Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Dertli, Enes(47)
- Pat, Suat(29)
- Özen, Soner(29)
- Şenay, Volkan(24)
- Korkmaz, Şadan(23)
- Esmer, Yusuf(21)
- Şahin, Engin(21)
- Korkmaz, Özge(20)
- Cuce, Erdem(19)
- Öner, Erdal(18)
- Öztürk, Mesut(18)
- Artar, Musa(17)
- Yilmaz, Mustafa Tahsin(17)
- İspirli, Hümeyra(16)
- Ecem Bayram, Nesrin(15)
- Kaya, Yunus(15)
- Cinar, Mehmet(13)
- Cuce, Pinar Mert(12)
- Kamiloğlu, Aybike(12)
- Kutlu, Naciye(12)
- Mercan, Emin(12)
- Birinci, Ahmet(11)
- Bulut, Mehmet(11)
- Yaylacı, Murat(11)
- Bayram, Ozkan(10)
- Can, Zehra(10)
- Doğan, Zeki(10)
- Kahya, Cem(10)
- Karaali, Rabi(10)
- Pabuçcu, Hakan(10)
- Tosun, Figen Çam(10)
- Özdemir, Akın(10)
- Ayazoglu, Rabil(9)
- Battal, Fetullah(9)
- Bayram, Nesrin Ecem(9)
- Büte, Mustafa(9)
- Ertugrul, Mehmet(9)
- Kadakal, Mahir(9)
- Kaplan, Abdullah(9)
- Sarikaya, İsmail(9)
Yayınlar
- MakaleYalnız künye2026Scopus SJRQ1How to conceptualize the equal sign by middle school students?
Türk, Adem; Öztürk, Mesut
This research examined middle school grade 5–8 students’ conceptualization of the equal sign. The study employed a cross-sectional approach. Eight middle school students studying in official public schools in Turkey participated in the study. The study’s data were collected through a clinical interview that utilized eight open-ended questions, covering topics such as arithmetic, pre-algebra, proportional relationship, and algebra. Thematic analysis was used to analyze the study data. Although previous studies showed that students saw the equal sign as write a result, the results of this research, which is a follow-up study, revealed that students did not think of the equal sign as write a result.
- MakaleYalnız künye2026Scopus SJRQ2Effect of Virtual Reality Glasses on Mild Cognitive Impairment in Older Adults: A Randomized Controlled Trial
Daştan, Buket; Ünal, Hediye
PURPOSE: The current randomized controlled trial evaluated the effect of a virtual reality (VR) glasses intervention on mild cognitive impairment (MCI) in older adults. METHOD: This study was conducted with 24 participants (12 in the intervention group and 12 in the control group) admitted to a neurology outpatient clinic. Participants completed a descriptive information form, the Mini-Mental State Examination, and Montreal Cognitive Assessment. The intervention group watched VR videos 3 days per week for 4 weeks, whereas the control group received no intervention. RESULTS: Participants in the VR intervention group showed improvement in MCI, whereas no significant change was observed in the control group. CONCLUSION: VR interventions may serve as effective tools to enhance cognitive functions in older adults with MCI. Expanding the intervention content and tailoring applications to address specific symptoms may yield more comprehensive results.
- MakaleYayıncıda açık erişim2026Scopus SJRQ2Dual antidepressant-like and antinociceptive effects of Hypericum olympicum extract in mice: preclinical behavioral evidence
Saltan, Nagehan; Üçel, Umut İrfan; Göger, Fatih; Özkay, Ümide Demir; Can, Özgür Devrim
Hypericum Tourn. ex L. species exhibit well-documented neuropsychopharmacological activities, yet the central effects of Hypericum olympicum L. remain unknown. Given the frequent comorbidity of depressive symptoms and pain, this study aimed to characterize, for the first time, the antidepressant-like and antinociceptive profile of H. olympicum in mice. A methanolic extract of the aerial parts (HoE) was prepared, and its major phenolic constituents were identified by LC-MS/MS. At behaviorally active doses, HoE (2.5 and 5 mg/kg, i.p.) did not impair motor coordination in the Rota-rod test, in contrast to diazepam (2 mg/kg, p.o.), indicating the absence of neuromotor confounding effects. In both the tail suspension test (TST) and the modified forced swim test (MFST), HoE significantly reduced immobility, with effects comparable to those of fluoxetine (30 mg/kg, p.o.). In the MFST, increased swimming behavior without changes in climbing suggested a predominantly serotonergic component. HoE also produced marked antinociceptive effects in multiple nociceptive models. It increased response latencies in the hot-plate, tail-immersion, and tail-clip tests, reflecting activity in supraspinal and spinal thermal and mechanical nociceptive processing. In addition, HoE significantly reduced acetic acid-induced writhing, indicating visceral antinociceptive activity. Morphine (10 mg/kg, i.p.) served as the positive control in pain assays. LC-MS/MS analysis indicated the presence of major phenolic constituents, including hyperoside, myricetin derivatives, caffeoylquinic acid derivatives, a luteolin/kaempferol-type glucoside, and a biflavone of the biapigenin/amentoflavone type. These findings suggest that HoE possesses dual antidepressant-like and antinociceptive properties and support its further evaluation for disorders at the affect–pain interface.
- MakaleYalnız künye2026Scopus SJRQ2Experimental investigation on hybrid parabolic trough collector and thermoelectric generator system for energy, economic, and environmental aspects
Cuce, Pinar Mert; Guclu, Tamer; Cuce, Erdem; Bouabidi, Abdallah; El Hadi Attia, Mohammed
This study experimentally investigates the thermal and electrical performance, economic feasibility, and environmental impacts of a hybrid energy system integrated with a parabolic trough collector (PTC) and thermoelectric generator (TEG). In the established system, solar energy is converted into electrical and thermal energy using a steam turbine and TEG. Experimental data indicate that the system operates with an average efficiency of 71.44%, which varies depending on the intensity of solar radiation. The overall energy efficiency of the system is calculated as 14.51%. In the economic analysis, the payback period of the designed system is approximately 5.4 years, while the levelised cost of energy production (LCOE) is calculated to be 0.075 USD kWh−1. The environmental assessment indicates that the system can prevent 356.18 kg of CO2 emissions annually and save approximately 1499.72 L of water. These findings demonstrate that hybrid systems offer an economically and environmentally sustainable and efficient alternative to energy production.
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İncele - MakaleYalnız künye2026Scopus SJRQ2Global boundedness to a chemotaxis system with modified nonlocal and nonlinear reaction
Akkoyunlu, Ebubekir
This paper deals with the following Neumann initial-boundary value problem (Formula presented.) where (Formula presented.) (Formula presented.) is a bounded domain with smooth boundary, (Formula presented.), (Formula presented.), (Formula presented.), (Formula presented.), and (Formula presented.). The initial data satisfy (Formula presented.) where (Formula presented.), (Formula presented.), and (Formula presented.) on (Formula presented.). We rigorously prove that the problem admits a unique global classical solution which is uniformly bounded in time if one of the following conditions holds: (Formula presented.) or (Formula presented.).
- MakaleYalnız künye2026Scopus SJRQ2Hot injection synthesis of metal-doped Ag2S nanocrystals: A novel multifunctional approach for cancer therapy, antibacterial strategies, and antioxidant defense
ULUSU, Funda; OZEL, Sultan Suleyman; Sarilmaz, Adem; ULUSU, Yakup
This pioneering study presents the synthesis and comprehensive evaluation of bare and metal-doped Ag₂S nanocrystals (NCs) as multifunctional agents with potential applications in antibacterial, antioxidant, and anticancer therapies. The incorporation of manganese, nickel, cobalt, and zinc into Ag₂S NCs resulted in a notable enhancement of their bioactivity, representing a novel approach in nanomaterial design. The antibacterial assessments revealed that Mn:Ag₂S NCs were the most potent candidate, exhibiting exceptional activity against S. aureus and E. coli, with the lowest MIC values recorded at 1.28 mg/mL and 1.08 mg/mL, respectively. The antioxidant studies demonstrated that the Mn:Ag₂S NCs exhibited remarkable free radical scavenging and ferric reducing capacities, with the lowest IC50 values (22.69 µg/mL for DPPH and 61.31 µg/mL for FRAP) underscoring their potential to mitigate oxidative stress. Importantly, cytotoxicity assays revealed that Ni:Ag₂S and Mn:Ag₂S nanocrystals selectively inhibited the proliferation of human colon cancer cells (HT-29), achieving IC50 values of 61.51 µg/mL and 90.12 µg/mL, respectively. Furthermore, these NCs demonstrate reduced toxicity towards mouse fibroblast cells (L929). This selective cytotoxicity indicates the potential of these agents in targeted cancer therapies, thereby reducing damage to healthy tissues. To the best of our knowledge, this is the first study to systematically explore the synergistic effects of metal doping on the multifunctional properties of Ag₂S NCs. These findings provide a robust basis for further in vivo studies and offer new avenues for the development of safe and effective nanomaterials in biomedical applications, particularly as antimicrobial, antioxidant, and anticancer agents.
AtıfScopus1WoS1OpenAlex1İncele - MakaleYalnız künye2026Scopus SJRQ3Acute muscle responses according to training level in traditional Turkish archery: an examination of swelling and damage
Kul, Murat; Hazar, Emre Berk
This study aimed to compare acute muscle swelling and echogenicity responses induced by repeated arrow shooting in experienced and amateur traditional Turkish archers, and to examine the influence of training level using ultrasonography. Twenty-four male athletes (12 experienced, 12 amateur) performed 105 arrow shots. Pre- and post-measurements of upper-extremity muscle thickness (MT) and echogenicity were collected. Data were analyzed using repeated-measures analysis of variance (ANOVA) and paired t-tests. Both groups showed significant increases in MT, particularly in experienced archers. Echogenicity increased in several muscles, notably the supraspinatus, brachialis, pronator teres, and brachioradialis. The lack of strong correlation between MT and echogenicity suggests that these parameters reflect distinct acute muscular responses. In conclusion, training level influences acute muscular adaptations to shooting, and certain muscles may require targeted protection to prevent overuse injuries. This study provides the first ultrasonographic evaluation of these responses in traditional Turkish archery.
- MakaleYalnız künye2026Scopus SJRQ2Investigation of magnetic levitation performance in Ag-added DyBa2Cu3O7-δ superconductors fabricated by single-direction melt growth (SDMG) method
Doğruer, M.; Abdioğlu, M.; Motoki, T.; Ozturk, U. Kemal
Abstract This study investigates the magnetic levitation and guidance characteristics of Ag-doped DyBa2Cu3O7-δ superconducting bulks, synthesized by the single-direction melt growth (SDMG) technique. The levitation force, vertical stiffness and lateral guidance force are measured at varying cooling heights (CHs) of 5 mm, 25 mm and 50 mm, with a constant working height (WH) of 5 mm for lateral force measurements. DyBa2Cu3O7-δ samples are cooled using liquid nitrogen (77 K) and thermal stabilization is achieved before force data collection. Results show that levitation forces increase with CH, while the levitation force curves exhibit both attractive and repulsive behavior depending on the CH. The lateral guidance force is higher for the Ag2 sample than for the Ag1 sample and decreased as the temperature decreased. Vertical stiffness also increased with CH and decreased as the levitation gap decreased, confirming heightened guidance forces at smaller distances. The flux density distributions, including both lateral ( B x ) and vertical ( B y ) components, are found to significantly impact the levitation and guidance force performance. Specifically, configurations with concentrated B x gradients improved levitation stability, while configurations with distributed B y led to stronger guidance forces. These findings underscore the importance of optimizing the PMG design to balance B x for levitation and B y for guidance in superconducting systems.
- MakaleYalnız künye2026Scopus SJRQ1Associations between preschool children’s perspective-taking skills and their perceived abilities and behavioral intentions toward peers with special educational needs
Ari-Arat, Ceren; Tutkun, Cansu
The aim of this study was to examine the associations between preschool children’s perceived capabilities, perspective-taking skills, and behavioral intentions toward peers with special educational needs. The sample consisted of 193 preschool children aged 4 to 6 years, selected through convenience sampling from early childhood education centres in Bayburt, Türkiye. A quantitative cross-sectional design was employed. Data were collected using the Child Information Form, the Perceived Capabilities Scale, the Behavioral Intentions Scale, and the Child Perspective-Taking Test. Data collection was conducted in one-on-one sessions over two meetings per child, with an average duration of 18 min. Small but statistically significant positive associations were observed between children’s perceived capabilities and their behavioral intentions across the three peer conditions (r =.283-0.289, p <.01). Small associations were also observed between selected perspective-taking components and behavioral intentions in the bivariate analyses; however, none of the perspective-taking components remained significantly associated with behavioral intentions after the other variables were taken into account. Across the three regression models, perceived capabilities were the only variable that remained significantly associated with behavioral intentions (β = 0.268-0.289, p <.001). The regression models explained a modest proportion of the variance in behavioral intentions (R² = 0.093-0.106; adjusted R² = 0.074-0.087). Exploratory group comparisons indicated selective differences in perspective-taking according to reported experience with peers with SEN; however, these findings should be interpreted cautiously because experience was measured dichotomously and the direct-experience groups were highly unequal. Girls reported slightly higher behavioral intentions toward peers with physical disabilities than boys (t = 2.318, p =.022), whereas no significant age-related differences were observed.
- MakaleYayıncıda açık erişim2026Scopus SJRQ2Metabolic, adipokine (irisin, spexin, visfatin), and ER stress (GRP78) responses in multiparous Brown Swiss cows: a multivariate approach across physiological stages and body condition scores
Kotan, Gökşad Cemil; Aydemir, Şeyma; Bayraktar, Bülent
This study investigated the responses of novel adipokines (irisin, spexin, visfatin), an endoplasmic reticulum (ER) stress marker (GRP78), and traditional metabolic parameters (non-esterified fatty acids (NEFAs), beta-hydroxybutyrate (BHBA), urea, albumin, globulin, total cholesterol) in 360 healthy Brown Swiss dairy cattle. The animals were categorized into 18 subgroups based on pregnancy stages (early, mid, dry), lactation stages (early, mid, late), and body condition scores (BCSs). Serum analyses were performed using ELISA and spectrophotometric methods. Interactions between physiological stages and BCS were highly significant for all measured parameters (p<0.001). Results showed that mean serum levels of spexin (ranging from 14.02 to 36.04 pg mL−1) and irisin increased as pregnancy and lactation progressed. Visfatin levels exhibited a significant increase specifically during the gestation period, peaking during the dry period (24.09 ng mL−1), and maintained a significant increasing trend as lactation progressed toward the late stage (Tables 2, 4). Conversely, GRP78 (peaking at 0.46 ng mL−1), NEFA (peaking at 0.52 mmol L−1), and urea levels peaked during the dry period and early lactation, subsequently decreasing as metabolic stability was achieved. Notably, during the dry period, stress markers rose despite declining albumin and globulin levels (p<0.05). These data indicate that the dry period and early lactation are the most critical phases for metabolic and cellular stress, characterized by lower spexin and elevated GRP78 and NEFA concentrations. The later rise in irisin and visfatin, while BHBA remained within physiological limits, confirms successful metabolic adaptation (p<0.001). In conclusion, the integrated evaluation of these novel biomarkers is anticipated to provide significant contributions to protective strategies and metabolic management in dairy cattle.
- MakaleYalnız künye2026Scopus SJRQ1Effect of ultra-processed food consumption on premenstrual syndrome across different body mass index categories: a cross-sectional analysis
Köktürk, Seda Nur; Taş Yıldırım, Esra; Yardımcı, Hülya
Purpose – This study aimed to examine the association between ultra-processed food (UPF) consumption and premenstrual syndrome (PMS) across different body mass index (BMI) categories in women. Design/methodology/approach – A total of 480 women aged 20–49 years participated in the study between May 2024 and May 2025 in 3 cities in Türkiye. PMS symptoms were assessed using the Premenstrual Syndrome Scale (PMSS), and UPF intake was evaluated according to the NOVA classification using a food frequency questionnaire. Anthropometric measurements, including height and body weight, were taken by researchers, and BMI was calculated for each participant. Findings – The mean BMI of the participants was 24.2 ± 4.9 kg/m2, with an average daily UPF intake of 858.0 ± 133.3 g. Higher UPF intake was significantly associated with increased reporting of PMS, with 7.0% higher odds among normal-weight women, 19.0% higher odds among overweight women, and 41.0% higher odds among women with obesity. Moreover, as UPF consumption increased from the lowest (Q1) to the highest quartile (Q4), the odds of experiencing PMS symptoms were 2.65 times (OR: 2.65, %95 CI: 1.52–4.61), 2.85 times (OR: 2.85, %95 CI:1.60–4.95), and 3.07 times (OR: 3.07, %95 CI: 1.71–5.49) higher, respectively (p = 0.001). Research limitations/implications – These findings underscore a significant association between UPF consumption and PMS symptoms, particularly among women with obesity. Given the high prevalence of PMS and its substantial impact on women's well-being, dietary interventions aimed at reducing UPF intake may represent a promising approach for PMS management and prevention. Originality/value – To the best of our knowledge, this study is the first to examine the relationship between UPF intake and self-reported PMS presence across different BMI categories. 2026
- Kitap BölümüYalnız künye2026The First Stop on the Perceived Taste Journey: Appearance
Nazikgül, Mehmet
- MakaleYalnız künye2026Scopus SJRQ1From spiritual resilience to moral maturity: the role of religious education
Dombak, Kübra; Yayla, İbrahim Erdoğan; çelik, Eyüp
This study examined the mediating role of life in meaning and the moderating effect of religion education on the relationship between spiritual resilience and moral maturity. Data were collected using the Moral Maturity Scale, The Spiritual Resilience Scale and Meaning in Life Scale. The participants consisted of 203 women and 133 men aged 19–63 living in Turkey. Spiritual resilience, moral maturity, life in meaning and religion education were tested in the study using Hayes Process Macro Model 8 moderated mediation. The results revealed that life in meaning mediates the relationship between spiritual resilience and moral maturity. Additionally, the mediating model was found to be stronger among individuals who had received religion education. Furthermore, receiving religion education was found to have a moderating effect on the relationship between spiritual resilience and the presence of the meaning sub-dimension. These findings were discussed in the context of relevant literature.
- MakaleYalnız künye2026Scopus SJRQ1The effect of augmented reality-enriched stories on altruistic sharing behavior
Kotaman, Hüseyin; Balcı, Aslı; Tutkun, Cansu; Bayram, Zeynep
This study aims to determine the effect of reading augmented reality (AR)-enriched stories related to sharing on children’s altruistic sharing behavior. In recent years, AR applications have been increasingly utilized in early childhood education to enhance engagement and motivation; however, there is limited knowledge about their impact on children’s social and moral development. Addressing this gap, the present study focuses on how interactive, immersive storytelling environments can foster prosocial behaviors, particularly altruistic sharing, in preschool children. A total of 300 children aged 4–6 from 21 kindergarten classrooms participated in the study. The classrooms were randomly assigned to one of three groups: a group that received an AR-enriched sharing storybook, a group that received a non-AR digital sharing storybook, and a group that received a digital storybook unrelated to sharing (control group). The sharing behavior of the participating children was measured before and after the story sessions using a standardized sticker-sharing protocol. Each child was read the story individually, according to their assigned group. The difference between children’s post-story and pre-story sharing behaviors was calculated, and the sharing differences among the three groups were compared using ANOVA. As a result, it was found that the children who listened to the AR-enriched story about sharing showed a significantly greater increase in sharing behavior compared to the other two groups. These findings highlight the potential of AR-supported storybooks as effective pedagogical tools for enhancing altruistic and prosocial behaviors in early childhood education.
AtıfScopus2WoS1OpenAlex2İncele - Derleme MakaleYalnız künye2026Scopus SJRQ1The Potential Neuroprotective Role of Biotin in Neurorehabilitation: A Review
Gunay, Esra; Gezmen-Karadag, Makbule
Purpose of Review: Biotin is a water-soluble vitamin that mammals cannot synthesize and must obtain from the diet. Beyond its established role as a cofactor for biotin-dependent carboxylases, biotin has attracted neurological interest because intermediary metabolism, lipid handling, and myelin maintenance are biologically linked. This narrative review examines biotin across three distinct exposure contexts—nutritional adequacy, functional insufficiency, and pharmacological supplementation—and evaluates its putative relevance to neuroprotection and neurorecovery-oriented processes. Recent Findings: Dietary biotin intake is generally sufficient in mixed diets, and overt deficiency is uncommon; however, low diet quality, reduced bioavailability, and methodological limitations in status assessment may complicate interpretation of biotin sufficiency in clinical nutrition. No validated gold-standard biomarker is currently available. Experimental studies suggest that biotin may modulate pathways related to cellular bioenergetics, lipid metabolism, and myelin-associated processes, but these findings are predominantly preclinical and should not be interpreted as direct evidence of clinical efficacy. In progressive multiple sclerosis, high-dose biotin has been evaluated in human studies, including randomized trials, yet clinical results remain inconsistent and laboratory assay interference remains a relevant practical limitation. Summary: Current evidence does not support conflating adequate dietary biotin intake with pharmacological high-dose exposure. Although biotin remains mechanistically plausible in neuroenergetics and myelin-related disorders, its therapeutic relevance to neurorecovery remains uncertain. Better-designed studies are needed to refine exposure assessment, define dose–response relationships, and determine whether mechanistic signals translate into meaningful clinical benefit.
- MakaleYalnız künye2026Scopus SJRQ4Global Economic Policy Uncertainty and Bitcoin: A Transient Nexus
Yıldız, Ümit
Uncertainty plays a significant role in shaping investment decisions, both directly and indirectly. In an uncertain economic environment, investors’ motivations for decision-making may vary. While some investors tend to seek safe-haven assets, others may engage in speculative behavior. Therefore, uncertainty can influence financial instruments through various mechanisms. One of these instruments is Bitcoin, which is often regarded as the “gold” of cryptocurrencies. Compared to traditional financial investment instruments, Bitcoin exhibits higher volatility and is among the primary assets that may be affected by uncertainty. However, an important question is whether this effect is temporary or per-manent. By adopting a frequency-domain causality approach, this study seeks to investigate the causal linkages between Global Economic Policy Uncertainty (GEPU) and Bitcoin price movements. In this context, the causal nexus between GEPU and BTC prices is examined for the entire period and for different frequencies. Although the study's findings show no causal nexus between the variables over the entire period, the analyses for the short, medi-um, and long run indicate a causal relationship from GEPU to BTC in the medium run. Accordingly, GEPU can be considered one of the factors affecting BTC price; however, its impact does not appear to be persistent.
- MakaleYayıncıda açık erişim2026Scopus SJRQ3Effects of phenolic-standardized Crataegus orientalis flower extract on honey bee colony development and seasonal honey yield; [Efectos del extracto floral de Crataegus orientalis estandarizado en compuestos fenólicos sobre el desarrollo de colonias de abejas melíferas y el rendimiento estacional de miel]
Erdoğan, Yaşar; Erdoğan, Ümmügülsüm
Aim of study: The aim of this study was to evaluate the effects of a phenolic-standardized flower extract from Crataegus orientalis Pall. on honey bee colony development and end-of-season honey yield under field conditions, and to assess its lasting colony-level effects. Area of study: The study was conducted during the 2025 beekeeping season at the apiary of Bayburt University Beekeeping Application and Research Center, located in northeastern Türkiye. Material and methods: Twenty-four initially balanced honey bee (Apis mellifera L.) colonies were randomly assigned to four groups (n = 6): a control group receiving 1:1 sucrose:water syrup and three treatment groups receiving 50, 100, or 200 mg GAE L⁻¹ of phenolic-standardized Crataegus orientalis flower extract. Colonies were fed daily for 21 days in early spring and monitored at seven time points (T0–T6) from mid-May to late August. Colony development was assessed using brood area (cm²) and number of frames with bees, while hive-front dead bees were recorded as a safety indicator. Net honey yield was determined at the end of the season. Main results: Daily syrup consumption did not differ among groups (P > 0.05), whereas daily phenolic intake increased in a dose-dependent manner (P < 0.05). Brood area increased significantly with dose and was generally higher in the high-dose group than in the control group throughout the season (P < 0.001). No significant differences were observed among groups for seasonal averages of frames with bees or mortality index; however, a significant treatment × time interaction was detected for frames with bees. Net honey yield was significantly higher in the high-dose group compared to the control group (P < 0.01). Research highlights: Short-term early spring supplementation with phenolic-standardized Crataegus orientalis flower extract supported brood development without increasing adult bee mortality. This early developmental advantage resulted in a measurable improvement in end-of-season honey yield under field conditions.
- MakaleYalnız künye2026Scopus SJRQ1Profile of honey, bee pollen and bee bread: comparative shotgun sequencing
Morgil, Hande; Ecem Bayram, Nesrin
The plant origin of the bee products often influences their value. Here, we investigated for the first time how the content of bee bread, a functional food with high nutritional value, differs in terms of plant and bacterial taxa in comparison with bee pollen and honey samples, using shotgun sequencing analysis. Sequencing of honey, bee pollen, and bee bread samples yielded approximately 32.74 Gbp of data. Out of a total of 268,964 abundant genes, 70,280 genes (26.13%) were assigned to a taxonomic group according to the supermajority rule. These taxonomic groups were annotated as follows: Kingdom (84.99%), phylum (75.94%), class (73.26%), order (67.21%), and family (65.11%). It was determined that honey, bee pollen, and bee bread samples consisted of large plant families Poaceae, Fabaceae and Asteraceae. This indicates that these taxa are also favored by bees for visiting, and are therefore used as food sources. These differences vary according to the environmental flora of the apiary and may be site specific. Based on these results, DNA-based next-generation sequencing techniques can be successfully used to identify the plant sources of bee products. Thus, the botanical and geographical origin of bee product samples can be more accurately, reliably and in detail identified. Furthermore, this technique can be successfully used to monitor the regional flora and food safety.
- MakaleYayıncıda açık erişim2026Scopus SJRQ1Surface modification and tribological performance of AISI 4140 steel via shot peening and plasma nitriding: A systematic evaluation of conventional, repeated and severe plastic deformation
Erdoğan, Ömer; Kovacı, Halim
Despite its widespread industrial use, AISI 4140 steel exhibits limited resistance to wear and surface damage. This study investigates the effects of vibratory shot peening and plasma nitriding processes, applied individually and in combination, on the tribological performance of AISI 4140 steel. Shot peening was performed under conventional (CSP), re-shot peening (RSP) and severe shot peening (SSP) conditions, while plasma nitriding was carried out at temperatures of 460 °C and 535 °C. The severe plastic deformation created by shot peening increased dislocation density, significantly improving nitrogen diffusion during plasma nitriding. The SSP condition resulted in the highest surface hardness, increasing from 248 HV0.1 to 533 HV0.1, while the combined SSP and plasma nitriding treatment produced a maximum hardness of 920 HV0.1. In dry wear tests, the combined application of shot peening and plasma nitriding significantly reduced the wear rate, achieving a reduction of approximately 94% compared to the untreated sample. In saltwater environments, wear behaviour was controlled by the continuity of the nitride layer and the diffusion depth, resulting in an 82% reduction in wear rate for the SSP and plasma nitriding condition. Overall, it has been observed that applying vibratory shot peening prior to plasma nitriding significantly improves the tribological performance of AISI 4140 steel.
- MakaleYalnız künye2026Scopus SJRQ2Boundedness in a parabolic-elliptic chemotaxis system with logistic source involving the exponents depending on the spatial variables and nonlinear signal productions
Ayazoglu, Rabil; Simsek, Ramazan
This paper considers the global boundedness of solutions to the parabolic-elliptic chemotaxis system with a logistic source involving exponents that depend on spatial variables and nonlinear signal production: (Formula presented.) where (Formula presented.), μ, (Formula presented.), and (Formula presented.) is a measurable function, subject to the homogeneous Neumann boundary conditions in a bounded domain (Formula presented.) with smooth boundary. We prove that if either (Formula presented.), (Formula presented.) or (Formula presented.) with (Formula presented.) or (Formula presented.) with (Formula presented.), (Formula presented.) or (Formula presented.), then the above system possesses a unique global bounded classical solution.
AtıfScopus1WoS1OpenAlex1İncele
