Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Battal, Fetullah(10)
- Ayata, Ümit(8)
- Dertli, Enes(8)
- Kul, Murat(8)
- Kan, Muhammed Enes(7)
- Kaya, Yunus(7)
- Öztekin, Sebahat(7)
- Akeren, Zahide(6)
- Aydemir, Uğur(6)
- Bayraktar, Bülent(6)
- Korkmaz, Huseyin(6)
- Peker, Hüseyin(6)
- Aksakalli, Ayhan(5)
- Apak, Ömer Ceyhun(5)
- Banaz, Emrullah(5)
- Can, Zehra(5)
- Esmer, Yusuf(5)
- Hasar, Ugur Cem(5)
- Kutlu, Naciye(5)
- Sönmez Sari, Ebru(5)
- Sönmez Sarı, Ebru(5)
- Ulay, Göksel(5)
- Çolak, Murat(5)
- Ünlü, Hami(5)
- İspirli, Hümeyra(5)
- Aksan, Nurcan Demircan(4)
- Bayraktar, B.(4)
- Degirmenci, Yavuz(4)
- Doğan, Zeki(4)
- Ecem Bayram, Nesrin(4)
- Elmalı, Kübra(4)
- Iliev, Teodor(4)
- Kadakal, Mahir(4)
- Kalyoncuo, Servet(4)
- Semerci Çakmak, Vahide(4)
- Yayla, İbrahim Erdoğan(4)
- Zozik, Adalet(4)
- Öktem, Tuncay(4)
- Şenay, Volkan(4)
- Abdioglu, Murat(3)
Yayınlar
- MakaleAçık Erişim2025Scopus SJRQ3EffectofJackfruıtPulpExtractonSerumNesfatın-1andVısfatın Levels in Streptozotocın-induced Rats
Erkılıç, T. Orkun; Bayraktar, B.
Background: The aim of this study was to investigate the effects of different amounts of jackfruit pulp extract (JPE) in the diets on serum nesfatin-1 and visfatin levels in Streptozotocin (STZ)-induced Type 1 diabetic rats. Methods: In this study, 64 adult male Wistar albino rats, aged between 8-10 weeks, were used. 8 groups were created, with 8 rats in each group: Control (C), J100 (JPE 100 mg/kg group given with oral gavage route of administration (OGRA), J200 (JPE 200 mg/kg group given with OGRA), J300 (JPE 300 mg/kg group given with OGRA); STZ 55 mg/kg i.p administered group, DJ100 (D+100 mg/kg JPE), DJ200 (D + 200 mg/kg JPE), DJ300 (D). + 300 mg/kg JPE). The study lasted a total of 31 days, including adaptation (7 days), induction of diabetes (3 days) and trial period (21 days). Blood samples were taken from the tail vein (Vena caudalis) of all subjects on days 0 and 21 of the study. Nesfatin-1 and visfatin levels in the serum samples were measured by ELISA method. Result: As a result, in the diabetes groups of our study, the most significant increase in the mean serum nesfatin-1 level and the most significant decrease in the mean serum visfatin level occurred in the DJ200 groups at the end of the 21st day due to the addition of JPE (p<0.05). As a result, it was concluded that JPE may be safe and beneficial when administered at a dose of 200 mg/kg in diabetic groups.
AtıfScopus6OpenAlex1
İncele - MakaleYalnız künye2025Scopus SJRQ2Bee bread from Anatolia: its chemical composition, phenolic and aromatic profiles, and antioxidant properties
Kolayli, Sevgi; Okumus Yukunc, Gulsah; Kara, Yakup; Demir Kanbur, Esra; Can, Zehra; Ozkok, Aslı; Tanugur Samanci, Aslı Elif
This study investigated the botanical origin, chemical composition, phenolic and volatile aromatic profiles, and antioxidant activities of 11 bee bread samples from different regions of Anatolia, Turkey. The bee bread samples contained high amounts of proteins (19.61 g/100 g) and lipids (6.43 g/100 g). The bee breads were determined to have a rich mineral content. The antioxidant potential of the bee breads was predicted using total phenolic content (TPC), total flavonoid content (TFC), total condensed tannin (TCT) content, 2,2-diphenyl-1-picrylhydrazyl (DPPH), and ferric reducing antioxidant power (FRAP) assays. The TPC of the bee breads ranged between 2.041 ± 0.170 and 3.224 ± 0.006 mg GAE/g, while the TFC ranged from 0.323 ± 0.004 to 1.903 ± 0.017 mg QE/g. The FRAP assay showed antioxidant activity ranging from 17.778 ± 0.207 to 49.752 ± 0.856 µmol FeSO4.7H2O/g, and the DPPH values were between 1.054 ± 0.009 and 4.366 ± 0.014 SC50 mg/mL. Using 25 standards, RP-HPLC-PDA quantified the composition of the phenolic compounds, attributed to their antioxidant activity. The highest concentrations were detected for t-cinnamic acid, rutin, and p-coumaric acid. One hundred nineteen volatile aromatic compounds were determined in the bee breads by solid-phase microextraction coupled with gas chromatography and mass spectrometry (SPME-GC-MS). The obtained values suggest that bee breads could serve as a potential source of nutrients and bioactive compounds for value-added food supplements and functional foods.
AtıfScopus12WoS13OpenAlex15İncele - MakaleAçık Erişim2025Scopus SJRQ1RETRACTED: Algorithmic management and reflexive ethnography: methodological innovations for practice-theoretical observation
Tutar, Hasan; Battal, Fetullah
Purpose – This study aims to reveal the alternative methodological possibilities offered by reflexive ethnography in this field, where classical observation techniques are inadequate, by conducting a sociological analysis of algorithmic management systems that have become widespread on digital platforms. Design/methodology/approach – In the research conducted with reflexive ethnography, which is a qualitative method, the researcher’s own experience, position and impact on the observation process are placed at the center of data production. This approach offers a more flexible and multi-layered analysis framework in digital environments shaped by variables and algorithms that replace fixed observation areas. Findings – Algorithmic management constantly controls the workforce with opaque decision processes. This situation creates behavioral orientations that are difficult to capture with classical ethnography. Reflexive ethnography provides a more holistic observation by including the researcher’s intuitive, technical and experiential data in understanding these systems’ internal logic. Research limitations/implications – Reflexive ethnography offers a strong methodological basis that is flexible enough to not only understand today’s governance systems but also to analyze the digital institutions of the future. Originality/value – Regarding future ethnographic research, reflexive ethnography has the potential to address not only algorithmic systems but also the effects of these systems on users, performance evaluation methods and the construction of affect and self. The interdisciplinary collaborations of this method with informatics, media studies, sociology and anthropology will provide methodological depth and analytical diversity. Furthermore, combining with other approaches such as cyber-ethnography, shadow ethnography and autoethnography, it can open up new research paths to understand the multi-layered structure of digital platforms. Thus, reflexive ethnography offers a strong methodological basis that is flexible enough to not only understand today’s governance systems but also to analyze the digital institutions of the future.
AtıfScopus1WoS1OpenAlex1İncele - MakaleAçık Erişim2025Scopus SJRQ3A Systematic Review On Psychological Capital And Psychological Well-Being (1993-2023)
Battal, Fetullah
In the literature, many studies have been conducted on the terms of psychological capital and psychological well-being over the last thirty years. However, it has been observed that the interest in these concepts has increased today. Most of the studies have been obtained at the relational level or with quantitative methods. However, the number of studies in which the constructs of psychological capital and psychological wellbeing are examined systematically or qualitatively is quite limited. In this research, a systematic mapping was made for the relevant concepts using R and Rstudio programs together, with the help of data obtained from Wos. In this way, potential researchers will be capable of seeing the conditions of the relationship between psychological capital and psychological well-being in the last thirty years and will be able to have deeper and clearer information about the levels of related concepts. When we look at the most emphasised key concepts based on the analysis, it is sighted that keywords such as leadership, social capital, old age, hedonic wellbeing and good mood are at the forefront. When looking at niche areas of study, keywords such as climate change, adaptation, migration and innovation emerge. In other words, scientists doing research in the branches of administration and organisational or non-clinical psychology should look at graphs containing motor or basic concepts, if they want to do a deeper investigation and understand the subject in general. Based on these data, although the terms psychological capital and well-being are thought to be in the context of affirmative psychology, their relationship with the concepts that are popularly described as dark behaviours is also examined. By offering a systematic examination and guidance for the future, the data of the study adds something unique to the literature.
AtıfOpenAlex1
İncele - MakaleAçık Erişim2025Scopus SJRQ2Investigation of the Effect of Vanadium Addition on Mechanical Properties in A356 Aluminum Casting Alloys
Çeker, Merve; Çolak, Murat
The superior properties of aluminum alloys are further improved by the addition of different elements and gain new qualities. In the aluminum casting industry, vanadium (V) addition plays an important role to improve the mechanical and physical properties of these alloys. In this study, different amounts of V (0.03%, 0.06% and 0.1%) were added to A356 alloy, and its effects on mechanical properties and microstructure were investigated experimentally. The liquid metal degassing process was applied in all experiments in order not to affect the results of gases and inclusions in the liquid metal before casting. In the study, degassing was assessed by the Reduced Pressure Test (RPT). Tensile and hardness test specimens were performed with specimens obtained from mechanical test molds. When the results were examined, the elongation amount, which was 2.7% in A356 casting without addition, increased with the addition of V and reached a maximum value of 7.6% with 0.1% V addition. Tensile stress values were 137 MPa in A356 castings without addition, 159 MPa with 0.03% V addition, 168 MPa with 0.06% V addition and increased up to 185 MPa with 0.1% V addition.
AtıfScopus5WoS5OpenAlex5İncele - MakaleAçık Erişim2025Scopus SJRQ2A Promising Antibacterial Inhibition of Propolis Extracts Against Carbapenem-Resistant Bacteria Isolated From Clinical Samples
Esertaş, Ülkü Zeynep; Inal, Neşe; Can, Zehra; Kolaylı, Sevgi
The increasing inadequacy of antibiotics against multidrug-resistant pathogens is a growing concern. In this study, the antibacterial activity of propolis extracts with different phenolic profiles against carbapenem-resistant clinical isolates was investigated. The antimicrobial activity of propolis extract was tested against Acinetobacter baumannii (K17, K16, and K21), Klebsiella pneumoniae (K22, and K19), and Stenotrophomonas maltophilia (E5, E7, and E4) bacterial strains isolated from tracheal aspirate and blood cultures. The total phenolic content and phenolic composition of the extracts were analyzed. Antimicrobial activity values examined according to the disk diffusion method were measured as minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC). The results showed that all propolis extracts showed different inhibition values against bacterial strains. As a result, the high inhibitory potential of the propolis extracts against resistant bacteria such as A. baumannii, K. pneumoniae, and S. maltophilia is promising for combating infections. However, the study needs to be supported by further randomized clinical studies.
AtıfScopus2WoS2OpenAlex4
İncele - MakaleAçık Erişim2025Scopus SJRQ1Moderated Mediation in Problematic Digital Gaming Among Adolescents: Self-Esteem, Social Anxiety, Self-Concealment, and Sensation Seeking
Yayla, İbrahim Erdoğan; Makas, Samet; Koçak, Lokman; Yıldırım, Murat; Dombak, Kübra
Background: Problematic digital gaming among adolescents is a common behavioral issue that has negative consequences on school functioning and mental health. Theoretically, it is predicted that low self-esteem paves the way for problematic gaming by increasing social anxiety and self-concealment; this indirect pathway may be stronger in sensation seeking adolescents. Aims: The aim of this study is to examine the relationship between self-esteem and problematic digital gaming among adolescents, first through the PROCESS Model 6 in terms of social anxiety and self-concealment as mediators, and subsequently through Model 89 in terms of moderated mediation by sensation seeking. Method: The sample consisted of 448 Turkish adolescents (243 (54.2%) males, 205 (45.8%) females) aged between 13 and 18 years (M = 15.9). Participants completed the Game Addiction Scale for Adolescents—Short Form, Rosenberg Self-Esteem Scale, Self-Concealment Scale, Brief Sensation Seeking Scale and the Social Anxiety Scale-8. Results: A significant negative relationship was found between self-esteem and problematic digital gaming. Social anxiety and self-concealment fully mediated this relationship (indirect effects were significant). Sensation seeking conditioned the mediation by strengthening pathways to problematic digital gaming (moderated mediation was significant). The indirect effect was greater in those with high sensation seeking. Conclusions: The findings indicate that the negative effect, ranging from self-esteem to problematic digital gaming, progresses through social anxiety and self-concealment, and that this mediation is strengthened in adolescents with high sensation seeking. These results emphasize the need to integrate social anxiety reduction and self-expression skills into interventions in a target-sensitive manner, taking into account differences in sensation seeking.
AtıfScopus2WoS2OpenAlex3İncele - MakaleYalnız künye2025Scopus SJRQ4EFFECT OF ELECTROMAGNETIC FIELD DERIVED FROM ELECTRIC FENCE SYSTEM ON SPERM ACTIVITIES OF HONEYBEES (Apis mellifera L.); [Elektrikli Çit Sistemi Tarafından Oluşturulan Elektromanyetik Alanın Bal Arılarının (Apis mellifera L.) Sperm Aktivitesine Etkisi]
Erdoğan, Yaşar
This study investigated the effects of electromagnetic fields (EMFs) from electric fence systems on physiological and reproductive parameters of male honeybees (Apis mellifera caucasica). The study was conducted between May and August 2024 at the Bayburt University Beekeeping Application and Research Center, with five experimental groups. Hives were positioned at varying distances (1–2.5 m) from the fence. The findings showed that the average body weight (245.4 mg), sexual maturity rate (58.56%), and sperm concentration (0.87 ± 0.04 × 10 ⁶/μL) of drones closest to the electric fence were significantly reduced (p < 0.05). The electric field effect was limited in groups at greater distances, with statistically insignificant differences in some parameters. No significant differences were found between groups in sperm volume. Results demonstrate that electric fields from fence systems suppress developmental processes and reproductive physiology of drones in a distance-dependent manner. Lower body weight, decreased sperm concentration, and proportion of mature males in colonies near the fence show electromagnetic stress is a significant risk for bee health. Future studies should examine the effects of electromagnetic fields at different frequencies and strengths on larval development, sperm morphology, oxidative stress markers, and gene expression profiles.
- Derleme MakaleAçık Erişim2025Scopus SJRQ1Expanding Layers of Bacteriocin Applications: From Food Preservation to Human Health Interventions
Demirgül, Furkan; Kaya, Halil İbrahim; Ucar, Redife Aslıhan; Mitaf, Naciye Afranur; Şimşek, Ömer
Bacteriocins, ribosomally synthesized by bacteria, have long been recognized for their role in ensuring food safety and security due to their antibacterial effects against foodborne pathogens and spoilage bacteria. However, recent advancements have unveiled their expanding potential beyond food applications, with increasing evidence of their efficacy against clinically significant pathogenic bacteria, biofilm formation, viral infections, and even cancer. These emerging discoveries have continuously added new layers to the application of bacteriocins, extending their relevance from food preservation to broader human health interventions. To further harness this expanding potential, various innovative strategies have been developed to overcome traditional limitations associated with bacteriocin use. Instead of directly employing bacteriocins or bacteriocin-producing bacterial cultures, novel approaches, such as incorporating them into films and packaging materials or coupling them with nanoparticles, have demonstrated enhanced effectiveness. In this review, we examine the evolving landscape of bacteriocin applications and shed light on the expanding functional spectrum of bacteriocins for both food safety and human health, although some important challenges and limitations remain. By analyzing the recent literature and innovative technological advancements, we highlight how bacteriocins are continuously evolving, opening new frontiers for their use and reinforcing their significance beyond their conventional roles.
AtıfScopus22WoS21OpenAlex22İncele - Derleme MakaleAçık Erişim2025Scopus SJRQ1Factors affecting the sustainability of open educational resource initiatives in higher education: A systematic review
Aksoy, Dilara Arzugül; Kurşun, Engin; Zawacki-Richter, Olaf
This systematic review aims to examine the factors that impact the sustainability of open educational resources (OER) initiatives. A total of 226 articles from the Web of Science, ERIC and SCOPUS databases were subjected to content analysis to identify factors that influence the sustainability of OER initiatives based on the 3M (macro, meso and micro) framework. Our findings reveal that OER sustainability is influenced by different factors in different contexts, such as platform, content creator, learner, learning material and institutional setting. Within the institutional context, institutional policies categorised as a macro and meso factor, were identified as the most frequently mentioned factor affecting OER sustainability. The factors of providing institutional support and incentives were identified as meso factors. For faculty and learners, meso and micro factors such as attitude, motivation, awareness of OER, time, ICT needs and digital literacy were frequently mentioned. Access emerged as a prominent meso factor within the OER platforms dimension. Quality was identified as a critical macro and meso factor for the sustainability of OER. After the quality factor, material-related factors such as licensing, interactivity and free access emerged. Finally, an OER sustainability framework is proposed along with recommendations for researchers, practitioners and administrators to promote sustainable OER practices.
AtıfScopus4WoS4OpenAlex9İncele - MakaleAçık Erişim2025Scopus SJRQ1The Effects of Essential Oils from Coriander Seed, Tarragon and Orange Peel on Lipid Production by Yarrowia lipolytica Strains
Yılmaz, Özlem; Kaban, Güzin; Kaya, Mükerrem
The aim of the study was to investigate the effects of different concentrations (0.15, 0.30, and 0.45 mL/L) of essential oils from coriander seeds (Coriandrum sativum), tarragon (Artemisia dracunculus), and orange peels (Citrus sinensis) on biomass, lipid content, and lipid yield of the strains Yarrowia lipolytica Y-1094, Y. lipolytica YB 423, and Y. lipolytica IFP29. The fatty acid composition of the oils produced by the strains was also determined. The highest biomass (5.38 ± 1.80 g/L) and lipid production (0.98 ± 0.42 g/L) were observed in the presence of Y. lipolytica IFP29 and Y. lipolytica YB 423, respectively. The lipid yield showed the highest value at the level of 0.45 mL/L in the presence of the Y. lipolytica Y-1094 strain. The correlation heat map results indicate that 0.45 mL of tarragon affected biomass and lipid content more than the other essential oils used. Y. lipolytica Y-1094 produced higher levels in terms of myristic acid and palmitic acid in all three essential oil sources than the other strains. The highest oleic acid level of all strains was determined in coriander seed essential oil, and the lowest in tarragon essential oil. The oleic acid level of Y. lipolytica Y-1094 was lower than that of the other two strains in all essential oils. Regarding linoleic acid, the oil level did not have a significant effect in the presence of tarragon and orange peel.
AtıfScopus1WoS1OpenAlex1İncele - MakaleAçık Erişim2025Scopus SJRQ1The impact of the Dark Triad personalities and parental interaction patterns in predicting the tendency toward risky behaviors among adolescent girls in Ardabil, Iran in 2024
Motavalli, Roya; Shayeghi, Hanieh; Mousazadeh, Tavakkol; Apay, Serap Ejder; Aktaş, Elif Odabaşı
Background: The escalating prevalence of risky behaviors during adolescence has emerged as a grave threat to public health, posing one of the most significant psychological, social, and health-related challenges globally. These behaviors impact the individual and have negative consequences on families and society. As a pressing concern for communities, healthcare organizations, and social policymakers, identifying factors leading adolescents toward risky behaviors is paramount and urgent. Methods: This descriptive correlational study was conducted in Ardabil, Iran, in 2024. Using convenience sampling, 200 s-year high school girls with an average age of 17 were selected. Participants were asked to complete three questionnaires: the Dark Triad Personality Test, the Revised Family Communication Patterns Scale (RFCP), and the Questionnaire of Risky Behaviors (QRB). The data were analyzed using Pearson correlation and multiple regression analysis, utilizing SPSS version 20. Results: The findings revealed a significant positive correlation (p < 0.01) between machiavellianism, narcissism, psychopathy, and the conformity interaction pattern with a tendency toward risky behaviors in adolescents. Additionally, there was a significant negative correlation (p < 0.01) between the conversation interaction pattern and risky behaviors. The results further indicated that 30.4% (p < 0.01) of the variance in risky behavior tendencies in adolescent girls could be explained by the Dark Triad personality traits. In comparison, the interaction patterns of conversation and parental conformity could account for 37% (p < 0.01). Conclusions: This study suggests that the Dark Triad personality traits and parental interaction patterns can effectively predict adolescent girls’ tendencies toward risky behaviors. These results underscore the need for effective management strategies addressing these variables in school programs to provide early interventions that may prevent the escalation of risky behaviors among adolescents.
AtıfScopus1WoS3OpenAlex4İncele - MakaleAçık Erişim2025Scopus SJRQ2Biosynthesis of Functionalized Silver Nanomaterials Utilizing Seeds of Black Rosehip (Rosa pimpinellifolia L.) and its Remarkable Antioxidative Capacity
Kizil, Hamit Emre
Background: Silver nanoparticles (AgNPs) have gained significant attention due to their unique antimicrobial, catalytic and optical properties. This study focuses on the green synthesis of silver nanoparticles using black rosehip (Rosa pimpinellifolia L.) seeds (Rp-AgNPs) and evaluates their biological activities. Methods: Rp-AgNPs were synthesized using R. pimpinellifolia seed extract and characterized using multiple analytical techniques including UV-Vis spectroscopy, XRD, FTIR, TEM, SEM, EDAX, zeta potential analysis, DSC, SERS and XPS. The biological activities were assessed through DPPH free radical scavenging assay, cytotoxicity testing against H460 lung cancer cells and antimicrobial activity evaluation against various pathogens. Result: The synthesized Rp-AgNPs exhibited spherical morphology with an average size of 51.27 nm and demonstrated stability with a zeta potential of-18.9. The nanoparticles showed enhanced antioxidant activity (IC50 = 30.89 μg/mL) compared to the seed extract (IC50 = 136.4 μg/mL). Cytotoxicity studies revealed significant effects against H460 cells with an IC50 of 65.8 μg/mL. Antimicrobial testing demonstrated effectiveness against both Gram-positive and Gram-negative bacteria (MIC 50-100 μg/mL) and Candida strains (MIC 100-200 μg/mL).
AtıfScopus1WoS1OpenAlex1İncele - MakaleAçık Erişim2025Scopus SJRQ3The Effect of Cannabidiol on Myokine, Cerebral and Cardiac Response in Rats with Sepsis Induced by Cecal Ligation and Punture Method
Erkiliç, T. Orkun; Bayraktar, B.
Background: The aim of this study was to investigate the effects of Cannabidiol on myokine (Irisin), cerebral (BDNF) and cardiac (cTnI) responses in sepsis-induced rats by Cecal Ligation Perforation (CLP) method. Methods: In this study, 40 adult male Wistar albino rats, aged between 8-10 weeks, were used. 5 groups were created, with 8 rats in each group: Control (C), Sham (S), CLP, CLP+CBD 2.5 mg/kg, CLP+CBD 5 mg/kg group. Rats in groups C and Sham were sacrificed at the end of the 10th hour and intracardiac blood was taken immediately afterwards. In groups CLP, CLP+2.5 mg/kg, CLP+5 mg/kg, intra-abdominal sepsis was induced and at the end of the 10th hour after sepsis occurred with CLP application, rats were sacrificed and intracardiac blood was taken immediately afterwards. İrisin, BDNF and cTnI levels in the serum samples were measured by ELISA method. Result: In the present study, mean serum irisin, BDNF and levels were determined to be at the lowest level in the CLP group, while cTnI levels were at the highest level (p<0.01). In CLP groups, serum irisin and BDNF levels increased due to CBD addition and the most significant decrease in cTnI levels occurred in 5 mg/kg CBD groups. As a result, it was concluded that CLP may be safe and beneficial when administered at a dose of 5 mg/kg in sepsis-induced rats.
AtıfScopus2WoS2İncele - MakaleAçık Erişim2025Scopus SJRQ1Sensitive and selective nitrite sensor based on CuCo2O4-rGO nanocomposite synthesized by one-pot electrochemical method in pastırma
Anlar Daldal, Pınar; Öztürk Doğan, Hülya; Cinar Topcu, Kübra
In this study, CuCo₂O₄-rGO nanostructures were synthesized by a one-pot electrochemical method on the surface of Pencil Graphite Electrode (PGE) for nitrite determination in pastırma, a traditional meat product. The developed modified electrode was used to determine the amount of nitrite in pastırma samples obtained from three different brands in the Turkish market. When the nitrite values obtained by the electrochemical method were compared with the spectrophotometric method, they showed 91.20 % to 100 % agreement. In addition, the physicochemical properties of pastırma samples, such as pH, moisture, protein, fat, and ash, were analysed, and it was determined that pH and moisture values are critical parameters for product quality. These results show that the developed electrode provides a practical and sensitive method for nitrite sensing.
AtıfScopus2WoS2OpenAlex2İncele - MakaleAçık Erişim2025Scopus SJRQ1Electrospinning Encapsulation of Chlorophylls Microwave-Extracted from Spinach Waste and Utilization as Coloring Agent in Yogurt
Isik, Beyza Sukran; Bayram, Sinan; Altay, Filiz
Natural colorants have become a developing market because of consumer preferences, and more cost-effective and stable production is necessary. In the present study, a natural green colorant was obtained via microwave-assisted extraction from spinach waste to produce affordable, environmentally-friendly, and innovative colorants. The extracts were encapsulated with zein via uniaxial and coaxial electrospinning techniques to overcome the stability issues associated with their natural green color. The encapsulation efficiencies of uniaxially encapsulated chlorophyll extracted from spinach waste by microwave were 63.50 and 57.18 for chlorophyll a and b, respectively. The efficiencies of chlorophyll a and b by coaxial electrospinning were found 49.53% and 88.58%, respectively. The microwave-assisted extraction and the addition of eumelanin may contribute positively to the antioxidant activity and thermal stability of electrospun samples. The stability test against light revealed that 61% of chlorophyll a could be preserved by uniaxial electrospinning. In addition, when chlorophyll-loaded nanofibers were incorporated into yogurt, a more stable green color was achieved during storage.
AtıfScopus10WoS9OpenAlex11İncele - MakaleAçık Erişim2025Scopus SJRQ3Effects of Formaldehyde Scavenger on Mechanical, Physical, and Emission Test Results in Multi-Layer Pressed Chipboard Production
Çamlibel, Osman; Peker, Hüseyin; Ayata, Ümit; Ulay, Göksel
This study investigates the effects of different formaldehyde scavenger (FS) ratios on the physical, mechanical, and chemical properties of fiberboard composites. Experimental analyses included measurements of thickness, density, modulus of rupture (MOR), modulus of elasticity (MOE), internal bond strength (IB), shear strength (SS), moisture content, thickness swelling (TS), water absorption (WA), and formaldehyde emission (FE) levels. The results indicate that an increase in the FS ratio leads to a significant decline in mechanical properties. Specifically, MOR, MOE, and IB values decreased by 17.97%, 15.65%, and 16.33%, respectively. Changes in TS and WA were also observed, with TS increasing by up to 22.68% and WA decreasing by as much as 16.90%. In terms of formaldehyde emissions, a significant reduction was observed as the FS ratio increased. At a 15% FS ratio, formaldehyde emissions decreased by 43.24%, which is considered a positive outcome in terms of environmental and health impacts. Overall, the use of FS in specific ratios reduces FE while causing certain reductions in mechanical properties. These findings highlight the importance of optimizing FS usage for the production of low-FE fiberboards.
AtıfScopus3WoS2OpenAlex1İncele - MakaleAçık Erişim2025Scopus SJRQ1Experimental performance assessment of two-stage thermoelectric system in a closed-cycle drying process
Osta, Muhammet Harun; Yakut, Kenan; Köksal, Hüseyin
Traditional drying systems suffer from several limitations, including high energy consumption, insufficient hygienic control, and the inability to maintain precise temperature regulation. Although alternative drying systems have been developed to address these issues, they often encounter practical challenges due to their complex structures and the need for numerous external components. To overcome these limitations, this study proposes and experimentally evaluates a novel, independently operating, two-stage thermoelectric module (TEM) system integrated into a closed-loop drying setup that eliminates the need for external heating and dehumidification components. The proposed system addresses the efficiency and hygiene problems observed in conventional dryers by simultaneously performing air heating, cooling, and dehumidification functions through compact thermoelectric devices. The drying process consists of two stages: the first involves air pre-conditioning (heating/cooling), while the second is dedicated to dehumidification. The performance of the system has been evaluated based on key metrics such as cooling and heating capacities, the coefficients of performance (COP) for both stages, moisture removal rate (MRR), and moisture removal rate effectiveness (EffMRR). Experimental studies were conducted under input voltages ranging from 3 to 7 V, relative humidity levels between 60 % and 90 %, and varying airflow rates. Under 90 % relative humidity conditions and a 7 V input voltage, the system achieved a maximum moisture removal rate of 13.1 g/h. The first-stage TEM reached a heating capacity of 68.81 W and a cooling capacity of 26.34 W, while the second stage provided 21.17 W of cooling capacity.
AtıfScopus5WoS5OpenAlex5İncele - Kitap BölümüYalnız künye2025Electrosprayed particles for improved delivery of carotenoids, vitamins, and minerals
Öztekin, Sebahat; Najafi, Zahra; Cetinkaya, Turgay; Ayseli, Mehmet Turan; Aslan, Ismail; Göksen, Gülden; Delshadian, Zohre
Carotenoids, vitamins, and minerals have vital roles for living organisms, yet they often remain underutilized due to their poor solubility, limited stability, and low bioavailability. Thanks to electrospraying technology, innovative solutions are available to overcome these challenges compared to conventional delivery systems. Therefore, this book chapter provides comprehensive information on the principles, mechanisms, electrospraying techniques, effective parameters on particle formation and properties, regulatory aspects, and in vitro/in vivo particle delivery systems of electrosprayed carotenoids, vitamins, and minerals. The chapter is structured into five main sections. The first section gives a brief introduction to electrospraying technology and electrosprayed particles. In the second section, the focus shifts to the fundamentals of electrospray technology and detailing their underlying principles, types, and parameters. The third section delves into the specific uses of electrospraying for xbiotics, phenolic and nonphenolic compounds, with particular emphasis on the applications of electrospraying for the encapsulation of carotenoids and minerals, carotenoids, and taste-related compounds. This section also related to the impact of electrospraying on seafood quality as a good example. The fourth section provides an in-depth analysis of the stability, absorption, and bioavailability improvements of electrosprayed particle delivery systems through in vitro and in vivo studies. The final section addresses regulatory considerations, safety, and future perspectives. It reviews the current regulatory landscape for food additives and dietary supplements, emphasizing the compliance requirements for novel electrosprayed delivery systems. Through detailed scientific insights and practical applications, this chapter paves the way for innovative approaches to electrosprayed particles for improved delivery of carotenoids, vitamins, and minerals.
- MakaleAçık Erişim2025Scopus SJRQ3A review and classification of conventional, advanced, smart and multifunctional glazing technologies for low-carbon building applications
Cuce, Pinar Mert; Guclu, Tamer; Cuce, Erdem
In this study, various smart window technologies are introduced, examined in terms of energy efficiency, and their advantages over existing conventional windows are presented. Smart window technologies used today are more energy efficient than traditional single and double-glazing windows. It is possible to achieve up to 80% energy savings in building heating/cooling costs compared to traditional window technologies, with a correctly selected and applied smart window technology depending on various external factors such as building facade, climatic conditions and window area. Therefore, smart windows technologies play a leading role in the realisation of nearly/zero energy building goals.
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