Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Bayraktar, Bülent(11)
- Kadakal, Mahir(10)
- Kutlu, Naciye(10)
- Can, Zehra(8)
- Dertli, Enes(8)
- Kırbaş, Zila Özlem(8)
- Teber, Ahmet(8)
- Ayata, Ümit(7)
- Durmuş, İbrahim(7)
- Kadakal, Huriye(7)
- Kirbaş, Zila Özlem(7)
- Özdemir, Akın(7)
- Apak, Ömer Ceyhun(6)
- Banaz, Emrullah(6)
- Bayram, Nesrin Ecem(6)
- Bayram, Sinan(6)
- Demir, Mustafa(6)
- Esmer, Yusuf(6)
- Gercek, Yusuf Can(6)
- Akeren, Zahide(5)
- Battal, Fetullah(5)
- Ekincioğlu, Yavuz(5)
- Ergün, Mustafa(5)
- Gıdık, Betül(5)
- Kara, Yakup(5)
- Maden, Sedat(5)
- Şahin, Engin(5)
- Akeren, İhsan(4)
- Aras, Zakir(4)
- Ayazoglu, Rabil(4)
- Cengiz, Ekrem(4)
- Cuce, Erdem(4)
- Cuce, Pinar Mert(4)
- Ecem Bayram, Nesrin(4)
- Erkılıç, Tugçe Orkun(4)
- Filiz, Tunahan(4)
- Kamiloğlu, Aybike(4)
- Karaali, Rabi(4)
- Kırkıncı, Seran(4)
- Semerci, Vahide(4)
Yayınlar
- MakaleAçık Erişim2024Scopus SJRQ2Optimization of a Novel–Enriched Pasta Production and Its Physical, Chemical, and Characteristic Properties
Yilmaz, Merve Silanur; Kutlu, Naciye; Sakiyan, Ozge; Isci, Asli
The aim of the study is to enrich pasta with cornelian cherry powder, a product with high bioactive contents. In this way, it was aimed to obtain a new product that is more nutritionally advanced and can contribute to the country’s economy. In this study, cornelian cherry with high bioactive content and an attractive color advantage was used for the enrichment of the pasta formulation. In addition, the pasta production procedure was revised by applying microwave technology for drying. Cornelian cherry powder:dough ratio, dough thickness, and microwave power were optimized with response surface methodology. Total phenolic content, antioxidant activity, color, and water-holding capacity were determined as responses. Optimum conditions were found as 4.53% for powder:dough ratio, 0.1 cm for dough thickness, and 270 W for microwave power. According to optimization results, it was detected that the cornelian cherry powder:dough ratio affected the total phenolic content and antioxidant activity, and microwave power was found to be effective only on antioxidant activity. For optimum conditions, the total phenolic content and antioxidant activity were found as 1.29 GAE/g and 0.5 mg TE/g, respectively. The characterization analysis showed that the microwave–dried sample shrank less than those dried with the conventional method. In Fourier transform infrared spectroscopy (FTIR) results, it was determined that the amount of carbohydrates in the samples obtained under optimum conditions was lower than that of control. It has been observed that the application of microwave technology for drying pasta enriched with cornelian cherry powder had positive effects on the quality of the final product.
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İncele - MakaleAçık Erişim2024Scopus SJRQ1A case study comparing seismic retrofitting techniques for a historically significant masonry building's minaret
Kiral, Adnan; Ergün, Mustafa; Tonyali, Zeliha; Artar, Musa; Şentürk, İdris
Historical masonry structures are extremely susceptible to earthquakes due to their characteristic features. Seismic performance and corresponding damage patterns vary between these buildings. Even though the main structure was undamaged, many minarets suffered damage or collapsed due to the transmission of large forces from the main mass to the minaret and the abrupt changes in cross-section due to the geometry of the minaret. This study uses an ancient masonry mosque as a case study, whose minaret and main building are constructed as a single structure. The mosque's minaret under seismic excitation is the focus of this study. The adopted model is called Alaeddin Bey Mosque in Muş, Türkiye. The seismic performance assessment of the minaret, considering various retrofitting options, is mainly based on four critical parameters: base shear, acceleration, displacement, and maximum tensile forces in all three dimensions. The analyzed retrofitting methods include base isolation located in the basement of the mosque, viscous dampers placed only in the upper part of the minaret, Carbon Fiber-Reinforced Polymer fabric fitted to only the minaret, and steel plates applied to only the minaret. Representative structural models of the mosque have been modelled with SAP2000 software. The main novelty of this study is the use of viscous dampers in the minaret. It is the first time a design methodology has been introduced for viscous damper applications in minarets. This methodology aims to prevent local damage to the minaret due to the forces generated by the dampers, while also considering the constraints of limited internal space within the minaret. The finding of this study shows that viscous damper application yields significantly better results compared to the application of Carbon Fiber-Reinforced Polymer fabric and steel plates. However, although base isolation reduces the tensile stress values throughout the entire mosque to levels well below the material's strength, viscous damper application in the minaret significantly reduces tensile stresses only in the minaret. As a result, viscous dampers are recommended for damage reduction in the minaret only. Otherwise, base isolation should be considered for reducing stress values throughout the entire mosque including the minaret. This study contributes towards the development of new seismic retrofitting methods for historic masonry buildings ‘minaret.
AtıfScopus26WoS26OpenAlex24İncele - MakaleYalnız künye2024A Comparative Study on the Bioactivity and Mineral Content of Different Grapevine (Vitis vinifera L.) Leaves Cultivated in Türkiye
Yildiz, Hilal; Cakir, Ozlem; Cakiroglu, Kubra; Karatas, Neva
The mineral composition, total phenolic content, radical scavenging, and antibacterial activity of 17 Vitis vinifera L. leaves obtained from vineyards in northeast Türkiye were investigated in this study. The antibacterial activities of grapevine leaf extracts were investigated by the disk diffusion method against five bacterial strains, and all leaf extracts showed inhibitory activity on both Bacillus cereus and Staphylococcus aureus. The radical scavenging activity of grapevine leaf extracts was evaluated using the DPPH (2,2-diphenyl-1-picryl hydrazyl) and ABTS (2,2-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid) assays. The ‘Gineş’ cultivar had the highest level of radical scavenging activity, while the ‘Ciklap’ cultivar had the lowest. The total phenolic content of leaf extracts was in the range of 172.66–483.33 µg GAE/mg DW. Grapevine leaf extracts were examined in terms of 15 different elements. The most abundant element in varieties of grapevine leaves was potassium, and its concentration varied between 5208.83 and 13,586.49 mg/kg. The results indicated that V. vinifera L. leaves had strong antioxidant and antibacterial activity, and the varieties of grapevine had a significant impact on these parameters (p < 0.001). Mineral and trace element contents were also significantly affected by cultivars (p < 0.05).
AtıfScopus6WoS5OpenAlex6İncele - MakaleYalnız künye2024Scopus SJRQ2The effect of loneliness on fear of aging: Mediated by social support
Akeren, Zahide; Akeren, Ihsan
The study aimed to examine the relationships between loneliness, perceived support and fear of old age, to determine how they differ according to some socio-demographic variables and of loneliness to reveal the mediating role of perceived social support in the effect on fear of old age. In the descriptive cross-sectional study conducted between November 2023 and January 2024, the Loneliness Orientation Scale (LOS), Multidimensional Perceived Social Support Scale (MSPSS) and Fear of Old Age Scale (FOS) were used. Correlational analysis was used in the analysis of data collected from 611 participants aged 18–65 with two-stage sampling, T-test and ANOVA were used in the comparison of means, and the Hayes’ PROCESS macro was used to determine the mediating role of perceived social support. Women, singles, young people, those with low education and income fear old age more. There is a positive correlation between loneliness and fear of aging, and a negative correlation between these two and perceived social support. As a result, perceived social support is a partial mediator in the effect of loneliness on fear of old age and it should be considered as an effective source in reducing fear of old age.
AtıfScopus1WoS1OpenAlex2İncele - MakaleAçık Erişim2024Scopus SJRQ1Simpler Reference-Plane-Invariant Method for Permittivity Extraction of Medium- or Low-Loss Dielectric Samples Using One-Port Measurements
Cem Hasar, Ugur; Ali, Husain; Kaya, Yunus; Stoyanov, Ivaylo
A microwave method is devised to extract relative complex permittivity (ϵr) of medium- or low-loss dielectric samples. It is simpler, non-iterative, reference-plane-invariant (RPI), and applicable for one-port waveguide measurements with short-circuit termination only. Besides, since it uses short-circuit termination reflection-only measurements, it is free from Fabry-Pérot resonances. Permittivity measurements of polyvinyl chloride (PVC) and polypropylene (PP) are performed at X-band (8.2-12.4 GHz) to examine the performance of the proposed method considering different scenarios involving inaccurate information of sample location in the cell and inaccurate knowledge of the sample thickness. Repeatability analysis is carried out to analyze the performance of the proposed method against other similar methods in the literature.
AtıfScopus6WoS5İncele - MakaleAçık Erişim2024Scopus SJRQ3The Effect of Computer-Supported Stem Applications on Secondary Students' Achievement and Computational Thinking Skills
Berk, Gizem; Gülcü, Aslan
In this study, the effect of STEM applications integrated with computer-supported materials on mathematics achievement in the subject of ratio-proportion and percentages was examined. In addition, it was aimed to reveal the effect of these applications on computational thinking skills. Furthermore, we aimed to reach the opinions of the experimental group students about the materials they used, STEM applications, and the application process. A mixed method was used with a sample consisting of 89 students in grade 7 of a secondary school. An achievement test, a scale of levels of computational thinking, and learning diaries were used as tools for data collection. The data were analyzed using t-test and content analysis. It was found that there was a significant difference between the experimental and control groups in terms of achievement in favor of the experimental groups. In terms of computational thinking, there was a significant difference in favor of the experimental groups, except for the creativity aspect of computational thinking skills. Based on the findings obtained with the computational thinking skills scale the study had a positive impact on most aspects of computational thinking. Accessed through the learning diaries students' views on learning with STEM applications were generally positive. In particular, the opinions on computer-supported materials pointed to a very satisfactory process. The findings suggest that the inclusion of STEM activities and the use of computer technology in education contribute to students' computational thinking skills and learning.
AtıfScopus2OpenAlex3İncele - MakaleAçık Erişim2024Scopus SJRQ3Examining the Earthquake Awareness Levels of Teacher Candidates in Terms of Various Variables; [Öǧretmen Adaylarinin Deprem Farkindalik Düzeylerinin Çeşitli Deǧişkenler Açisindan Incelenmesi]
Degirmenci, Yavuz; Altunay, Furkan
Earthquakes are one of the most important and destructive natural disasters that frequently occur both in the world and in Türkiye, affecting living things and the environment, especially humans, in various aspects. It is a fact that despite today's technological possibilities and knowledge, the desired level has not yet been reached in preventing and predicting earthquakes. However, as with other disasters, individuals' preparedness and awareness for earthquakes is effective in reducing the damage of earthquakes. The aim of this research is to examine the earthquake awareness levels of university students in terms of various variables. The research was conducted based on a quantitative approach. "Earthquake Awareness Scale" was used as a data collection tool in the research. Jamowi statistical program was used to analyze the data. The study group of the research consists of undergraduate students studying at the faculty of education of a state university in Türkiye in the 2022-2023 academic year. According to the findings of the research; It was determined that the earthquake awareness levels of the participants were generally high, and while there was no significant difference in terms of gender and grade point average, there was a difference according to the department variable. In addition, according to the participants, it is vital to be aware of earthquakes, but they stated that university education is not sufficient to be prepared for earthquakes.
AtıfScopus3OpenAlex7TR Dizin5
İncele - MakaleYayıncıda açık erişim2024Scopus SJRQ1Investigation of Post-Transplant Mental Well-Being in Liver Transplant Recipients with Hepatic Encephalopathy
Saritaş, Serdar; Tarlaci, Sultan; Bulbuloglu, Semra; Guneş, Hüseyin
Objective: In this study, we aimed to examine the healing trend of hepatic encephalopathy after transplantation surgery in patients with liver failure. Method: We conducted this descriptive and cross-sectional study with the participation of liver transplant recipients. A personal information form, the West Haven Criteria (WHC), the Warwick-Edinburgh Mental Well-Being Scale (WEMWBS), and the Richmond Agitation Sedation Scale (RASS) were used for data collection. The data were analyzed using Chi-squared tests, ANOVA, and paired-samples t-tests. Results: As time progressed after liver transplantation, hepatic encephalopathy stages regressed (p < 0.01). We found that liver transplant recipients with end-stage hepatic encephalopathy were mostly within the first 6 months after transplantation, while patients with first-stage hepatic encephalopathy had received liver transplants more than 2 years ago (p < 0.01). Conclusions: The results of our study revealed that hepatic encephalopathy stages regressed after transplantation, but there was no complete recovery. This highlights the need to develop new treatment strategies other than liver transplantation for the treatment of hepatic encephalopathy.
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İncele - MakaleYalnız künye2024Scopus SJRQ1Intelligent detection of airport pavement subtle crack based on one-stage anchor-free deep neural network
Yuan, Bo; Tapkın, Serkan; Pei, Lili; Tercan, Emre; Zhao, Kaiyue; Li, Wei
To solve issues with low-detection accuracy and high-missed detection rate in subtle pavement cracks, this research proposed an intelligent detection method based on a one-stage anchor-free deep neural network, which consists of a feature extraction network, detection neck, and detection head. The feature extraction network with an extended deep attention network is responsible for extracting the features and output at different scales. The detection neck containing the special spatial pyramid structure fuses the contextual information of different scales to improve the abstract features. The detection head is composed of the anchor-free mechanism with decoupling property and the reparameterized structure to improve the detection accuracy and balance the algorithm complexity. The experimental results demonstrate that the Precision, Recall, and F1-Score are, 92.74%, 91.92%, and 0.9233 respectively. It has advantages over the most advanced one-stage detection method. Based on testing results, it has prominent stability and robustness for subtle pavement crack detection.
AtıfScopus1WoS1OpenAlex2İncele - MakaleAçık Erişim2024Scopus SJRQ1Classification of Student Leadership Profiles in Diverse Governance Settings: Insights from Pisa 2022
Görgülü, Deniz; Coşkun, Fatma; Sipahioğlu, Mete; Demir, Mustafa
Student leadership prepares students for responsibilities, such as taking on specific tasks and assuming leadership roles in their future personal and professional lives. Developing students’ leadership profiles is among the important goals of educational systems aiming for future generations to take responsibility and advance their countries. With this perspective in mind, the PISA assessment includes items to measure students’ leadership behaviors. This study aims to extract student leadership profiles from the leadership-related items in the PISA 2022 application, using data from Cambodia, Peru, Paraguay, and Guatemala, which have different governance systems and cultural characteristics. The second purpose of the research is to determine the distribution of the identified leadership profiles in these countries and explain them in the context of governance and cultural characteristics. Latent class analysis was used to determine student leadership profiles. Accordingly, two-class and three-class latent models were found to be the most suitable models to explain student profiles. While the distinction between student profiles is more pronounced in the two-class model, the three-class model provides more detailed information about student profiles. In this respect, two-class and three-class latent models are reported comparatively. In the two-class latent model, students are labeled as the “Shy or Lack of Self-Confidence Group” and the “Active Leader or Influential Group”. In the three-class latent model, students are labeled as the “Moderate or Passive Leader Group”, the “Strong Leader or Influential Group”, and the “Avoidant or Leadership-Uncomfortable Group”. In both models, it is one of the striking findings that Cambodian students are in the low leadership profile, and Peruvian students are in the high leadership profile.
AtıfScopus2WoS1OpenAlex1İncele - MakaleYalnız künye2024Scopus SJRQ2Do the natural and herbal remedies used for fighting against COVID-19 pose a risk for surgical patients?
Özkan, Meral; Güneş, Hüseyin
Introduction: To determine what natural and herbal remedies were used in the fight against COVID-19 and analyze the potential of these products to create a risk for surgical patients. Methods: The study was conducted with a descriptive and cross-sectional research design. The data were collected between September and October 2021. In the study, convenience sampling, which is a non-probability sampling method, was used. An online questionnaire was applied to the participants on social media platforms. In the data collection process, 1 488 individuals were reached. Results: The most frequently used herbal remedies by the participants were garlic (62.8%), ginger (53.4%), linden (42.3%), turmeric (37.9%), and oregano (35.6%). The most frequently used natural remedies were lemon (65.4%), honey (53.8%), yogurt (47.2%), traditional soups (33.5%), and vinegar (33.1%). The most frequently used supplements of vitamins were vitamin D (42.4%) vitamin C (41.1%), vitamin B12 (22.4%), vitamin E (8.7%), and fish oil/Omega-3 fatty acids (7.5%). Among the participants who reported that they used natural and herbal remedies (n = 710), only 6.9% were determined to have undergone a surgery in this period. Furthermore, 89.8% of these individuals who presented to the hospital for a surgery had not been asked whether they used natural or herbal remedies by healthcare professionals. Conclusion: The intake of garlic and vitamin E supplements according to the American Society of Anesthesiologists and the intake of garlic, ginger, turmeric/curcumin, and vitamin E supplements according to the Society for Perioperative Assessment and Quality Improvement Consensus Statement should be stopped before a surgery.
AtıfScopus2WoS2OpenAlex2İncele - MakaleYayıncıda açık erişim2024Scopus SJRQ1Can Enzymatic Modified Pectin in Mediterranean Fruits Be Therapeutic Against Stomach Cancer?
Üstün, Selime; Kizil, Hamit Emre; Dertli, Enes
The aim of this study was to evaluate the cytotoxic effects of enzymatically modified pectin products derived from grapefruit, jujube, and kumquat on the MKN-45 gastric cancer cell line in vitro. FTIR analysis revealed that the spectra of the pectins produced were comparable to those of commercial pectin and included the characteristic peaks identified in the literature. The galacturonic acid content was measured as 612 mg/g in grapefruit pectin, 544 mg/g in jujube pectin, and 704 mg/g in kumquat pectin. DSC analysis indicated that all pectin samples and their modifications exhibited one endothermic peak and one exothermic peak. Cytotoxicity assessments revealed that the enzymatically modified grapefruit pectin demonstrated significant cytotoxic effects across all tested concentrations, with 0.075 mg/mL being the most effective. For kumquat pectin, all tested concentrations showed cytotoxic properties, with 0.3, 0.15, and 0.075 mg/mL being the most effective. In the case of jujube pectin, cytotoxic effects were observed at all concentrations except for 1.2 mg/mL.
AtıfScopus3WoS3OpenAlex3İncele - MakaleAçık Erişim2024Scopus SJRQ2Green synthesis of (S)-1-(furan-2-yl)propan-1-ol from asymmetric bioreduction of 1-(furan-2-yl)propan-1-one using whole-cell of Lactobacillus paracasei BD101
Bülbül, Ali Savaş; Şahin, Engin
Chiral heterocyclic alcohols are important precursors for production of pharmaceutical medicines and natural products. (S)-1-(furan-2-yl)propan-1-ol ((S)-2) can be used production of pyranone, which can be used in the synthesis of sugar analogues, antibiotics, tirantamycines, and anticancer drugs. The synthetic approaches for (S)-2, however, have substantial difficulties in terms of inadequate enantiomeric excess (ee) and gram scale synthesis. Moreover, the biocatalytic synthesis of (S)-2 is unknown until now. In this study, the synthesis of (S)-2 was carried out by performing the asymmetric bioreduction of 1-(furan-2-yl)propan-1-one (1) using the Lactobacillus paracasei BD101 biocatalyst obtained from boza, a grain-based fermented beverage. (S)-2 was obtained with >99% conversion, >99% ee, and 96% yield under the optimized conditions. Furthermore, in 50 h, 8.37 g of 1 was entirely transformed into (S)-2 on gram scale (96% isolated yield, 8.11 g). This is the first report on the high-gram scale biocatalyzed synthesis of enantiopure (S)-2. These data suggest that L. paracasei BD101 can be used to bioreduction of 1 in gram scale and efficiently produce (S)-2. Furthermore, these findings laid the base for future study into the biocatalytic production of (S)-2. It was particularly notable as it was the highest known to date optical purity of (S)-2 generated by asymmetric reduction using a biocatalyst. This work offers a productive environmentally friendly method for producing (S)-2 using biocatalysts.
AtıfScopus10WoS10OpenAlex12İncele - MakaleYalnız künye2024Scopus SJRQ1Evaluation of the seismic performance pre- and post-restoration of a masonry clock tower's FE model updated via experimental and optimization methods
Ergün, Mustafa; Tayfur, Bilal
This article presents comprehensive numerical and partial experimental studies to determine the seismic performance of the recently restored masonry clock tower in Bayburt before and after restoration. The numerical dynamic characteristics of the structure are obtained by free vibration analysis conducted on the preliminary finite element model, while the experimental ones are determined through ambient vibration testing. The ultimate finite element models reflecting the actual state of the structure pre- and post-restoration are created through a model updating process based on the principle of minimizing the differences between numerical and experimental dynamic properties via the Tabu Search Algorithm. Dynamic analyses of the models are carried out by the mode superposition method in the time domain, using eleven earthquake ground motion records selected considering the tectonic structure of the region and scaled to the design spectrum explicitly established to the site. Seismic responses are evaluated based on displacement, maximum-minimum principal stress, and maximum-minimum principal strain. The maximum principal stress value, the most critical parameter jeopardizing the safety of masonry structures, is 2.069 MPa before the restoration reaches 2.489 MPa, with an increase of approximately 20.3 % after the restoration. Since this value is less than the tensile strength of the masonry material, 3.120 MPa, it is not at a level that poses any risk to the structure. Other structural reactions also remain below the limit values. Therefore, according to today's seismic hazard analysis criteria, it can be said that the clock tower is safe. However, the North Anatolian Fault Zone, with high tectonic activity passing just south of the city, has the potential to produce severe earthquakes that may affect the region in the future. Therefore, it is necessary to periodically monitor the seismic behaviors of the historical masonry structures in Bayburt and take essential precautions based on the results.
AtıfScopus12WoS11OpenAlex13İncele - MakaleAçık Erişim2024Scopus SJRQ2Optimization of pectin extraction from crab apple peel and usage in a model meat emulsion system
Aldemir, Hazal; Kamiloğlu, Aybike; Çakır, Özlem
The aim of this study was to optimize conditions of microwave-assisted pectin extraction from crab apple peels using the Box–Behnken experimental design. For this purpose, microwave-assisted pectin extraction was performed at different extraction time (3, 6, and 9 min), liquid/solid ratio (75, 100, and 125), and pH (1.5, 2.0, 2.5). The optimum conditions were selected as extraction time (7.77 min), liquid/solid ratio (77.53 mL/g), and pH/1.79). The response, obtained under optimum conditions was determined as 0.1128 ± 0.0137 g pectin/g crab apple peel. In addition, it was determined that the obtained pectin sample had an esterification degree of 79.14% and oil and water binding capacities of 8.5 ± 0.7 g oil/g pectin and 8.1 ± 1.5 g water/g pectin, respectively. It was determined that pectin emulsions showed higher stability at 1% pectin level. The possibilities of using pectin obtained under optimized conditions as a fat replacer in a model sausage system were investigated. Pectin was evaluated in the model sausage system at two different concentrations. With the increasing pectin concentration, the cooking loss value increased from 14 to 18%, while leakage decreased from 0.31% to 0.18%, showing a negative effect on cooking loss and a positive impact on the amount of leakage into the packaging. Pectin obtained from crab apple peel has the potential to be used for reducing fat content in sausage environment.
AtıfScopus15WoS12OpenAlex14İncele - MakaleYayıncıda açık erişim2024Scopus SJRQ3Effects of titanium dioxide nanoparticles against salt and heat stress in safflower cultivars
Dinler, Burcu Seckin; Cetinkaya, Hatice; Koc, Fatma Nur; Gül, Volkan; Sefaoğlu, Fırat
This study aimed to determine the effects of titanium dioxide nanoparticle (TiO2NP) pretreatment on seeds of different safflower cultivars (Balci, Dinçer) under salt and heat stresses. The apparent effects on stress markers (malondialdehyde (MDA), hydrogen peroxide (H2O2) and superoxide radical (O2 •⁻) content), as well as changes in germination and physiological parameters (radicle and plumula weight and length measurements), were investigated. TiO2NP pretreatment caused an increase in radicle length and plumula fresh weight for the Balci cultivar under salinity. Furthermore, plumula dry weight was alleviated with TiO2NP pretreatment for both cultivars. TiO2NP pretreatment improved plumula dry and fresh weights for both cultivars under heat stress. In addition, MDA content decreased for both cultivars under heat stress but only for Balci under salt stress. The amount of O2 •⁻ radicals positively affected only the radicle for both cultivars under heat stress. This study is the first to document the alleviation of salt stress damage for the Balci safflower cultivar, and protection for both Balci and Dinçer cultivars under heat stress, using 200 ppm TiO2NP pretreatment.
AtıfScopus21WoS18OpenAlex24İncele - MakaleYalnız künye2024Scopus SJRQ3Physicochemical Characteristics, Phenolic Components, and Antioxidant Capacities of Lavender Honey (Lavandula Spp.) from Isparta Region of Türkiye
Kolayli, Sevgi; Can, Zehra; Kara, Yakup; Ozkok, Aslı; Ozmert Ergin, Sema; Kemal, Mehmet; Demir Kanbur, Esra
Lavender honey is one of the most desirable blossom honeys for its unique taste and aromatic qualities and can vary significantly from one region to another. In this study, melissopalynological, physicochemical and antioxidant properties of lavender honey from the Isparta region of Türkiye were investigated. The ration of the Lavandula spp. pollen were identified ranging from 9 % to 76 % in the thirteen samples. The average pH, conductivity, moisture, Hunter Lab* and proline values were 3.72, 0.22 mS/cm, 17.17 %, L*: 66.56, a*: 66.32, b*:18.41 and 576.92 mg/kg, respectively. The average F+G and F/G were 67.66 % and 1.02, respectively. The average of total phenolic (TP) and flavonoid (TF) substance were found to be 39.40 mg GAE/100 g and 3.23 mg QUE/100 g, respectively. The average total antioxidant capacity (FRAP) and DPPH radical scavenging activity values were found to be 178.28 μmol FeSO4 ⋅ 7H2O/100 g and 53.09 mg/mL, respectively. In the phenolic component analysis performed with HPLC-PDA, p-OH-benzoic acid, p-coumaric acid, chrysin and pinocembrin were detected as common polyphenols in the samples. Conclusively, despite considerable variability in their monofloral characteristics, no significant differences were observed in the physicochemical and antioxidant properties of lavender honeys.
AtıfScopus18WoS16OpenAlex18İncele - MakaleYalnız künye2024Scopus SJRQ1Design, modelling, environmental, economic and performance analysis of parabolic trough solar collector (PTC) based cogeneration systems assisted by thermoelectric generators (TEGs)
Cuce, Pinar Mert; Guclu, Tamer; Cuce, Erdem
Concentrating solar power systems (CSP) is a very efficient technology for clean and renewable energy production. It basically works on the principle of focusing the sun's rays with the help of a reflective surface. There are two types of CSP systems: point-focused and line-focused. Point-focused ones are parabolic dish collectors and solar towers. Line-focused ones are parabolic trough collectors (PTCs) and linear Fresnel reflectors. It is possible to reach focus temperatures over 1000 °C with point-focused CSPs. Line-focused CSP systems are used to obtain thermal and electrical energy at temperatures below 500 °C. Among CSP technologies, PTCs are widely preferred. While it can be used alone, it can also be used in combination with other power generation systems by creating hybrid systems. In this regard, hybrid PTC/TEG energy systems created with thermoelectric generators (TEGs) come to the fore. These systems have higher electrical and thermal efficiency values compared to traditional PTCs. In this study, CSP systems, PTCs, TEGs and hybrid solar energy systems-based PTCs were examined in detail. It is concluded from the study that the total thermal efficiency of PTC-TEG hybrid systems can be enhanced by up to %70 with respect to PTC systems.
AtıfScopus42WoS40OpenAlex37İncele - MakaleAçık Erişim2024Scopus SJRQ1Production of high strength and colored concrete using textile waste reactive dyestuffs as superplasticizers
Erdem, Emin; Aydın, Gülsüm Merve; Kılınçarslan, Rafet
Herein, we are reporting the effect of reactive dyestuffs, currently widely used in textile industry, on the hydration of Portland cement and their usability as water-reducing additives. For this purpose, solutions containing various ratios (0,005- 0,016 g/100 ml tap water) dyestuffs as superplasticizers were used as mixing water for cements. The effects of these dyes on the hydration of Portland cement were determined by physical tests and DSC-TG-DTG, FT-IR and X-ray diffraction techniques. It was found that the dyestuff added to the cement reduced the cement water/cement ratio (2–7%) and increased the compressive strength (8–13%), depending on the molecular size and structure, and it was also determined that it had no negative effect on cement hydration.
AtıfScopus4WoS4OpenAlex5İncele - MakaleAçık Erişim2024Scopus SJRQ1Validity and reliability of the Turkish version of the transition of primiparas becoming mothers scale
Kirbaş, Zila Özlem; Odabaşi Aktaş, Elif; Özkan, Hava
Background: The transition to motherhood is an important life event in a woman’s life and represents an important developmental process that brings physical, psychological and social changes to gain a new role. However, research on the transition to motherhood in Turkish society is scarce. There is a need for a comprehensive, practical and reliable tool to evaluate the transition to motherhood in primiparous mothers. This study evaluated the reliability and validity of the Turkish version of the Transition of Primiparous Becoming Mothers Scale (TMP-S) to evaluate the transition process of primiparous mothers to motherhood. Methods: This methodological research was carried out in obstetrics and gynecology outpatient clinics, pediatric outpatient clinics, and family health centers of a hospital in Türkiye. The sample consisted of primiparous mothers of 0 to 6- month-old babies who visited clinics and family health centers for routine postnatal examinations (n = 305). After evaluating the language equivalence and content validity of the scale, test-retest reliability, internal consistency and construct validity were examined. Factor analysis, Pearson’s correlation, retest reliability, and Cronbach’s alpha were employed to evaluate structural validity and reliability. Results: The final TPM-S had two dimensions with 25 items. Exploratory factor analysis revealed a two-factor solution, which accounted for 59.276% of the variance. Confirmatory factor analysis showed that the model fit of the two-factor model also reached a satisfactory model ft after modification. The comparative fit index was 0.894, the Tucker‒Lewis index was 0.882, and the root mean square error of approximation was 0.079. The content validity index of the scale ranged from 0.56 ~ 0.77. The Cronbach’s alpha coefficient was 0.93 for the total scale, and the test–retest reliability was 0.96. Conclusions: It is a valid and reliable tool for evaluating the transition to motherhood among primiparous mothers of 0 to 6 month-old babies in Türkiye. Turkish researchers and healthcare professionals can routinely apply this measurement tool to primiparous mothers in the first six months after birth to evaluate their transition to motherhood.
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