Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Uzun, Sevda(62)
- Merdan, Mehmet(58)
- Duran, Celal(50)
- Ozdes, Duygu(47)
- Kaygusuz, Abdullah(43)
- Ashyralyyev, Charyyar(38)
- Karsli, Orhan(33)
- Öztürk, Serkan(32)
- Araz, Onur(31)
- Demir, Selim(29)
- Kulakaç, Nurşen(29)
- Dokuz, Abdurrahman(28)
- Arslan, Mehmet(27)
- Baltacı, Cemalettin(27)
- Maden, Nafiz(27)
- Sipahi, Ferkan(27)
- Topal, Fevzi(27)
- Turan, Ibrahim(27)
- Kandemir, Raif(25)
- Kurt, Kemal(24)
- Ozturk, Samet(24)
- Peker, Iskender(24)
- Vural, Alaaddin(24)
- Reis, Hatice Catal(23)
- Yücel, Cem(23)
- Aydin, Faruk(22)
- Baltaci, Cemalettin(22)
- Gücer, Mehmet Ali(22)
- Günen, Mehmet Akif(22)
- Kankal, Murat(22)
- Topal, Meryem(22)
- Karimullah, Suud Sarim(21)
- Uysal, Ibrahim(20)
- Kurnaz, Muammer(19)
- Tuncer, Metin(19)
- Yolcu, Halil(19)
- Çelik, Necati(19)
- Ürkek, Bayram(19)
- Şan, Murat(19)
- Aliyazicioglu, Yuksel(18)
Yayınlar
- MakaleAçık Erişim2026Investigation of Noise Exposure Levels in Furniture Industry: The Impact of Enterprise Scale and Machine Operational States; [Istraživanje razina izloženosti buci u industriji namještaja: utjecaj veličine poduzeća i radnih stanja strojeva]
Öztürk, Erhan; Komut, Osman; Fidan, Muhammed Said
The furniture industry is characterized by the intensive use of cutting, shaping, and surface-treating machinery, which naturally generates high noise levels. This study aimed to assess noise exposure levels in furniture manufacturing facilities by examining the effects of enterprise scale, machine types, and working conditions (loaded and unloaded) on occupational health and safety (OHS). The study was conducted in a total of 30 enterprises, 10 at each enterprise scale level. Physical risk factor data for noise were recorded using on-site measurements for the machines and production lines used at each enterprise level, depending on various variables. ANOVA, T-test, and Correlation analyses were performed to determine the relationships between the variables. The results revealed that small-scale businesses were the riskiest group in terms of noise levels. Generally, although measured noise levels in workplaces remain below the highest exposure action value of 85 dB, critical levels have been detected under specific machinery and working conditions. In machine-based assessments, the critical machines exceeding the highest exposure value of 85 dB are: In small-scale businesses – planing machine (95.26 dB), circular saw (88.08 dB) and band saw (86.81 dB); in micro-scale businesses – CNC drilling machine (91.13 dB), CNC sizing machine (88.01 dB) and band saw (85.95 dB); and in medium-scale businesses – circular saw (85.24 dB). As a result of the study, it has been emphasized that long-term noise exposure poses a risk to employees’ hearing health and that preventive measures are therefore mandatory.
- Derleme MakaleYalnız künye2026Activated Carbon Derived from Coal and its Application for Wastewater Treatment
Daulay, Amru; Yassaroh, Yassaroh; Huda, Miftahul; Sumardi, Slamet; Prasetia, Hendra; Kumaş, Cavit; Yusmiati; Lestari, Devi
Coal is used to produce fuels, chemicals, and other high-value-added products to improve efficiency. Activated carbon (AC) derived from coal is an important part of coal’s resource utilization and is high-value-added. This study presents relevant research on AC derived from coal, including raw material selection, preparation methods, modification techniques, and regeneration methods. The potential applications of AC derived from coal for the adsorption of contaminants, including heavy metals, pesticides, pharmaceutical compounds, and organic and inorganic compounds, are reviewed. One of the advantages of using AC derived from coal in wastewater treatment is high adsorption, low cost, and sustainability.
- MakaleAçık Erişim2026Real maritime measurement-driven machine learning for path loss modeling in shore-to-ship wireless links
Sağır, Nuğman; Eyüboğlu, Ekrem; Kuzulugil, Kenan; Tuğcu, Zeynep Hasırcı; Çavdar, İsmail Hakkı
Reliable propagation modeling remains a fundamental requirement for the design and deployment of maritime wireless communication systems, particularly in shore-to-ship scenarios characterized by highly variable environmental conditions. Unlike conventional empirical and deterministic models that rely on theoretical assumptions, the proposed approach is entirely measurement-driven, enabling more accurate and robust propagation modeling. Four regression algorithms—Gaussian Process Regression, Least Squares Boosting, Decision Tree, and Support Vector Regression—are evaluated using a feature set that includes transmission distance, sea state, weather conditions, and antenna configurations. Among the tested models, the Decision Tree achieves the best performance, with an RMSE of 1.18 dB and an R2 of 0.96, corresponding to an error reduction of approximately 45.6% compared to the best-performing empirical model. Feature importance analysis shows that transmission distance and antenna geometry dominate signal attenuation, while environmental variables have a limited influence at this frequency. Unlike most existing studies that emphasize deep learning or black-box models, this work demonstrates that lightweight and interpretable regression models can achieve comparable accuracy while enabling real-time link planning and practical deployment. The focus is on engineering applicability rather than proposing new learning architectures. Overall, the results indicate that measurement-driven machine learning provides accurate and interpretable solutions for shore-to-ship path loss modeling under real maritime conditions.
- Kitap BölümüYalnız künye2026Catalytic Nanocomposites in Oxidative on Adsorptive Delsulfurization Process: A Comprehensive Review
Altuner, Elif Esra; Bozbeyoglu, Pinar; Özkan, Vildan; Ozkan, Abdullah
Humanity's need for energy is an undeniable fact, and this reality is increasing day by day. To meet its growing energy needs, humanity has turned to fossil fuels. Fossil fuels are fuels derived from animal and plant fossils formed over millions of years. However, the excessive use of fossil fuels for energy needs has created a dangerous situation that threatens to deplete fossil fuel reserves. Furthermore, the burning of fossil fuels releases toxic emissions. These emissions cause serious health problems for living organisms and also harm the ecosystem. These gases include sulfate (SO2) and sulfur derivatives, carbon dioxide (CO2), carbon monoxide, and nitrogen oxide derivatives (NOx). This chapter focuses on catalytic techniques using nanocomposite materials for the removal of SO2 and sulfur derivatives, with detailed references to relevant sources. SO2 and sulfur gases are harmful gases released by the combustion of fossil fuels. Nanocomposite production methods include sol- gel formation, gel shaping, chemical vapor deposition (CVD), and physical vapor deposition (PVD), layered production, electrospinning, mechanical and ultrasonic techniques, additive manufacturing, and melting mixture. Desulfurization processes using these methods are as follows: (i) oxidative desulfurization, photocatalytic desulfurization, and absorptive- catalytic desulfurization. All techniques are explained with references to the relevant sources. This chapter provides theoretically important information for researchers working on nanotechnological catalytic studies in desulfurization.
- Kitap BölümüYalnız künye2026Control Tower-Driven Multi-Echelon Inventory Positioning in Pharmaceutical Supply Chains
Şimşek, Ahmet Bahadır; Şimşek, Aybala
Pharmaceutical supply chains face high shortage risk when demand uncertainty interacts with lead-time variability, while shelf-life limits, cold-chain requirements, and quality-release delays raise the cost of both stockouts and excess inventory. This chapter proposes a control tower–driven decision-support framework for multi-echelon inventory positioning that converts visibility into actionable policies. A multi-echelon optimization module generates candidate target-stock and reorder policies across manufacturing and distribution echelons. Monte Carlo–based scenario analysis tests robustness under demand, lead-time, and disruption uncertainty. An MCDA layer then ranks policies using total cost, service level, shortage probability, expediting intensity, days of supply, and recovery time, with sensitivity analysis when weights are uncertain. The framework provides a signal-to-decision map, event-triggered policy updates, and a compact metric dictionary for shortage-risk management without proprietary field data.
- MakaleAçık Erişim2026Does Training Make a Difference? Evaluating a Targeted Child Abuse and Neglect Education Program on Teachers’ Awareness
Türkkan, Tuğba; Odacı, Hatice
This study examined the effect of a psycho-education program on the awareness levels of teachers regarding child abuse and neglect. The study was conducted with teachers working in regions characterized by the presence of at-risk groups. Within the scope of the study, 18 teachers were assigned to the experimental group and 18 teachers to the control group. The experimental group participated in a structured psycho-education program on child abuse and neglect, while no intervention was implemented for the control group. Prior to the intervention, pre-test measurements were conducted using the Child Abuse Awareness Scale for both groups. The psycho-education program consisted of 10 weekly online sessions, each lasting approximately 100–120 min. The findings revealed a significant difference between the pre-test and post-test scores of the experimental group compared with the control group, indicating the effectiveness of the psycho-education program in increasing teachers’ awareness levels. The results suggest that such training programs may play an important role in enhancing teachers’ knowledge and awareness of child abuse and neglect, particularly in recognizing signs of abuse and understanding reporting procedures.
- Derleme MakaleAçık Erişim2026Postbiotics in Dairy: A Comprehensive Review of Applications and Health Impacts
Kaya, Yasemin; Aktaş, Haktan; Meral-Aktaş, Hacer; Ürkek, Bayram; Gürbüz-Kaçan, Zeynep; Çiftçi, Esengül; Erkaya-Kotan, Tuba; Şengül, Mustafa; Çetin, Bülent
Purpose of Review: This review aims to provide a comprehensive overview of postbiotics—defined as non-viable microbial cells, cell components, and microbial metabolites—and their emerging role in dairy products. It focuses on their functional, technological, and health-promoting properties in various dairy matrices, including yoghurt, cheese, kefir, fermented milk, and ice cream. Additionally, the review highlights the potential of postbiotics as stable and safe alternatives to probiotics in the development of functional dairy foods. Recent Findings: Recent evidence demonstrates that postbiotics such as exopolysaccharides (EPS), bacteriocins, short-chain fatty acids (SCFAs), bioactive peptides, and organic acids significantly enhance both the nutritional value and technological quality of dairy products. These compounds have been shown to improve texture, sensory attributes, shelf life, and microbial safety while exerting biological activities, including antimicrobial, antioxidant, immunomodulatory, and gut health–promoting effects. Compared with probiotics, postbiotics offer greater stability during processing and storage as well as reduced safety concerns, particularly for vulnerable populations. Summary: Postbiotics represent a promising strategy for advancing functional and sustainable dairy products by combining health benefits with technological improvements. Their applications in functional food formulation, biopreservation, and bioactive compound delivery are rapidly expanding. However, challenges remain regarding standardised production processes, accurate quantification of bioactive components, and clinical validation of health claims. Future research should focus on optimising postbiotic production and strengthening evidence for their physiological effects to support their broader incorporation into next-generation dairy products.
- MakaleYalnız künye2026In sepsis-associated cardiotoxicity, remifentanil reduces oxidative stress, inflammation, and apoptosis to maintain mitochondrial biogenesis by inhibiting NFkB and cas-3 immunoexpressions and enhancing SIRT1 upregulation
Tepebaşi, Muhammet Yusuf; Aşci, Halil; Selçuk, Esma; Uysal, Dinçer; Bindal, Ahmet; Yüksel, Duygu; Özmen, Özlem
Objective: Sepsis-induced cardiotoxicity (SIC) is a critical complication characterized by inflammation, oxidative stress, and apoptosis, leading to myocardial dysfunction. The short-acting opioid analgesic remifentanil (REMI) possesses antioxidant and anti-inflammatory properties. This study aimed to evaluate the cardioprotective effects of REMI on lipopolysaccharide (LPS)-induced SIC by examining inflammation, oxidative stress, apoptosis, and mitochondrial function. Materials and methods: Thirty-two female Wistar albino rats were divided into four groups: control, lipopolysaccharide (LPS), LPS+REMI, and REMI. Myocardial and aortic tissues were analyzed for histopathology, immunoexpression of Caspase-3 (Cas-3), nuclear factor kappa beta (NF-κB), and tumor necrosis factor alpha (TNF-α). Oxidative stress markers, including total oxidant status (TOS), total antioxidant status (TAS), and oxidative stress index (OSI), were measured. Mitochondrial apoptosis-related gene expression of AMP-activated protein kinase (AMPK), BCL2 Associated X (BAX), B-cell lymphoma 2 (BCL-2), Sirtuin 1 (SIRT1), and Peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC1α) was assessed. Results: LPS administration induced severe histopathological damage, increased oxidative stress (elevated TOS and OSI), and upregulated apoptotic (Cas-3, BAX/BCL-2 imbalance) and inflammatory (NF-κB, TNF-α) markers. REMI treatment significantly alleviated myocardial and aortic injury, reducing the histopathological score. It markedly decreased Cas-3, NF-κB, and TNF-α expression, lowered TOS and OSI levels, and modulated the BAX/BCL-2. Furthermore, REMI restored the expression of AMPK, SIRT1, and PGC-1α genes, indicating a protective effect on mitochondrial biogenesis and energy metabolism. Conclusions: REMI exhibits significant cardioprotective effects in LPS-induced SIC by attenuating inflammation, oxidative stress, and apoptosis while preserving mitochondrial homeostasis.
- MakaleAçık Erişim2026Effects of psychosocial interventions on sexual function, quality of life, and stress in women with gynecologic cancer: a systematic review and meta-analysis
Aydın, Esra; Özcan, Handan; Karakaş, Sevda; Uzun, Sevda
Objectives: To evaluate the effects of psychosocial interventions on sexual function, quality of life, and stress levels in women with gynecologic cancer. Methods: This systematic review and meta-analysis was conducted in accordance with the PRISMA 2020 guidelines. PubMed, Web of Science, EBSCOhost, Google Scholar, and the YÖK Thesis Center were searched between June and July 2024 without year restriction. Randomized controlled and quasi-experimental studies evaluating psychosocial interventions were included. Data were synthesized using meta-analysis and narrative synthesis. Outcomes were synthesized separately for sexual function, quality of life, and stress. Results: Seven studies were included in the analysis. Psychosocial interventions significantly improved sexual function (SMD: 0.868; 95% CI: 0.021 to 1.715; Z = 2.008; p = 0.045; I2 = 89.97%) and quality of life (SMD: 0.709; 95% CI: 0.060 to 1.358; Z = 2.142; p = 0.032; I2 = 88.61%) in women with gynecologic cancer. However, psychosocial interventions did not demonstrate a significant effect on stress levels (SMD: − 1.126; 95% CI: − 2.649 to 0.397; Z = − 1.449; p = 0.147; I2 = 95.65%). Conclusion: This systematic review and meta-analysis indicates that psychosocial interventions are associated with improvements in sexual function and quality of life among women with gynecologic cancer, whereas no statistically significant reduction in stress was observed. Although substantial between-study heterogeneity was present, the overall evidence supports the integration of psychosocial approaches into supportive oncology nursing care.
- MakaleYalnız künye2026Synthesis, antioxidant, and antiurease activities of novel benzimidazole-based 1,3,4-thiadiazole derivatives
Gümrükçüoğlu, Taner İlker; Akgün, Hakan; Bektaş, Hakan; Sökmen, Bahar Bilgin; Menteşe, Emre
In this study, we report the synthesis and characterisation of five new benzimidazole-based 1, 3, 4-thiadiazole derivatives (5a–e) and the evaluation of their antioxidant and antiurease activities. The structures were confirmed by NMR (1H, 13C) and LC/TOF–MS analyses (spectra are given in the supplementary information). Biological assays (DPPH, ABTS, iron-reducing power, urease inhibition) revealed that compound 5e (bearing a 4-nitrophenyl substituent) exhibited the strongest urease inhibition (EC50 = 0.1296 ± 0.0260 µM), surpassing thiourea. One-way ANOVA revealed significant differences in urease inhibition between the compounds (p<0.001). Post-hoc Tukey tests confirmed that compound 5e was more effective than several other compounds. The compounds exhibited moderate and comparable antioxidant activities. The first SAR study shows that electron-withdrawing substituents increase urease inhibition, whereas electron-donating groups increase the reducing power. Comparison with earlier reported triazole analogues shows scaffold-dependent changes in bioactivity. These findings support thiadiazoles as promising dual-function agents for oxidative stress and urease-associated pathologies.
- MakaleYalnız künye2026A reliability generalization meta-analysis of job insecurity scales: Evidence from hospitality and tourism research
Polat, Eray
The study examines the pooled reliability estimates of job insecurity (JI) scales employed in hospitality and tourism (H&T) research. By synthesizing reported reliability coefficients and identifying moderators influencing score consistency, this meta-analytic study consolidates the fragmented psychometric evidence in the field. Reliability coefficients were derived from 140 independent samples comprising 56,265 respondents. Pooled reliability estimates were calculated separately for each scale, and moderator analyses were performed to explain the variability. Findings indicate that De Witte's (2000) scale is the most frequently utilized scale. Pienaar et al.’s (2013) scale yielded the highest estimate (α=.94, 95% CI [.89.,97]), whereas Hellgren and Sverke's (2003) scale demonstrated the lowest (α=.82, 95% CI [.78.,85]). Moderator analyses revealed that scale version, publication year, number of items, sample size, scale mean, and gender distribution significantly influenced reliability estimates. The study provides robust, context-dependent evidence to inform the selection of JI scales.
- BildiriYalnız künye2026Analysis of Temporal Consistency in Video-Based Palmprint ROI Tracking
Sunnetci, Betul Kosmaz; Bingol, Ozkan; Gedikli, Eyup
In real-time palmprint recognition systems, operating under unconstrained conditions, maintaining the defined palmprint region of interest (ROI) throughout hand motion presents a significant challenge. Variations in hand position or orientation may cause the ROI to shift unexpectedly or partially or completely disappear, which can adversely affect subsequent processing steps and their computational cost. In this study, the temporal stability and consistency of palmprint ROIs extracted from video data in the MPW-180 dataset were evaluated using two different approaches. Specifically, the behavior of two methods (optical flow based tracking and keypoint-based MediaPipe Hands detection) was quantitatively analyzed over time using corner position shifts and overlap ratios. Experimental results indicate that although the keypointbased method produces spatially accurate ROI estimates, it may exhibit sudden positional jumps in certain frames. In contrast, the optical flow method provides smoother motion transitions but may introduce positional drift over time due to the accumulation of tracking errors.
- MakaleAçık Erişim2026Biochemical Profiles of Three Bryophytes: Sphagnum papillosum, Rhytidiadelphus triquetrus, and Ditrichum gracile
Okan, Onur Tolga; Baltaci, Cemalettin
This study compared Sphagnum papillosum, Rhytidiadelphus triquetrus, and Ditrichum gracile in terms of total phenolic content (TPC), total flavonoid content (TFC), antioxidant activities (DPPH, ABTS, ferric reducing antioxidant power [FRAP]), phenolic profiles, fatty acid compositions, and mineral contents. S. papillosum had the highest TPC (986.11 mg GAE/kg) and ABTS activity (9732.14 mg Trolox/kg). R. triquetrus showed the highest TFC (874.01 mg QE/kg) and was rich in protocatechuic (18 803 mg/g) and 4-hydroxybenzoic acids (23.219 mg/g). Although D. gracile had lower antioxidant activity, it contained high lipid (6.71%) and ash (27.66%) levels, along with substantial potassium (73 573.86 mg/kg) and calcium (26 135.94 mg/kg) accumulation. Palmitic acid (C16:0) was the dominant fatty acid in all species. These results demonstrate significant biochemical variation among the studied mosses, underlining their potential as sources of natural antioxidants, bioindicators of environmental stress, and candidates for bioremediation.
- MakaleYalnız künye2026Surrogate Trauma in Nurses Providing Pediatric Palliative Care: A Phenomenological Study
Oğuzhan, Hatice; Akay, Gamze; Uzun, Sevda; Koç, Elif Simay; Öncer, Aysun
The aim of this study was to deeply examine the experiences of proxy grief among nurses providing pediatric palliative care. This qualitative phenomenological study was conducted with 16 nurses working in the pediatric ward of a hospital located in the northern region of the country. Data were analyzed using Colaizzi’s phenomenological analysis method. The analysis revealed 3 themes (challenges experienced while caring for children in palliative care; secondary trauma and coping processes; proxy trauma and professional resilience) and 9 sub-themes (emotional strain during care, establishing an empathetic bond, emotional exhaustion, traumatic experiences, seeking psychological support, religious coping methods, developing a professional approach, resilience and acceptance, and motivation to continue in the profession). The study found that nurses providing pediatric palliative care experienced significant psychosocial stress. Pediatric nurses were particularly challenged emotionally when caring for palliative patients. In this context, it is important to develop stress-coping skills to help nurses manage vicarious trauma. Strengthening nurses psychologically and spiritually will positively impact their professional lives, which in turn will enhance the quality of care they provide.
- MakaleYayıncıda açık erişim2026New Records for the Algal Flora of Türkiye from Blanket Bogs of the Eastern Black Sea Region
Akar, Bülent; Avci, Utku
Blanket bogs are ombrotrophic peatlands where water is mainly supplied by precipitation. This study reports new algal records from blanket bogs in Türkiye, contributing to the knowledge of Türkiye’s freshwater algal flora. Algal samples were collected from five different blanket bogs located in the Eastern Black Sea Region of Türkiye. Samples were obtained on a monthly basis during selected months, May, July, and September in 2021, May and September in 2022, and July in 2023. A total of 50 taxa belonging to 19 genera were identified: Scytonema (1), Cavinula (1), Kobayasiella (1), Netrium (4), Closterium (3), Actinotaenium (5), Cosmarium (3), Euastrum (3), Micrasterias (2), Spondylosium (1), Staurastrum (15), Staurodesmus (2), Tetmemorus (2), Microspora (1), Characium (1), Desmodesmus (1), Trachelomonas (2), Calycimonas (1), and Opisthoaulax (1). Calycimonas and Opisthoaulax are reported as new genera for the freshwater algal flora of Türkiye. The identified taxa were predominantly observed in acidic, oligotrophic and low-conductivity waters, thereby indicating the distinctive ecological characteristics and conservation value of alpine blanket peat bogs.
- MakaleAçık Erişim2026Enhancement of bioactive properties and antioxidant activity in wheat chips enriched with purple wheat flour
Yuksel, Ferhat; Kaya, Şemsettin
The objective of this study was to develop wheat chips fortified with purple wheat flour (PWF) and to evaluate the effects of PWF incorporation, frying temperature, and frying time on starch fractions, bioactive properties, antioxidant activity, and acrylamide formation. Response Surface Methodology was applied to assess the effects of PWF concentration (0%–100%), frying temperature (170–190 °C), and frying time (40–60 s) on the quality and functional properties of wheat chips. Resistant starch ranged from 0.51 to 0.80 g/100 g and increased slightly with higher PWF levels; this increase was found to be statistically significant. Acrylamide content was found to be a statistically significant parameter (p < .05), showing a decreasing trend from 1,362.68 to 1,082.76 μg/kg with increasing levels of PWF incorporation. Total phenolic, flavonoid, anthocyanin, and antioxidant activities (2,2-diphenyl-1-picrylhydrazyl (DPPH), free radical scavenging capacity (ABTS)) significantly improved with PWF enrichment, whereas ferric reducing antioxidant power showed no notable change. These findings indicate that PWF can be effectively incorporated into deep-fried wheat chips, enhancing their functional and bioactive properties while reducing acrylamide formation.
- MakaleAçık Erişim2026Between Survival and Sacrifice: Marital Experiences of Patients Undergoing Hemodialysis
Çakmak, Seher; Karataş, Hicran
The study aimed to explore the lived experiences of married dialysis patients on the national organ waiting list, focusing on the interplay between illness, familial roles, and societal norms. This research is a qualitative study using semi-structured interviews and participant observation. The study involved 23 marriage-experienced hemodialysis-dependent patients (13 women, 10 men) on the national organ waiting list, recruited between August 16 and November 11, 2022. Data were collected through interviews and observations and were analyzed thematically to identify recurring patterns. Chronic kidney disease (CKD) poses significant physical, psychological, and social burdens, particularly for hemodialysis-dependent patients. Five main themes emerged from this study: (1) When Care Becomes a Test, (2) Dealing with Social Isolation, (3) Sacrifices to Sustain the Marriage, (4) Uninvited voices, (5) Resentful but Thankful. These findings highlight the need for family-centered care that considers diverse family structures and social contexts, while also demonstrating the impact of prolonged hemodialysis (HD) and marital strain on emotional and sexual intimacy.
- MakaleAçık Erişim2026Microwave-assisted green synthesis of gold nanoparticles using MAE-derived aqueous Rubuscaesius L. Fruit extract: characterization and UV–Vis spectral stability
Serdar, Gönül; Serdaroğlu, Vildan; Keşi̇r, Melek Koç; Kokoç, Memnune; Terzi̇oğlu, Salih
Gold nanoparticles (AuNPs) were synthesized through a microwave-assisted green route using an MAE-derived aqueous Rubus caesius L. fruit extract as a natural reducing and stabilizing medium. The effects of precursor concentration, extract volume, and microwave power were systematically evaluated within the tested experimental range. The combination of 0.075 mM HAuCl₄0.3 H₂O, 0.4 mL fruit extract, and 180 W microwave irradiation produced the most distinct and symmetric surface plasmon resonance response. FT-IR analysis suggested that oxygen-containing functional groups in the extract may have contributed to Au³⁺ reduction and AuNP surface stabilization. TEM analysis revealed spherical, triangular, and hexagonal nanoparticles with an average core size of 11.6 ± 3.2 nm. DLS showed a hydrodynamic diameter of 71.92 ± 4.12 nm and a polydispersity index of 0.425, while the near-neutral zeta potential indicated limited colloidal stability. UV–Vis monitoring showed that the RC-AuNPs largely retained their spectral characteristics for up to 45 days. The synthesized nanoparticles exhibited a core size comparable to previously reported Rubus-mediated AuNPs. The specific contribution of this study is the use of an MAE-derived aqueous R. caesius L. fruit extract together with the systematic evaluation of key synthesis parameters affecting AuNP formation, optical response, and colloidal behavior.
- MakaleAçık Erişim2026Multi-criteria techno-economic evaluation of electric buses with vehicle-integrated photovoltaic for enhanced sustainability
Başoğlu, Mustafa Engin
This study presents a multi-criteria techno-economic evaluation of electric buses (e-buses) equipped with vehicle-integrated photovoltaics (VIPV) to support the global transition toward zero-emission transportation. Aligned with international climate goals like the Paris Agreement and the European Union's 2050 carbon neutrality target, the research assesses ten 12-meter and 18-meter commercial e-bus models from various manufacturers. A computationally efficient methodology is employed, utilizing PVGIS-derived global horizontal irradiation (GHI) data specifically for Gümüşhane, Türkiye. The evaluation framework simultaneously analyzes several critical indicators: PV-based range extension, CO2 emission reduction, grid-connected charging frequency, battery depth of discharge (DoD), and payback period (PP). Findings from the baseline scenario—assuming 50% usable roof area and 22% module efficiency—reveal that e-buses can achieve a daily PV range of up to 19.16 km and annual CO2 emission savings ranging from 1709 to 2596 kg. Additionally, VIPV integration effectively mitigates battery aging by providing a peak DoD reduction of 6.91% and decreases grid-charging dependency by up to 5% during high-irradiance months. In an optimistic scenario featuring 80% usable roof area and 30.1% efficiency, the daily PV range reaches a maximum of 46 km, while the reduction in grid-charging frequency improves significantly to 21.16%. Economic assessments, including Net Present Value (NPV) analysis, confirm the investment's viability, with PPs as short as 3.76 years. This research provides a comprehensive, scalable framework and practical guidance for municipalities and fleet operators to enhance the sustainability of public transport (PT) through solar energy integration.
- MakaleYalnız künye2026The Effect of Parrot Therapy on During Venipuncture Pain in Chronic Patients
Demirağ, Hatice; Tuç, Adile
Objective There are no randomized controlled trial (RCT) in the current literature comparing live, robotic, and visual animal-based therapies. This single-blind randomized controlled trial was conducted to comparatively evaluate the effectiveness of live parrot, robotic parrot, and parrot picture therapies on pain during venipuncture in adults with chronic illness. Methods The study included 240 patients randomized into four groups. Groups interacted with live parrots, robotic parrots, or parrot pictures during venipuncture. The control group received no intervention. Pain levels were assessed before and after the procedure using the "Visual Analog Scale (VAS)." Analysis was performed using Chi-Square test, One-way ANOVA and paired samples t-test. Results There was no difference in pre-procedure pain scores between the groups (p ' .05). After the procedure, the VAS score for the live parrot group was 2.01 ± 1.35, for the robotic parrot group 2.03 ± 1.46, for the parrot picture group 2.08 ± 1.62, and for the control group 4.91 ± 1.88. Again, after the procedure, pain scores in all experimental groups were found to be significantly lower than in the control group (p ' .001). Live parrot therapy was found to be the most effective pet therapy, followed by robotic parrot and parrot picture therapy. The reduction in pain in the live parrot group was statistically more significant than in the picture group. Conclusion The research findings revealed that pet therapy applied during venipuncture, especially live animal interaction, may be a potentially effective, safe, and non-pharmacological method for reducing pain. Robotic animals, on the other hand, can be considered a promising alternative when the use of live animals is not possible. It is recommended that these distraction strategies be considered and integration into routine nursing practices be developed as part of patient-centered care.