Çanakkale Teknik Bilimler Meslek Yüksekokulu Koleksiyonu

Bu koleksiyon için kalıcı URI

https://hdl.handle.net/20.500.12428/3540

Listeleniyor 1 - 20 / 90

Development of Stable Microemulsions Containing Laurel Essential Oil Using Amylopectin and Gum Arabic as Natural Emulsifiers
(Wiley, 2025) Berber, Mehmet Mert; Çelebi Uzkuç, Nesrin Merve; Uzkuç, Hasan; Tarhan Kuzu, Kübra; İşleten Hoşoğlu, Müge; Özmen Togay, Sine; Kırca Toklucu, Aysegül; Karagül Yüceer, Yonca; Kurt, Saliha B.; Şahiner, Nurettin
This study aimed to develop food-grade microemulsions of laurel essential oil (L-EO) (MEs) stabilized with amylopectin (L-AP) and gum arabic (L-GA) and to determine characteristic properties of the MEs at different pH and temperatures during storage. L-EO was extracted using the microwave-assisted hydrodistillation technique. The prepared ME droplets ranged in size range from 328 to 347 nm in L-AP (pH 6.0) and from 327 to 432 nm in L-GA (pH 3.0). The total phenolic content and antioxidant capacity were 170.60 mg/L gallic acid equivalent (GAE) and 0.93 mM Trolox/mL in L-AP, respectively, while total phenolic content was 243.10 mg/L GAE and antioxidant capacity was 1.19 mM Trolox/mL in L-GA. Additionally, the MEs demonstrated relatively potent antimicrobial activity against Escherichia coli, Bacillus cereus, and Staphylococcus aureus strains. The main volatile compounds of L-EO were identified as 1,8-cineole (33.4%), sabinene (8.4%), and linalool L (6.6%).
From Wastewater to Worth: Eco-Friendly Nanoparticle Synthesis Based on Microalgae Cultivated in Industrial Wastewater
(Wiley-V C H Verlag Gmbh, 2025) Kayan, İremsu; Şenol Bahçeci, Dilek; Güleç, Neslihan; Dalgıç, Büşra; Ayman Öz, Nilgün
Silver nanoparticles (AgNPs) were synthesized in this study through the utilization of microalgae (MA). The bioactive compounds included in microalgae make them natural antibacterial and antifungal agents. However, cultivating microalgae typically necessitates specialized medium, hence elevating expenses. Consequently, to lower costs, this study utilized industrial wastewater, specifically cheese whey wastewater (CWW). Therefore, a form of wastewater recycling has been accomplished, and a sustainable production process has been implemented. Silver nanoparticles were synthesized using Nannochloropsis sp., a type of microalgae, by the green synthesis process. Silver nanoparticles (MA + AgNPs, CWW + MA + AgNPs) derived from microalgae cultivated in both pure and cheese whey media have been synthesized. Transmission electron microscopy (TEM) examination and Fourier transform infrared spectroscopy (FT-IR) measurement have been conducted to observe the production of silver nanoparticles. Their biological actions have been compared. The results indicate that silver nanoparticles derived from microalgae exhibit significant antibacterial activity (inhibition zones up to 17 mm and minimum inhibition concentration [MIC] values down to 31.25 mu g/mL). The characteristics of silver nanoparticles derived from microalgae that influence antioxidant activity and DNA damage have been effectively demonstrated. This study reveals the biotechnological potential of microalgae and the environmental advantages of utilizing wastewater. These in vitro findings show that microalgae-derived nanoparticles display wide-spectrum antimicrobial activity even at very low concentrations and when this is considered in terms of sustainable production process, the mentioned nanoparticles may be promising materials that can be used in future medical and industrial application.
Microwave-assisted graft copolymerization effects on the material properties of polyhydroxybutyrate-cellulose nanocrystal nanocomposites
(Springer, 2025) Al, Gülyaz; Aydemir, Deniz; Altuntaş, Ertuğrul
This study examined the influence of polyhydroxybutyrate grafted maleic anhydride (PHB - g - MA) copolymer on the mechanical, structural, thermal, morphological, and rheological properties of polyhydroxybutyrate (PHB)-cellulose nanocrystal (CNC) nanocomposites. The results showed that the adding PHB - g - MA and CNCs had a positive effect on the mechanical and morphological properties of the BNCs (biopolymer nanocomposites). According to the DSC results, there were slight changes in the crystallization temperature (Tc) and the melting temperature (Tm) of the BNCs, and the DMA curves showed that the inclusion of PHB - g - MA resulted in an increase in the storage and loss moduli. The XRD results showed four main peaks with 2 theta values of 13.57 degrees, 16.98 degrees, 22.2 degrees, and 25.39 degrees with the presence of both PHB - g - MA and CNCs. In rheological studies, it was determined that both elastic and viscous moduli of the neat PHB and the BNCs generally increased as the frequency value was raised.
Ozone Pretreatment and Equilibrium-Modified Atmosphere Packaging as Elicitors to Enhance Shelf Stability and Nutraceutical Retention in Fresh Aronia (Aronia melanocarpa cv. Nero) Berries
(Springer, 2025) Aşık, İrem; Caner, Cengiz; Yüceer, Muhammed; Uysal Pala, Çiğdem
Ozone application is recognized for its eco-friendly, efficient, and cost-effective nature, making it a practical and prospective approach for increasing the storability of fresh produce. This study researched the synergistic impacts of ozone (5, 10, and 20 ppm) pretreatment and equilibrium-modified atmosphere packaging (EMAP) on the postharvest quality parameters of organic-labeled fresh aronia berries (Aronia melanocarpa cv. Nero) for 120 days at 4 °C. The key quality parameters are the composition of the gas in trays, weight loss, total soluble solids, pH, surface color, texture profile, spoilage rate, bioactive contents, and antioxidant properties. By the end of storage, the ozonated groups (10–20 ppm) showed significantly reduced spoilage rates of 6–8%, respectively, compared to 12–19% in the untreated control groups (P < 0.05). The combination of 5–10 ppm ozone pretreatment and sealing with microperforated polypropylene (PP) film was significantly effective in inhibiting fruit softening and retaining hardness at 379–375 gf, respectively, approximately a 16% reduction from initial values, which was significantly better than the 25% loss observed in the microperforated control (P < 0.05). Anthocyanin extractability significantly increased with 20 ppm ozone treatment (627 mg cyn 3-glu/100 g) when compared to untreated control groups (472 and 476 mg cyn 3-glu/100 g) on the initial day (P < 0.05). Among all the application groups, the 10 and 20 ppm ozone pretreatment groups demonstrated significant potential for preserving anthocyanins in aronia berries during storage. Additionally, ozone pretreatment positively influenced antioxidant properties based on CUPRAC values. These outcomes underline that the combination of ozone pretreatment and microperforated PP lid film packaging significantly enhances the cold storage stability and nutraceutical qualities of aronia fruits.
Experimental performance comparison of triangle and spur gear hydraulic pumps energy consumption efficiency standpoint
(Springer, 2025) Yazar, Mehmet
This study aimed to experimentally compare the energy consumption performances of widely used hydraulic spur gear pumps and lesser-known triangular gear pumps. Flow rate, pressure, temperature, and energy consumption are key performance indicators for evaluating the operational efficiency of gear pumps. The effect of pump drive shaft speed and pump type (spur and triangular) on these output variables and energy consumption performance was examined, and regression analysis was performed. For this purpose, both pumps were tested under identical conditions using hydraulic oil (SAE 10W) as the working fluid, with drive shaft speeds ranging from 100 to 1600 rpm. Measurements were taken at 100 rpm intervals for fifteen minutes and repeated four times. The system included an energy analyser, pressure sensors, flow meters, and temperature sensors to record real-time data during pump operation. The findings show that the triangle gear pump consumes an average of 1.86% less energy at all speeds, provides 7.11% higher flow rate, produces 161.39% higher pressure, and has 18.17% less temperature rise compared to the spur gear pump. In addition, it has been experimentally proven that the triangle pump consumes an average of 47% less energy when unit flow rate and unit pressure production are taken into consideration. Moreover, it was observed that the triangle gear pump exhibits 12.94% and 51.20% less temperature change during operation, depending on the unit flow rate and unit pressure, respectively. These experimental results, obtained under controlled laboratory conditions, suggest that triangular hydraulic gear pumps are a viable alternative to conventional spur gear pumps in industrial applications due to their lower energy consumption and improved flow and pressure characteristics.
Novel bis-ball-type double-decker phthalocyanines containing symmetric di-schiff base derivatives: Synthesis, spectroscopy, and photophysicochemical properties
(Elsevier, 2025) Mutlu, Fatih; Öztürk, Ömer Faruk; Pişkin, Mehmet
In this study, novel symmetric bis(oxy)-diphthalonitrile derivatives carrying di-Schiff base groups were designed and synthesized for various applications, including pharmaceuticals and photocatalysis. The compounds, 4,4′-((((1E, 1′E)-(1,4-phenylenebis(azanilylidene) bis(methanylylidene) bis(6‑methoxy-2,1-phenylene))bis(oxy))di-phthalonitrile) (2), and their ball-type bis-metal-free (3) and lutetium(III) phthalocyanine complex derivatives (4), were characterized by elemental analysis, FTIR, 1H NMR, 13C NMR, MALDI-TOF MS, and UV–vis spectroscopy (for bis-ball-type double-decker phthalocyanines 3 and 4). The solubility and aggregation behaviors of 2 and 3, containing electron donor and acceptor groups in the symmetric di-Schiff base framework, were studied in various solvents: polar protic, aprotic, "borderline" polar aprotic, and non-polar. These bis-ball-type double-decker phthalocyanine derivatives exhibited high solubility without aggregation in all solvents studied, except hexane for 3 and 4, and water and toluene for 3. To assess their potential as photosensitizers for photocatalytic applications, their photophysical properties in DMSO and photochemical properties in DMSO and DMF were investigated. These bis-ball-type double-decker phthalocyanine derivatives exhibited absorption bands with high molar extinction coefficients in the therapeutic window, along with low but sufficient fluorescence quantum yields, lifetimes, and intersystem crossing probabilities. They also displayed adequate singlet oxygen production and high photostability. These photophysical and chemical properties make them promising candidates for various photocatalytic applications, including biological and biomedical imaging.
Lifestyle and eating behaviors during the COVID-19 pandemic: a cross-sectional study in Turkey
(Bmc, 2025) Caner, Cengiz; Can, Aygül; Yüceer, Muhammed
The COVID-19 pandemic significantly influenced individuals’ lifestyles, eating behaviours, and food ordering purchasing practices, potentially altering overall dietary patterns. This study aimed to determine lifestyle and eating behavior among Turkish adults during COVID-19. A survey was conducted in 2023 in Çanakkale using a Google Forms questionnaire to collect data from 365 Turkish individuals on sociodemographic factors, lifestyle, food purchasing habits, and dietary routines during the pandemic. Kruskal–Wallis tests were used to determine compare continuous variables across multiple groups. Findings revealed that 52.1% of participants experienced weight gain, 68.7% reported sleep disturbances, and exercise frequency declined during the pandemic. Conversely, smoking and alcohol consumption habits remained largely unchanged in about 60% of individuals. Employment status was found to significantly influence most lifestyle variables (p < 0.05). Regarding food shopping, 70.7% preferred chain supermarkets, while 46% engaged in online shopping, primarily for meat (47.7%) and snacks (27.4%). Online purchasing was significantly associated with age, education level, and employment (p < 0.05). A strong preference for homemade meals (94.8%) was also reported. In terms of dietary patterns, 58.1% maintained water intake, while 57.1% increased tea/coffee consumption. Daily meal frequency remained unchanged in 57.9%, yet notable increases were seen in the consumption of dairy/eggs (39.6%), fruits (38.4%), bread/pasta (34.1%), and meat (22.6%). About half reported greater intake of nutrient-dense foods, desserts, and snacks. This study reveals how COVID-19 affected dietary behaviors in Türkiye, highlighting the need for targeted interventions and offering valuable insights to guide healthier lifestyle promotion and future health emergency planning.
Non-destructive estimation of wood density in standing Pinus brutia trees using the drilling resistance method: results and insights
(Univ Bio-Bio, 2025) İçel, Bilgin
In recent years, the use of drilling resistance method and devices which operate based on the method for non-destructive evaluation of wood has expanded, but research for density evaluation on standing trees remains limited. The study aimed to assess the effectiveness of the method through a device (IML RESI F500-S) in estimating wood density for standing Turkish red pine (Pinus brutia) trees. Increment core samples and measurement data were collected from stands of various ages and types in the Mediterranean region of T & uuml;rkiye. Wood density data determined by x-ray densitometry were compared with estimates derived from charts of the device. The effect of drilling path direction was investigated on a group. Results showed that linear modelling by using the device data (obtained only by following the device manual) was moderately successful (r2 approximate to 0,62) in estimating density for only a sampling group (S1: Consisting of trees at different age, on different diameter etc.; range of density: 0,270 g/cm3; coefficient of variation:11 %). However, the other investigated group (S2), which had lower density variation due to less individual differentiation in terms of age, diameter etc., did not reveal a successful linear model. Solely the results for the subgroup 6th, showing lower density range than S1, demonstrated that even with lower density variation (cv approximate to 7 %), standing tree wood density could be non-destructively estimated by a linear model (r2=0,72) using the device data. However, the data of the group obtained by using increment cores to ensure proper alignment of the drilling. In this case accurate estimation required a drilling path perpendicular to annual rings and passing through the pith, but the current form of the device or such devices are unable to meet the requirement. The drilling resistance method has potential use in tree selection. To improve the device's accuracy, future research should focus on developing techniques or modifications of such device to ensure more consistent and reliable drilling paths for standing trees.
Integrating Long-Term Climate Data into Sponge City Design: A Case Study of the North Aegean and Marmara Regions
(Mdpi, 2025) Kızılaslan, Mehmet Anıl
Climate change is altering hydrological regimes across the North Aegean and Marmara regions of Türkiye, with increasing relevance for both drought occurrence and flood generation. This study examines long-term variability in temperature, precipitation, and evaporation using meteorological observations over a long time series and relates these changes to urban water management issues. Daily records from 12 meteorological stations, with data availability varying by station and extending back to 1926, were analysed using the non-parametric Mann–Kendall trend test and Sen’s slope estimator. The results indicate statistically significant warming trends across all stations, with several locations recording daily maximum temperatures exceeding 44 °C. Precipitation trends exhibit pronounced spatial heterogeneity: while most stations show decreasing long-term tendencies, others display unchanging or non-significant trends. Nevertheless, extreme daily rainfall events exceeding 200 mm are observed at multiple coastal and island stations, indicating a tendency toward high-intensity precipitation. Evaporation trends also vary across the region, with increasing rates at stations such as Tekirdağ and Çanakkale and decreasing trends at Bandırma and Yalova, reflecting the influence of local atmospheric conditions. Taken together, these findings point to a coupled risk of intensified flooding during short-duration rainfall events and increasing water stress during warm and dry periods. Such conditions challenge the effectiveness of conventional grey infrastructure. The results are therefore interpreted within the framework of the Sponge City approach, which emphasizes permeable surfaces, decentralized storage, infiltration, and the integration of green and blue infrastructure. By linking long-term hydroclimatic trends with urban design considerations, this study provides a quantitative basis for informing adaptive urban water management and planning strategies in Mediterranean-type climate regions.
MAGNETOHYDRODYNAMICS FLOW IN DOUBLE-LID L-SHAPED CAVITY WITH LOCAL REFINEMENT
(Bulgarian Acad Sciences, Inst Mechanics, 2025) Çelik, Ebutalib; Gürbüz-Çaldağ, Merve
This study presents new insights into structures of magnetohydrodynamics flow in a double lid-driven L-shaped cavity under an oriented magnetic field. The governing equations are presented using the stream functionvorticity approach and solved numerically. Radial basis function-finite difference method utilizing polyharmonic splines is proposed to achieve local refinement. Flow topologies are examined for problem parameters, including the inclination angle, Hartmann number, and Reynolds number. The results indicate that as the strength of the magnetic field increases, the Lorentz force becomes the dominant factor, making the impact of the Reynolds number on flow negligible. The strength and inclination angle of the magnetic field play crucial roles in influencing the flow structure by altering the number, position, and type of critical points.
The Individual and Combined Effects of Electrolyzed Water and Chitosan Coating Applications on the Storage Stability of Fresh Strawberries
(Springer, 2025) Yumak Alnıak, Nesrin; Caner, Cengiz; Yüceer, Muhammed
Fresh strawberry is very susceptible to spoilage and has limited storage stability due to its fast metabolism. The main focus of this research was to evaluate if electrolyzed water (EW) (30 ppm or 90 ppm) and 1% chitosan coating can be applied individually and in combination to evaluate individual and synergistic effects on extending the storage stability of fresh strawberries. The samples were analyzed (the gas composition, pH, degrees Brix, weight loss, spoilage rate, texture as well as total anthocyanin and total phenolic composition) for the 5 weeks at 4 degrees C. At the end of storage, the O2 in the trays reduced from 21 to 13% in the groups treated with chitosan, and the CO2 ratio increased from 0.03 to 14%. The most dramatic change in gas exchange, pH, and degrees Brix occurred in the control group during storage. The decrease was less in the chitosan-coated ones. Although there is no linear change in color values (L* and a*), it can be said that EW application has a more conservative feature, especially on a*. At the end of the storage, the combination of chitosan and EW had a spoiled fruit rate of 25-30% by weight, while this rate reached 67% in the control group. The hardness value of strawberries decreases throughout storage. Although there was a decrease in total anthocyanin and total phenolic components during the 5 weeks of storage, the highest protection was measured in samples where chitosan and EW were applied together. As a result of this study, the remarkable synergistic efficacy carried out by the combined application of the chitosan coatings and the EW (30 ppm or 90 ppm) makes it an attractive promising sustainable substitute for artificial preservatives while maintaining their fresh-like quality and improved appeal within the food industry.
The efficiency of Thermosonication, Ultrasonication and pasteurization on the storage stability of fresh eggs
(Elsevier Sci Ltd, 2025) Caner, Cengiz; Gedikoğlu Arslan, Pınar; Yüceer, Muhammed
The effectiveness of ultrasonication (90 W 3.5 min.), thermosonication (52 degrees C, 90 W 3.5 min.), and pasteurization (57.5 degrees C, 25 min.) processes on the quality attributes (HU as Haugh unit, YI as yolk index, dry matter, pH, foam stability and relative foam capacity) and shell strength of fresh eggs were evaluated during storage period. The significant differences in HU values between the untreated group and the treated eggs began to be observed from the day-10. The significant differences were found in the HU both in the untreated group (47.95) and in the eggs treated with ultrasonication (55.56), thermosonication (63.64), and pasteurization (73.28), with the highest HU value found in the pasteurized eggs at day-30. It was observed that thermosonication treatments maintained higher YI values compared to the untreated group, with significant differences between the values. The pH of the albumen and yolk at all groups increased in the highest value with control (albumen 9.44 - yolk 6.44), ultrasonication (albumen 9.35 - yolk 6.34), thermosonication (albumen 9.37 - yolk 6.41), and pasteurization (albumen 9,40 - yolk 6.35). The albumen dry matter values tended to increase in all groups during the storage, with the lowest dry matter results observed in the ultrasonicated samples. The relative foam capacity (RWC) value of the eggs treated with ultrasonication (796) was higher than those of the control (626), thermosonication (735), and pasteurization (680) groups. It was highlighted that thermal treatment led to a decrease in the RWC values at day-30. The lowest shell strength values were observed in the thermosonication samples due to both the cavitation mechanism and heat. This study demonstrated that thermosonication process is efficacious in maintaining the quality attributes of the fresh shell eggs. It was found that the combination of ultrasound with heat particularly improved quality characteristics such as HU and YI. Thermosonication applications could be an important and effective alternative for enhancing the internal-quality attributes and increasing the storage stability of eggs.
Synthesis, molecular, and photophysicochemical characterizations of phthalocyanine dyes containing sodiumsulfonatenaphthalen-2-olate groups
(Elsevier, 2025) Saruhan, Serkan; Pişkin, Mehmet; Özturk, Ömer Faruk; Odabaş, Zafer
In this study, novel highly water-soluble 6-sodiumsulfonatenaphthalen-2-olate substituted phthalocyanines from the organic near-infrared dye class and contained zinc(II) or indium(III) metal ions in their cavity, were designed, and synthesized to explore their potential use as photosensitizers in photodynamic therapy. The molecular structures of the starting materials and dyes were characterized using elemental analysis, FT-IR, UV-vis, 1H-NMR, 13C-NMR, and MALDI-TOF mass spectrometry. The solubility and aggregation behaviors of these phthalocyanine dyes have been investigated in polar solvent types such as dimethylsulfoxide and N,Ndimethylformamide, ethanol, methanol, and water, as well as in phosphate-buffered saline. They have high solubility in the studied solvents and do not show any tendency to aggregate, except for water. Their photophysical and photochemical properties were investigated in N,N-dimethylformamide. The influence of the presence and position of substituents on their macrocyclic and the nature of the metal species in their cavities on their photophysical and photochemical parameters were reported. The fluorescence properties of the zinc(II) dyes studied were enhanced, while those of indium(III) dyes were low but sufficient as photosensitizers. The suitable and sufficient photophysicochemical properties of the water-soluble near-infrared new phthalocyanine dyes denote they can be potential candidates as Type II photosensitizers for photocatalytic applications.
Efficacy of Chitosan-Cloisites-Nanocomposite as Sustainable Coatings on Storage Stability of Fresh Eggs
(Wiley, 2025) Atakan, Orhan; Caner, Cengiz; Yüceer, Muhammed
Fresh eggs can quickly lose their high quality if the necessary care is not taken during storage. Biocoating the fresh eggs may be a valuable option. The current study focused on developing sustainable chitosan biocoatings by adding different Cloisite clays (Cloisite 15A, 20A, and 30B) into chitosan biocoatings to seek enhancement effects on the fresh eggshell storability. The variables measured were weight loss (WL), Haugh unit (HU), yolk index, pH measurements, soluble solids, relative whipping capacity and foam stability, color analysis, lipid oxidation, viscosity, and eggshell breaking strength. The coatings increased the eggshell's storability by sealing its pores, which decreased breakage and minimized mass transfer. As a result, the lower WL occurred in the Cloisite-coated groups. The WL, which was 6.63% in the control group, was 3.63% in the group coated with chitosan-Cloisite15A combination at week 4. The HU of samples with chitosan-Cloisite15A and chitosan-Cloisite20A (60.14) had the highest HU, significantly. Chitosan-Cloisite 30B (58.78), pure chitosan (53.85), while the control (45.60) was the lowest HU. The TBARS values were measured as follows: control 1.01; chitosan 0.61, chitosan-Cloisite15A 0.39, chitosan-Cloisite20A 0.42, and chitosan-Cloisite30B 0.47 mg of malondialdehyde/kg. Cloisite15A were found to be the most effective for improving storage stability and Cloisite30 B for enhancing breaking strength. Biocoatings with Cloisite (15A, 20B, and 30B) could enhance qualities for at least 2 weeks longer.
Use of Chitosan-Coated Conductive Copper/Nanoparticle Polymer in Drug Delivery System by Encapsulation Method
(Maik Nauka/Interperiodica/Springer, 2024) Şenol Bahçeci, Dilek; Kocaeren, Aysel Aydın; Demir, Neslihan; Dalgıç, Büşra
In this study, 4-amino-3-hydroxy-1-naphthalenesulfonic acid was polymerized by the oxidative polymerization method. Copper nanoparticles of the synthesized PSa were prepared with copper sulfate solution. Structural analysis of the synthesized compounds were determined by FTIR, H-1 NMR and C-13 NMR measurements. Its optical properties were measured by UV-Vis spectrophotometer, thermal analysis by Thermogravimetric Analysis (TG) device, morphological properties by scanning electron microscope (SEM) device, and crystallographic properties by X-ray Diffraction (XRD) device. Additionally, HOMO-LUMO band gaps were calculated by determining oxidation-reduction peak potential values with the Cyclic Voltammetry (CV) device. Since CuNPs@PSa shows very good antimicrobial properties against some yeasts and bacteria, its usability in drug release was investigated. For this, Ch-CuNPs@PSa encapsulation study was carried out by coating CuNPs@PSa with chitosan (Ch). Encapsulation efficiency, loading capacity, and in vitro release kinetics were calculated. As a result, it was observed that chitosan encapsulation increased the antimicrobial effect against bacteria and yeasts and achieved the release in a controlled manner. It has been determined that Ch-CuNPs@PSa can be used in drug delivery systems as it has an Encapsulation Efficiency (EE) of 98.70%, a Loading Capacity (LC) of 78.96% and a cumulative release of 98.84%. In this case, it can be said that the obtained Ch-CuNPs@PSa can be evaluated as effective in drug release studies.
Trends in Sustainability and Innovative Food Packaging Materials: An Overview
(Sidas Medya A.S., 2024) Caner, Cengiz; Yüceer, Muhammed; Harte, Bruce
Globally, 1.3 billion tons of food are wasted or lost every year. This loss is valued at US $2.6 trillion and accounts for 8-10% of greenhouse gas emissions (GHG). Food waste is a significant source of greenhouse gas emissions and results in a waste of natural resources. Therefore, reducing food waste can help diminish GHG emissions, improve food security, and promote healthy food systems. Packaging plays an important role in protecting food, enhancing quality and safety, and reducing food losses. Innovative and sustainable packaging strategies are necessary to decrease waste accumulation, particularly of plastics, safeguard food quality and safety, and reduce food losses and waste. Sustainable packaging aims to enhance the effectiveness of design and the use of environmentally friendly materials. This review provides an overview of the sustainable status of common packaging materials such as plastic, glass, metal, and paper/cardboard based on the circular economy, which includes recycling, reuse, composting, and bio-based packaging. The study examines new developments in food packaging materials in response to the growing demand for environmentally sustainable alternatives. Several applications from food companies and sustainable studies are discussed regarding continuous availability without impacting the environment. Ongoing research and technological advancements, such as material reduction, the development of innovative new materials like bioplastics, and improvements in recycling, will contribute to increasing the acceptance of sustainable packaging. Definitions, requirements, limitations, legislation, and applications of sustainable packaging are explored. Sustainable packaging can stimulate economic growth and offer new opportunities for companies, notably by helping the environment and reducing the carbon footprint. However, the cost of sustainable packaging can still be challenging for small businesses. Determining whether consumers are willing to pay more for sustainable packaging is also crucial in this transition. © 2024 Sidas Medya A.S.. All rights reserved.
Kripto Varlık Özelinde Üniversite Öğrencilerinin Blok Zincir Teknolojisi Bilgi Düzeylerinin İncelenmesi
(2024) Demir, Ümit; Uğurlu, Bora; Ataç, Sezgin
İnternet ve bilişim teknolojileri araçlarında meydana gelen gelişimler gelişmeler birçok alan ve işkolunun yeniden düzenlenmesine hem olanak sağlamış hem de zorunlu kılmıştır. Blok zinciri kavramı ülkemizde kripto varlıklar ile bilinirliği artan bir kavram olsa bile bilgi güvenliğinin esas olduğu dağıtık yapıda birçok sektörde gelişme potansiyeli bulunmaktadır. Bu nedenle blok zincir kavramının farklı alanlarda kullanımına yönelik bilgi yeterliliğinin önemli olduğu düşünülmektedir. Bu kapsamda gerçekleştirilen bu çalışma ile 344 lisans ve önlisans öğrencinin katılımı ile üniversite öğrencilerinin kripto para özelinde blok zinciri teknolojisine yönelik bilgi düzeylerini belirlenmesi amaçlanmıştır. Elde edilen veriler ışığında öğrencilerin çoğunun blok zinciri konusunda az ya da hiç bilgi sahibi olmadığı sonucuna ulaşılmıştır. Fakat öğrenciler kripto varlıklara yatırım düzeylerinin yüksek olduğu görülmüştür. Ayrıca öğrencilerini kripto varlıklara yatırım konusunda olumlu algılara sahip oldukları ve yatırım sürecinde sosyal çevre ve medya ortamlarının da etkisinin büyük olduğu çalışma sonucunda elde edilen önemli bulgulardandır. Elde edilen veriler ışığında tüm eğitim kademelerinde finansal okuryazarlık ve lisans seviyesinde blok zincir eğitimlerinin verilmesine yönelik öneriler getirilmiştir.
Analysis of Maarif Model of Century of Türkiye Secondary School Mathematics Curriculum According to SOLO Taxonomy
(2024) Satmaz, İsmail; Yabanova, Ulaş
Curricula are regularly updated to keep pace with social developments and scientific advancements. In this context, a new curriculum called the Maarif Model of Century of Türkiye was introduced into the Turkish Education System in 2024. Taxonomic approaches are often employed in the development of curricula; however, the specific taxonomic approach used in this curriculam has not been disclosed. The aim of this study is to analyze the secondary school Mathematics Course outcomes of the Maarif Model of Century of Türkiye Educational Program using the SOLO taxonomy. The study utilized document analysis, a qualitative research method. The outcomes were analyzed according to the SOLO taxonomy using software developed by the researchers. The results of the analysis were then reported and discussed.
ÇANAKKALE ONSEKİZ MART ÜNİVERSİTESİ TERZİOĞLU YERLEŞKESİNE SÜNGER ŞEHİR KONSEPTİ UYGULANMA POTANSİYELİNİN ARAŞTIRILMASI
(2024) Kızılaslan, Mehmet Anıl
Çanakkale Onsekiz Mart Üniversitesi Terzioğlu Kampüsü'nde gerçekleştirilen bu çalışma, kampüs alanında Sünger Şehir konseptinin uygulanabilirliğini araştırmayı amaçlamaktadır. Çalışma kapsamında mevcut duruma yönelik saha araştırmaları yapılmış ve coğrafi bilgi sistemi ortamı kullanılarak sayısal veriler elde edilmiştir. Elde edilen bulgulara göre, mevcut durumda yapılacak değişiklikler ile yerleşkenin sünger şehir konseptine yaklaştırılması mümkündür. Bu değişiklikler arasında yeşil çatı uygulamaları, geçirimsiz yüzeylerin geçirgen hale getirilmesi ve mevcut yağmur suyu drenaj sisteminin iyileştirilmesi yer almaktadır. Ayrıca, kampüs içinde yağmur bahçeleri ve yağmur suyu biriktirme haznelerinin inşa edilmesi önerilmiştir. Bu uygulamaların hayata geçirilmesi, kampüsün su kaynaklarını daha verimli kullanmasını sağlayarak çevresel sürdürülebilirliği artıracaktır. Çalışma sonucunda, Sünger Şehir konseptinin kampüs içerisinde uygulanmasının mümkün olduğu ve belirlenen alanlarda yapılacak iyileştirmelerin bu süreci destekleyeceği tespit edilmiştir. Bu tür yeşil uygulamaların, kampüsün ekolojik ayak izini azaltacağı, yağmur suyunu etkili bir şekilde biriktireceği ve iklim değişikliği ile mücadelede önemli bir rol oynayacağı sonucuna varılmıştır.
Ultrasonically sprayed cobalt oxide thin films: Enhancing of some physical properties by nickel doping
(Elsevier B.V., 2021) Kuş, Esra; Küçükkarslan, Ayşe; Demirselçuk, Barbaros; Sarıca, Emrah; Akyüz, İdris; Bilgin, Vildan
In this study, the effect of Ni doping (3, 6, 9 at%) on structural, optical, electrical and magnetic properties of Co3O4 films was reported. Films were grown at 300 ± 5 °C substrate temperature via ultrasonic spray pyrolysis (USP) technique. The structural analyses showed that undoped and Ni (3%) doped films exhibit an amorphous structure. Ni doping at higher ratios caused the films to have improved crystallinity. Optical band gap values the films were found to be between 2.03 and 2.08 eV with an additional sub-band corresponding to energies varying between 1.35 and 1.46 eV. The electrical conductivity values of the films increased significantly depending on the Ni doping. The hysteresis curves of the films showed that the films have weak ferromagnetic properties. Ni doping significantly improved the structural and electrical properties of Co3O4 films making them suitable materials for technological applications.

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