. Air quality maps were obtained for Çanakkale by analyzing the atmospheric component (CO, SO2, NO2, NOX and particulate matter) amounts for July and August of 2021 with GIS modelling. According to the suitability mapping, the Central, Lapseki and Çan regions, with nearly 653.41 km2 area, had suitable air quality, while Biga region with 1043.8 km2 area was not suitable. In conclusion, the study includes strategy development, action plans and recommendations like tax implementations and green space planning for priority preservation and optimization of air quality with the aim of sustainable urban development.
Preparation of composite hydrogels containing fly ash as low-cost adsorbent material and its use in dye adsorption
(Springer Science and Business Media Deutschland GmbH, 2022) Önder, Alper; Ilgın, Pınar; Özay, Hava; Özay, Özgür
Abstract: Recycling industrial wastes is necessary for the economy and the environment. Additionally, it is important to develop high-efficiency adsorbents to prevent severe water pollution caused by wastewater containing dye agents. Here, poly(2-acrylamido-2-methylpropane sulfonic acid)-fly ash composite hydrogel was synthesized with a variety of fly ash proportions with the radical polymerization method. The synthesized composite hydrogel was used for adsorption of methylene blue and methyl orange dyes from water containing dye agents. A variety of parameters such as initial dye concentration, solution pH, anion effects, temperature, contact time and adsorbent amount were investigated for optimization of the adsorption process. The poly(2-acrylamido-2-methylpropane sulfonic acid)-fly ash composite hydrogel was determined to be an effective adsorbent to remove both the cationic dye methylene blue (1438.68 mg g−1) and the anionic dye methyl orange (646.54 mg g−1). Experimental adsorption data were assessed with a variety of isotherm and kinetic models. It was determined that the adsorption of both dye molecules abided by the pseudo-second-order kinetic model. The thermodynamic parameters were determined as ΔH° = − 15.77 ± 5.22 kJ mol−1, ΔS = − 45.05 ± 16.42 J mol−1 K−1 and ΔG° < 0 for MB, ΔH° = − 20.13 ± 4.83 kJ mol−1, ΔS = − 72.87 ± 15.20 J mol−1 K−1 and ΔG° > 0 for MO. In conclusion, a material was synthesized that can be used as a single adsorbent composite material for both anionic and cationic dyes. In addition to the perfect adsorption capacity of this material, it offers reusability and a broad area of application for a variety of dye agents.

Güncel Gönderiler