Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Uzun, Sevda(64)
- Merdan, Mehmet(47)
- Baltaci, Cemalettin(35)
- Kulakaç, Nurşen(28)
- Duran, Celal(27)
- Ozdes, Duygu(24)
- Turan, Ibrahim(24)
- Demir, Selim(23)
- Türkkan, Tuğba(22)
- Bayrakdaroglu, Serdar(21)
- Topal, Fevzi(21)
- Öztürk, Serkan(21)
- Ürkek, Bayram(21)
- Gücer, Mehmet Ali(20)
- Akar, Zeynep(19)
- Kaygusuz, Abdullah(19)
- Topal, Meryem(19)
- Anaç, Halil(18)
- Aydin, Aydanur(18)
- Batan, Nevzat(18)
- Erata, Hüseyin(18)
- Tuncer, Metin(18)
- Akyürek, Suat(17)
- Baltacı, Cemalettin(17)
- Karimullah, Suud Sarim(17)
- Acet, Tuba(16)
- Akar, Bülent(16)
- Ashyralyyev, Charyyar(16)
- Düzgün, Azer Özad(16)
- Hintistan, Sevilay(16)
- Yılmaz, Coşkun(16)
- Aliyazicioglu, Yuksel(15)
- Kaya, Hacer(15)
- Kurnaz, Muammer(15)
- Kurt, Kemal(15)
- Ozden, Talat(15)
- Yilmaz, Coskun(15)
- Yuksel, Ferhat(15)
- Yücel, Cem(15)
- Öz, Mehmet(15)
Yayınlar
- MakaleAçık Erişim2025Scopus SJRQ2In vitro glycemic index, acrylamide content, and some physicochemical and sensorial properties of special dried bread (Peksimet) enriched with einkorn wheat (Tiriticum monococcum L.) flour
Yuksel, Ferhat; Çağlar, Sümeyye
In the present study, einkorn wheat flour (Tiriticum monococcum L.) was incorporated into a special dried bread (peksimet) formulation produced from sourdough breads at different concentrations (0–10–20–30–40 and 50 g 100 g−1) and some physicochemical and nutritional (total dietary fiber, resistant starch, glycemic index, acrylamide content) characteristics and sensory properties of the samples were investigated. The total dietary fiber content of the bread samples ranged from 3.00 to 6.17 g 100 g−1. The highest acrylamide content (247.54 µg/kg) was obtained using an einkorn flour level of 40 g 100 g−1. Einkorn wheat flour resulted in a significant decrease (from 94.61 to 89.23) in the glycemic index level of the bread samples (p < 0.05). Bread enriched with einkorn wheat flour (50.0 g 100 g−1) received the highest overall acceptability score. In conclusion, einkorn wheat flour could be used in a special dried bread formulation to enhance its nutritional quality.
AtıfScopus1WoS1OpenAlex1
İncele - MakaleAçık Erişim2025Scopus SJRQ1Nursing students' cybersecurity practices and perceptions and cybersecurity crime awareness: A cross-sectional study
Yalcinkaya, Turgay; Tuncer, Metin; Tuncer, Gülsüm Zekiye; Erol, Ahmet; Cinar Yucel, Sebnem
Background: Cybersecurity has become a critical issue with the increasing use of digital platforms in healthcare. Understanding nursing students' cybersecurity practices, perceptions, and cybercrime awareness is essential for improving healthcare security and developing strategies to mitigate cyber threats. Aim: This study aimed to determine nursing students' cybersecurity practices, perceptions, and cybercrime awareness. Design: A descriptive cross-sectional design was used. Setting: The study was conducted between April and June 2024 at a School of Nursing within a public university in Türkiye. Participants: A total of 434 undergraduate nursing students participated in the study. Methods: Data were collected face-to-face using a paper-and-pencil technique. The data collection tools used included the Personal Information Form, Cyber Security Scale (CSS), and Cyber Crime Awareness Scale (CAS). Data analysis utilised descriptive statistical methods, Pearson correlation analysis, independent samples t-test, ANOVA, and linear regression analysis. Results: The study revealed that 92.9 % of the students had not received any prior cybersecurity education. The mean CSS score was 87.50 ± 11.40, and the mean CAS score was 174.75 ± 36.75. A moderate positive correlation was found between the CSS and CAS scores (r = 0.576, p < 0.01). A positive relationship was found between computer usage skills and CSS scores (r = 0.190, p < 0.01), while a weak negative correlation was observed between internet usage duration and CSS scores (r = −0.095, p < 0.05). No relationships were identified between the CSS score and age, gender, or cybersecurity education. Linear regression analysis showed that higher computer usage skill levels were significantly associated with increased CSS scores (B = 1.129, p < 0.001). Conclusions: The findings highlight the importance of integrating cybersecurity education into the nursing curriculum. Enhancing cybersecurity awareness and practices may help protect patient data and support safer healthcare by better preparing nursing students for cyber threats.
AtıfScopus1WoS1İncele - MakaleAçık Erişim2025Scopus SJRQ1Mandala coloring reduces anxiety and pain in circumcised children: A randomized controlled trial
Akay, Gamze; Koç, Elif Simay; Oğuzhan, Hatice
Background: Boys often experience significant fear and anxiety before the circumcision procedure, and postoperative pain is linked to increased fear and anxiety in children. Objectives: The aim of this study was to determine the effect of mandala coloring on fear, anxiety, emotional symptoms and postoperative pain of circumcised children. Methods: This randomized controlled trial was conducted in the pediatric clinic of a state hospital in eastern Turkey. Children were divided into two groups using a computer program: Group 1 (control) included children with no intervention (n = 40), and Group 2 (mandala coloring) included children who received mandala coloring (n = 38). Statistical analyses were performed using the Kolmogorov-Smirnov test to assess the normality of the data, the chi-squared test to compare categorical variables between groups, the paired samples t-test for within-group comparisons, the independent samples t-test for between-group comparisons, and mixed model repeated measures ANOVA (rANOVA) to evaluate the temporal changes in pain and anxiety scores across groups. Findings: Children's fear, anxiety, emotional symptom, and postoperative pain scores were similar in all groups before the nursing intervention, and the fear, anxiety, and emotional symptom scores of the mandala painting intervention group were statistically lower than the control group after the nur csing intervention. The pain scores of the children in the mandala coloring group were lower than the control group after surgery. Conclusion: Mandala coloring intervention can be used to reduce emotional symptoms, fear, anxiety and postoperative pain in children aged 6–12 years undergoing circumcision.
AtıfScopus8WoS6OpenAlex8İncele - MakaleAçık Erişim2025Scopus SJRQ2The effect of psychoeducation on hope, loneliness and depression of nursing students who experienced 6 February 2023 Turkey earthquake
Çakmak, Seher; Uzun, Sevda; Dere, Cansu; Akdemir, Rabia Rümeysa; Baygin, Şevval; Çoban, İclal Gül
Psychoeducation after a traumatic event can help reduce negative effects by providing a cognitive framework for one’s experience. It can also enable trauma survivors to increase their ability to help coping. The aim of this study was to examine the effect of psychoeducation on hope, loneliness and depression in nursing students who experienced 6 February 2023 Turkey earthquake. The study, which was conducted in experimental design, included 40 students who experienced the February 6 earthquake. 20 students were assigned to the psychoeducation group and 20 students to the control group. Students in the psychoeducation group received six sessions of psychoeducation, while students in the control group were not intervened. ’Personal Information Form’, ‘Beck Hopelessness Scale’, ‘UCLA Loneliness Scale’ and ‘Beck Depression Scale’ were used to collect the data. Mean, standard deviation and percentage calculations, chi-square test and t test were used to analyze the data. Sociodemographic characteristics of the students in the psychoeducation and control groups were similar except for the place of residence (p > 0.05). It was determined that the mean score of the hope sub-dimension of the ’Beck Hopelessness Scale’ was statistically significantly higher in the control group (p < 0.05). It was determined that there was no statistically significant difference between the students in the psychoeducation and control groups in terms of hopelessness levels and mean scores of ‘UCLA Loneliness Scale’ and ‘Beck Depression Scale’ (p > 0.05). There was a statistically significant difference between the students in the psychoeducation and control groups in terms of depression levels (p < 0.05). In conclusion, psychoeducation was partially effective on hope and depression and not on loneliness in students who experienced the earthquake. Students in the psychoeducation group had lower levels of depression. It is recommended that students experiencing natural disasters such as earthquakes should be monitored by a specialized psychologist and the duration of psychoeducation should be regulated.
AtıfScopus2WoS2OpenAlex3İncele - MakaleAçık Erişim2025Scopus SJRQ4The analysis of Caputo-Fabrizio fractional plastic waste model with a new numerical method; [Caputo-Fabrizio kesirli mertebeden plastik atık modelinin yeni bir sayısal yöntemle analizi]
Bingöl, Sait; Anaç, Halil
In this paper, the new numerical solutions for Caputo-Fabrizio fractional plastic waste model are derived utilizing a novel hybrid approach known as the Caputo-Fabrizio fractional q-formable homotopy analysis transform method. A novel hybrid method combining the Caputo-Fabrizio transform and the q-homotopy analysis method is introduced. A plastic waste model generally denotes a conceptual or mathematical framework employed to comprehend, simulate, or forecast the movement, accumulation, and effects of plastic trash within a system, spanning from local surroundings to the global scale. The plastic waste model is analyzed in the Caputo-Fabrizio fractional framework. The solutions for the Caputo-Fabrizio fractional plastic waste model are illustrated in the Maple program.
- MakaleAçık Erişim2025Scopus SJRQ2Maximizing phonation: impact of inspiratory muscle strengthening on vocal durations and pitch range
Yilmaz, Coşkun; Bostanci, Özgür; Eken, Özgür; Alkahtani, Rania; Aldhahi, Monira I.
Background: This study investigated the acute effects of inspiratory muscle warm-up (IWU) on vocal performance in singers. Proper vocal and respiratory warm-up can enhance vocal range, quality, and endurance. The aim was to determine whether IWU improves maximum phonation time and pitch range, contributing to better voice production efficiency (vocal efficiency) and reduced fatigue. Materials and methods: Singers were selected from the Samsun State Opera and the Ballet Directorate (n = 16). This cross-sectional study aimed to investigate the acute effects. The singers in the control group (SC = 8) performed only one session of routine voice warm-up, and the experimental group (SE = 8) conducted an inspiratory muscle warm-up (IWU) of 2 sets, 30 times/set at 40% maximal inspiratory pressure (MIP) in addition to routine voice warm-up. Subsequently, All participants were then required to perform pre- and post- pulmonary function tests, maximal inspiratory pressure (MIP) and maximal expiratory pressure (MEP), and voice recordings (note high pitch, note low pitch, high pitch durations and low pitch durations sustained with one breath, and maximum phonation duration). Results: All pulmonary function and muscle strength parameters improved in the SE group, with the highest increases in MIP (22.9%) and MEP (14.7%). No significant improvements were noted in the SC group (p > 0.05). The Borg Rating of Perceived Exertion showed that the SE group experienced less difficulty with their vocal performance after IWU (-11.6%, p = 0.006), while no significant change was observed in the SC group (p = 0.316). Both warm-up methods used in the study significantly affected the frequencies of high-pitch sounds (SE = 17.8%, SC = 10.9%, p = 0.003); however, the frequency of low-pitch sounds was not significantly affected (p = 0.437). IWU significantly affected the high-pitched note duration (p < 0.001; 32.17%), low-pitched note duration (p < 0.001; 27.11%), and maximum phonation time (p < 0.001; 21%), while routine voice warm-up did not significantly affect any parameter (p > 0.05). Conclusions: The combination of IWU with the general body and voice warm-up protocol can acutely improve vocal performance in terms of maximum phonation time, phonation times of the highest and lowest pitched sounds in a single breath, and vocal range levels.
AtıfScopus9WoS5OpenAlex8İncele - MakaleAçık Erişim2025Scopus SJRQ1The perspectives of nurses, as prominent advocates in sustainability, on the global climate crises and its impact on mental health
Ediz, Çiçek; Uzun, Sevda
Objective: To evaluate the perspective of nurses in Turkey towards the global climate crisis and its impact on mental health using a qualitative approach. Materials and Method: This study was conducted from August to September 2023 with 35 nurses living in seven regions of Turkey using an inductive qualitative approach. The researchers employed the snowball sampling method to select participants. Interviews with the participants were conducted until data saturation was reached. Thematic analysis was used to emerge themes. Results: The findings revealed five main themes (perception of the global climate crisis, effects of the global climate crisis, effects of the global climate crisis on mental health, reflections of the global climate crisis on nursing and nurses' views on prevention and intervention studies for the global climate crisis). Also, the findings revealed 12 sub-themes (physical outcomes, mental outcomes, direct and indirect impacts, psychosocial effects and personal, national and international-based reflections). Conclusion: Our study indicates that nurses exhibit genuine concern for the global climate crisis and experience psychological effects related to this pressing environmental issue. Nurses are keenly aware of their responsibility to safeguard the planet and demonstrate a strong sense of concern for the state of the world. Impact: It is evident that nurses, being prominent advocates for sustainability, are cognizant of their responsibility to protect the planet and demonstrate genuine apprehension for the state of the world. Implications: Nurses play a crucial role, as they make up 60% of the global healthcare workforce and are often the frontline healthcare professionals during natural disasters. It is vital to elucidate and clarify the terminology concerning the relationship between the climate crisis and the mental health of nurses, to determine the scope of this relationship and to make recommendations for future research areas. Patient or Public Contribution: No patient or Public Contribution.
AtıfScopus15WoS13OpenAlex15İncele - MakaleAçık Erişim2025Scopus SJRQ2Novel Sulfonylhydrazones With Sulfonate Ester Framework: Promising Dual Inhibitors of AChE and hCAs
Öztürk, Cansu; Balci, Neslihan; Aslan, Osman Nuri; Kalay, Erbay
Alzheimer's disease (AD) is a progressive neurodegenerative disorder that affects millions of individuals worldwide. Treatment strategies for AD vary depending on cognitive and behavioral symptoms, with cholinergic replacement therapy using acetylcholinesterase (AChE) inhibitors being one of the primary approaches. Recent studies have also identified human carbonic anhydrases (hCAs) as significant therapeutic targets for AD, offering new opportunities for the development of innovative treatments. Carbonic anhydrase inhibitors have been shown to prevent early mitochondrial damage and inhibit H2O2 production, thereby reducing amyloid plaque formation. Building on the promising potential of hydrazones particularly sulfonyl hydrazones as anticholinesterase agents, we synthesized 12 novel chlorine-substituted sulfonyl hydrazone compounds containing aryl sulfonate ester groups. These compounds were evaluated for their inhibitory effects on AChE, hCA I, and hCA II enzymes. The synthesized compounds exhibited low nanomolar inhibitory activity, with Ki values ranging from 9.58 ± 2.22 to 104.04 ± 23.82 nM for AChE, 9.12 ± 2.21 to 477.63 ± 218.52 nM for hCA I, and 17.54 ± 7.74 to 564.62 ± 213.98 nM for hCA II. Notably, compound 6 showed strong inhibitory activity against hCA I (Ki = 9.12 ± 2.21 nM; acetazolamide (AZA) = 26.54 ± 3.11 nM) and hCA II (Ki = 17.54 ± 7.74 nM; AZA = 21.73 ± 2.42 nM), whereas compound 4 exhibited superior AChE inhibition (Ki = 9.58 ± 2.22 nM; TAC = 23.12 ± 2.05 nM). The chemical structures of the synthesized compounds were characterized using advanced spectroscopic techniques, including FT-IR, 1H-NMR, and 13C-NMR spectroscopy.
AtıfScopus12WoS11OpenAlex9İncele - MakaleAçık Erişim2025Scopus SJRQ4A deep learning approach powered by GhostNet for skin cancer classification; [GhostNet tabanlı derin öğrenme yaklaşımı ile cilt kanseri sınıflandırması]
Almasani, Heba; Ture, Hayati
Skin cancer, especially melanoma, continues to cause a disproportionate percentage of cancer-related deaths despite its high curability when detected early. This work presents an efficient deep-learning system aimed at the binary classification of dermoscopic images as malignant or benign using the GhostNet family of convolutional neural networks (CNNs). The publicly available ISIC-2019 dataset was used for training its extreme class imbalance was corrected using a hybrid Synthetic Minority Over-sampling Technique coupled with Edited Nearest Neighbours (SMOTE-ENN). End-to-end fine-tuning of three variants of GhostNet (V1, V2, V3) was performed with preprocessing, augmentation, and hyper-parameters kept constant to ensure a fair model-to-model comparison. Evaluation metrics used were accuracy, precision, recall, F1-score, and the area under the receiver-operating-characteristic curve (AUC). GhostNet V2, augmented with depth-wise attention, gave the strongest results: 95% accuracy, 94% malignant class recall, F1-score of 94.3%, and an AUC of 0.99. GhostNetV2 performed better than both the baseline V1 and V3 without having a parameter count that would prevent real-time inference on mobile hardware. These results of Accuracy, sensitivity, F1-score, AUC and recall show that, when combined with targeted imbalance correction, efficient architectures such as GhostNet are capable of dermatologist-level sensitivity without the computational requirements of heavier models, and thus are feasible for point-of-care or resource-constrained settings. It is complementary to our previous work with other CNNs, allowing model-to-model comparison directly.
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İncele - MakaleAçık Erişim2025Scopus SJRQ2Insight into the adsorptive removal of Cr(VI) ions and 4-chlorophenol from aqueous media on cationic surfactant-modified cucumber peels
Ozeken, Sengul Tugba; Ozdes, Duygu; Duran, Celal
A new and cost-effective adsorbent material was developed by chemical modification of cucumber peels (CP) with a cationic surfactant, cetyltrimethylammonium bromide (CTAB). The adsorptive behavior of CTAB-modified cucumber peels (CMCP) was investigated in the retention of an organic pollutant (4-chlorophenol) and an inorganic pollutant (Cr(VI)) through batch experiments. The adsorbents were characterized by Fourier transform infrared spectroscopy (FTIR) analysis and scanning electron microscopy (SEM) technique. Influences of initial concentrations of both pollutants, dosage of CMCP, initial solution pH, contact time, and foreign ions were parameters used to specify the optimized conditions. Results of the experiments were evaluated by three kinetic models, namely pseudo-first-order, pseudo-second-order, and intraparticle diffusion models, to find out the dominant mechanisms in the retention of 4-chlorophenol and Cr(VI). Langmuir, Freundlich, and Dubinin–Radushkevich isotherm models were applied to the adsorption data to estimate the adsorption capacity of CMCP and to describe the interactions between the species. Langmuir isotherm model fitted the data well, and the maximum Cr(VI) and 4-chlorophenol adsorption capacities of CMCP were 84.03 mg g−1 and 107.5 mg g−1, respectively. Consequently, CMCP demonstrated outstanding performance in the adsorption of both inorganic and organic pollutants, offering a low-cost, easily prepared alternative to other adsorbents reported in the literature.
AtıfScopus3WoS3OpenAlex3İncele - MakaleAçık Erişim2025Scopus SJRQ1Enhancing mineral processing with deep learning: Automated quartz identification using thin section images
Külekçi, Gökhan; Hacıefendioğlu, Kemal; Başağa, Hasan Basri
The precise identification of quartz minerals is crucial in mineralogy and geology due to their widespread occurrence and industrial significance. Traditional methods of quartz identification in thin sections are labor-intensive and require significant expertise, often complicated by the coexistence of other minerals. This study presents a novel approach leveraging deep learning techniques combined with hyperspectral imaging to automate the identification process of quartz minerals. The utilizied four advanced deep learning models—PSPNet, U-Net, FPN, and LinkNet—has significant advancements in efficiency and accuracy. Among these models, PSPNet exhibited superior performance, achieving the highest intersection over union (IoU) scores and demonstrating exceptional reliability in segmenting quartz minerals, even in complex scenarios. The study involved a comprehensive dataset of 120 thin sections, encompassing 2470 hyperspectral images prepared from 20 rock samples. Expert-reviewed masks were used for model training, ensuring robust segmentation results. This automated approach not only expedites the recognition process but also enhances reliability, providing a valuable tool for geologists and advancing the field of mineralogical analysis.
AtıfScopus12WoS11OpenAlex14İncele - MakaleAçık Erişim2025Scopus SJRQ3Turkish Version of the Sense of Belonging in Nursing School Scale: Validity and Reliability for Nursing Students
Tuncer, Metin; Tuncer, Gülsüm Zekiye; Yalçınkaya, Turgay; İnce, Merve; Yücel, Şebnem Çınar; Khorshid, Leyla
Background: While a sense of belonging may be necessary for human motivation, the disruption of this sense of belonging among nurses can have implications for patient care and safety. Aim: This article was aimed at assessing the sense of belonging experienced by nursing students in three different settings (clinic, classroom, and student group) by conducting the validity and reliability of the Sense of Belonging in Nursing School (SBNS) scale, adapting it to the Turkish language and culture, and reporting the results. Methods: The study was conducted in a nursing faculty between March and July 2023. The study sample comprised 193 nursing students. We performed the content validity assessment of the 19-item SBNS scale after conducting a structural validity analysis using exploratory factor analysis and confirmatory factor analysis (CFA). The Cronbach’s alpha and item-total score correlations were examined to assess the scale’s internal consistency. Results: The Kaiser–Meyer–Olkin measure of sampling adequacy for the SBNS instrument was 0.903, and the result of Bartlett’s test of sphericity was significant (χ² = 3182.764, p = 0.000), indicating that the scale was suitable for factor analysis. The eigenvalue analysis identified a four-factor structure explaining 76.74% of the total variance. These four factors were subsequently named as follows: (1) clinical compliance, (2) social belonging, (3) school support, and (4) clinical support. The goodness-of-fit values for the model obtained from the CFA were χ2/SD = 2.15, comparative fit index = 0.947, goodness-of-fit index = 0.852, normed fit index = 0.906, incremental fit index = 0.948, and root mean square error of approximation = 0.077, suggesting that the model fit was acceptable, and the four-factor structure was well distributed. The scale exhibited high internal consistency (α = 0.933). Discussion: The SBNS scale is a reliable and valid instrument for measuring the sense of belonging experienced by nursing students in three different environments. Further research is needed to establish its predictive validity. Conclusions and Implications for Nursing: This study was conducted, and there was no scale used in the Turkish literature to measure nursing students’ sense of school belonging; thus, it is the first in this sense.
AtıfScopus1WoS1OpenAlex1İncele - MakaleAçık Erişim2025Scopus SJRQ3Psychometric evaluation and cultural adaptation of the Turkish version of the needs assessment tool: progressive disease-heart failure (NAT: PD-HF)
Kiliç, Betülay; Palaz, Ilknur; Gürel, Tugba Yardimci
Heart failure (HF) is a progressive, life-limiting condition that often leads to complex physical, emotional, and social needs. This study aimed to translate, culturally adapt, and validate the Turkish version of the Needs Assessment Tool: Progressive Disease-Heart Failure (NAT: PD-HF) to facilitate the timely identification of palliative care needs. A total of 98 patients with chronic HF, 91 caregivers, and 25 healthcare professionals participated in this single-centre validation study. The tool underwent forward-backward translation and pilot testing. Internal consistency was good (Cronbach’s α = 0.812), and inter-rater and test-retest reliabilities were high (PABAK: 0.908–1.000). Most patients (84.7%) found the tool understandable, and 67.7% felt it enhanced care. Healthcare professionals from cardiology, intensive care, and palliative care rated it as clinically relevant and feasible. The Turkish NAT: PD-HF is a valid, reliable, and culturally appropriate tool for identifying the palliative care needs of patients with HF and their caregivers. This tool can be integrated into routine clinical practice to facilitate early identification of palliative care needs.
- MakaleAçık Erişim2025Scopus SJRQ2Niche dynamics and climate change sensitivity in western Palearctic Zamenis ratsnakes (Reptilia: Colubridae)
Vaissi, Somaye; Kürşat Şahin, Mehmet; Kurnaz, Muammer
Climate change poses a significant threat to ectothermic, dispersal-limited reptiles such as Zamenis snakes in the western Palearctic. This study used ensemble ecological models to assess the potential distribution of six Zamenis species under climate change scenarios (SSP1-2.6 and SSP5-8.5). In addition, we examined niche dynamics through overlap, equivalency, and similarity analyses. Results reveal distinct ecological niches for each species, primarily influenced by temperature and precipitation. Projected distribution shifts vary across species, with some species like Z. persicus and Z. situla showing potential for range expansion, while others such as Z. lineatus and Z. scalaris face significant habitat loss. Z. hohenackeri and Z. longissimus exhibit complex patterns of both expansion and contraction. Niche analyses indicate varying degrees of overlap among species, with a trend toward niche conservatism. This study underscores the importance of niche ecology in understanding climate change impacts and highlights the need for species-specific conservation strategies.
AtıfScopus8WoS8İncele - MakaleAçık Erişim2025Scopus SJRQ3MODELING THE KINETICS OF HYDROXYMETHYLFURFURAL (HMF) FORMATION IN POMEGRANATE SOUR PRODUCED BY DIFFERENT EVAPORATION METHODS
Erdoğdu, Esma Gülbahar; Akar, Bülent; Baltacı, Cemalettin
Pomegranate sour is a traditional functional food that is widely consumed in Türkiye. The aim of this study is to determine the most convenient evaporation method to keep the amount of HMF, a carcinogenic substance formed as a result of high temperatures in the production of pomegranate sour, at low levels. The pomegranate sours were produced using five different evaporation methods (atmospheric pressure (AP), freeze-drying (FD), open air (OA), vacuum assisted (VA) and fan assisted (FA)) and the amount of HMF formed during the process was determined. Kinetic calculations showed that VA and FA methods followed first-order reaction kinetics at 60, 70 and 80 °C, while OA, FD and AP methods followed zero-order reaction kinetics at 80, 90 and 100 °C. The mean Q10 value was 1.0006, while the activation energy (Ea) ranged from 72.56 to 126.38 kJ/mol. It was found that the amount of HMF formed varied according to the method, temperature and production time and that the reaction rates increased with increasing temperature, especially for the OA method. In addition, pH, titratable acidity, invert and total sugar content, color, Brix and browning index were analyzed and a kinetic model including all these factors was developed.
AtıfOpenAlex1İncele - MakaleAçık Erişim2025Scopus SJRQ1Hydrodynamic optimization of full-scale aeration tanks using field measurements and computational fluid dynamics modeling
Yılmaz Çelik, Damla; Yılmaz, Naz; Şibil, Rahim; Aras, Egemen; Vaheddoost, Babak
Improving energy efficiency and operational performance in wastewater treatment plants largely relies on precise hydrodynamic analysis. In this context, field-based studies are essential for understanding system behavior under real operational conditions. This study was conducted at a full-scale wastewater treatment plant, where flow dynamics in the aeration tank were evaluated through extensive field measurements and computational fluid dynamics modeling. Data were collected from 98 locations across 15 different depth levels using an Acoustic Doppler Current Profiler and a Hach FH950 velocity meter. The numerical model was initially validated with the help of experimental field data, enabling an accurate assessment of flow characteristics at varying depths. Results revealed that the low-velocity zones and non-uniform velocity distributions negatively affect system performance. It is also concluded that the inlet and outlet positions disturb the favorable circulation patterns and flow uniformity. Geometric optimization strategies were implemented to develop solutions, which led to a more uniform velocity distribution and improved hydraulic efficiency. By integrating detailed field measurements with numerical modeling, this study provides a comprehensive understanding of aeration tank hydrodynamics and offers practical design recommendations for improving overall system performance.
AtıfScopus6WoS6OpenAlex5İncele - MakaleAçık Erişim2025Scopus SJRQ2Disaster Management Experiences and Psychosocial Problems of Individuals Who Survived the Earthquake in Turkey in the Earthquake of the Century: A Phenomenological Study
Ulutaşdemir, Nilgün; Uzun, Sevda; Kulakaç, Nurşen
Aim: The aim of this study is to examine the disaster management experiences and psychosocial problems of individuals who survived the earthquake in Turkey during the earthquake of the century. Materials and Methods: A qualitative research design, phenomenological research, was applied in this study. This qualitative study included 33 volunteer earthquake survivors. The interviews were conducted using WhatsApp. Colaizzi's phenomenological analysis method was used to analyze the data. Results: In the analysis of the data, five themes (perception of the earthquake concept, things to do during an earthquake, actions taken to survive under the rubble, meeting everyday chores and dealing with post-earthquake challenges, perceptions of disaster management), and fifteensubthemes (features of the earthquake, emotions, thoughts, correct actions, incorrect actions, actions for the body, situation-oriented actions, housing, nutrition, hygiene, sleep, security, preparation, coping, and intervention) were identified. Conclusion: The study showed that the earthquake negatively affected individuals psychosocially, but the effective spiritual coping mechanisms utilized to cope with the catastrophic event under the rubble supported the survival process. In addition, it was determined that the participants believed that religion and spirituality were important in coping with the earthquake.
AtıfScopus4WoS4OpenAlex4İncele - MakaleAçık Erişim2025The Impact of Militarisation on Environmental Degradation in the E7 Countries: Panel CS-ARDL Approach
Yildiz, Gizem Akbulut; Yildiz, Barış; Al, İbrahim; Kanca, Osman Cenk
This paper, within the framework of the Environmental Kuznets Curve (EKC), investigates the impact of militarisation on environmental degradation, including the role of renewable energy. Military expenditure and burden are used as proxies for militarisation, and models are estimated to quantify their relationship with carbon dioxide (CO2 ) emissions. The study utilizes the CS-ARDL approach to analyse data from Brazil, China, India, Indonesia, Mexico, Russia, and Turkey collectively known as the E7 nations from 1992 to 2022. The method employs both fixed-effect and random-effect models, taking into account short-run and long-run coefficients while accounting for cross-sectional dependencies and heterogeneities. The study puts forward four hypotheses for investigation, and a notable finding is that military expenditure, contradicting prevalent sustainability assumptions, has a substantial impact on the reduction of CO2 emissions over both short and long-run periods. This suggests that within the E7 context, militarisation may paradoxically function as a catalyst for environmental conservation rather than a detrimental impact. The findings further corroborate the inverted U-shaped EKC hypothesis by demonstrating that while economic growth initially increases emission levels, these levels begin to decline once a certain income threshold is reached. The study also underscores the long-run benefits of renewable energy in reducing CO2 emissions and advocates for investment in green energy projects, complemented by implementing viable environmental policies. These insights offer actionable guidance for policymakers seeking to harmonize economic development with environmental protection and sustainability objectives.
- MakaleAçık Erişim2025Scopus SJRQ3Evaluation of antibacterial, antioxidant activities and secondary metabolites profile of orchids with different dried methods
Ozkan, Ahmet Ismail; Canbolat-Gültekin, Deniz; Soruklu, Sudenaz; Işik, Uğur; Akmeşe, Osman
The Central Black Sea region is a very dense region in terms of orchid diversity. As a consequence of the floral studies, 32 species of salep orchids were identified in the Central Black Sea Region. The aim of this current study was to identify the secondary metabolite profiles of leaves and tubers of two orchid species (Anacamptis palustris and Ophrys apifera) with different drying methods by HPLC analysis and to determine their antibacterial and antioxidant activities. For this purpose, different drying methods were applied to the roots and leaves of these two species. The species were dried by 3 different techniques: shade, lyophilizer and oven. After the aqueous extracts were obtained, their antibacterial and antioxidant activities were tested and HPLC analysis was completed. The data obtained from aqueous extracts as a result of drying techniques were compared with the data obtained from fresh plant aqueous extracts. Antibacterial properties were tested against Staphylococcus aureus ATCC 25923, Escherichia coli ATCC 25922 and Pseudomonas aeruginosa ATCC 27853 bacteria. No antibacterial activity was found in the study. Antioxidant properties were tested via DPPH and FRAP assays. As a result of DPPH free radical scavenging assay, the highest antioxidant efficiency in A. palustris was observed in leaves dried in lyophilizer (76.53%), in the shade (62.13%) and in the oven (54.12%), respectively. Nine different phenolic compounds were found in aqueous extracts of these species. Epicatechin, Gallic Acid, Rutin, Syringic Acid phenolic compounds were observed the most in HPLC analysis. The results of current study suggest that these extracts have antioxidant and phenolic contents and should be investigated in more comprehensive studies.
AtıfScopus2WoS1OpenAlex1İncele - MakaleAçık Erişim2025Scopus SJRQ2Energy-Efficient 8-PAM Optical DAC Design for Visible Light Communication Systems
Başer, Oğuzhan; Küçük, Mehmet Ali; Albayrak, Cenk; Türk, Kadir
This paper presents a cost-effective and energy-efficient optical digital-to-analog converter (ODAC) transmitter scheme for visible light communication (VLC) systems. The proposed ODAC transmitter enables data transmission while providing lighting, as desired in VLC systems, unlike existing ODAC structures in the literature, by switching power LEDs at high speeds with a MOSFET-based switching circuit design. This paper also discusses the ODAC design stages and presents the points to be considered in detail. In addition, by implementing the hardware design of an ODAC transmitter with a 3-bit resolution, that is, capable of generating 8-PAM signals, based on the proposed ODAC architecture, experimental studies are conducted for energy efficiency and communication performance results via the established VLC system using the designed ODAC. Experimental results demonstrate that the proposed ODAC transmitter achieves a data transmission rate of 18.75 Mbps with a bit error rate (BER) below the forward error correction (FEC) limit at a communication distance of 4 m, while also exhibiting a high power efficiency of 94%.