Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Dertli, Enes(117)
- Kaya, Yunus(51)
- Şahin, Engin(48)
- İspirli, Hümeyra(47)
- Özen, Soner(46)
- Şenay, Volkan(45)
- Pat, Suat(44)
- Can, Zehra(39)
- Bayraktar, Bülent(37)
- Bayram, Sinan(37)
- Korkmaz, Şadan(36)
- Cuce, Erdem(35)
- Ecem Bayram, Nesrin(33)
- Kutlu, Naciye(33)
- Yilmaz, Mustafa Tahsin(32)
- Artar, Musa(31)
- Ertugrul, Mehmet(30)
- Öner, Erdal(30)
- Ayata, Ümit(29)
- Hasar, Ugur Cem(29)
- Esmer, Yusuf(28)
- Mercan, Emin(27)
- Cuce, Pinar Mert(26)
- Özdemir, Akın(25)
- Çolak, Murat(24)
- Bayram, Ozkan(23)
- Kamiloğlu, Aybike(23)
- Sert, Durmuş(22)
- Ayazoglu, Rabil(21)
- Abdioglu, Murat(20)
- Bayram, Nesrin Ecem(20)
- Kadakal, Mahir(20)
- Kara, Yakup(20)
- Kizil, Hamit Emre(20)
- Tozlu, Alperen(20)
- Birinci, Ahmet(19)
- Gerçek, Yusuf Can(19)
- Battal, Fetullah(18)
- Dirican, Ebubekir(18)
- Ergün, Mustafa(18)
Yayınlar
- MakaleAçık Erişim2024Scopus SJRQ1Validity and reliability of the Turkish version of the transition of primiparas becoming mothers scale
Kirbaş, Zila Özlem; Odabaşi Aktaş, Elif; Özkan, Hava
Background: The transition to motherhood is an important life event in a woman’s life and represents an important developmental process that brings physical, psychological and social changes to gain a new role. However, research on the transition to motherhood in Turkish society is scarce. There is a need for a comprehensive, practical and reliable tool to evaluate the transition to motherhood in primiparous mothers. This study evaluated the reliability and validity of the Turkish version of the Transition of Primiparous Becoming Mothers Scale (TMP-S) to evaluate the transition process of primiparous mothers to motherhood. Methods: This methodological research was carried out in obstetrics and gynecology outpatient clinics, pediatric outpatient clinics, and family health centers of a hospital in Türkiye. The sample consisted of primiparous mothers of 0 to 6- month-old babies who visited clinics and family health centers for routine postnatal examinations (n = 305). After evaluating the language equivalence and content validity of the scale, test-retest reliability, internal consistency and construct validity were examined. Factor analysis, Pearson’s correlation, retest reliability, and Cronbach’s alpha were employed to evaluate structural validity and reliability. Results: The final TPM-S had two dimensions with 25 items. Exploratory factor analysis revealed a two-factor solution, which accounted for 59.276% of the variance. Confirmatory factor analysis showed that the model fit of the two-factor model also reached a satisfactory model ft after modification. The comparative fit index was 0.894, the Tucker‒Lewis index was 0.882, and the root mean square error of approximation was 0.079. The content validity index of the scale ranged from 0.56 ~ 0.77. The Cronbach’s alpha coefficient was 0.93 for the total scale, and the test–retest reliability was 0.96. Conclusions: It is a valid and reliable tool for evaluating the transition to motherhood among primiparous mothers of 0 to 6 month-old babies in Türkiye. Turkish researchers and healthcare professionals can routinely apply this measurement tool to primiparous mothers in the first six months after birth to evaluate their transition to motherhood.
AtıfScopus1
İncele - MakaleYalnız künye2024Scopus SJRQ2Optimization of ultrasonic-assisted osmotic dehydration as a pretreatment for microwave drying of beetroot (Beta vulgaris)
Memis, Habibe; Bekar, Fevzi; Guler, Cagri; Kamiloğlu, Aybike; Kutlu, Naciye
The aim of this study was to optimize drying conditions during ultrasonic-assisted osmotic dehydration and subsequent microwave drying of red beetroot using the Box-Behnken design. For this purpose, ultrasonic-assisted osmotic dehydration was performed at different ultrasonic powers (50, 75, and 100 W), sonication times (20, 40, and 60 min), and salt concentrations (0%, 15%, and 30%). The subsequent drying procedures were conducted with 231, 518, and 805 W microwave power. The best condition was selected as 5.15% salt concentration, 20 min sonication time, 50 W ultrasonic power, and 716.45 W microwave power. The responses obtained under optimum conditions were determined as 68.06%, 9.54 mg GAE/g dm, 28.23, 42.66, and 3.08 for DPPH• % inhibition, total phenolic content, L*, a*, and b* values, respectively. While favorable impacts on color were detected for the applied pretreatments, the DPPH• scavenging activities of the dried beetroot were determined to be more significant after ultrasonic-assisted osmotic dehydration. Furthermore, the drying kinetics of beetroot were evaluated according to the Midilli et al. model. When the fit to the model was investigated, it was compatible at R2> 0.90 level. As a result, the ultrasonic-assisted osmotic dehydration pretreatment performed before the microwave drying method preserved the quality characteristics of beetroot samples and was successfully applied.
AtıfScopus12WoS11OpenAlex11İncele - MakaleYayıncıda açık erişim2024Scopus SJRQ1DYNAMICS IN A PARABOLIC-ELLIPTIC CHEMOTAXIS SYSTEM WITH LOGISTIC SOURCE INVOLVING EXPONENTS DEPENDING ON THE SPATIAL VARIABLES
Ayazoglu, Rabil; Kadakal, Mahir; Akkoyunlu, Ebubekir
We consider the parabolic-elliptic chemotaxis system with the exponents depending on the spatial variables logistic source and nonlinear signal production: ut = ∆u−χ∇·(u∇υ)+f(x, u), (x, t) ∈ Ω×(0, T), 0 = ∆υ−υ+uγ in a bounded domain Ω ⊂ RN (N ≥ 1) with smooth boundary, subject to nonnegative initial data and homogeneous Neumann boundary conditions, where χ > 0, γ ≥ 1 and ∂ν∂ denotes the outward normal derivative on ∂Ω. The logistic function f fulfilling f(x, s) ≤ ηs− µsα(x)+1, η ≥ 0, µ > 0 for all s > 0 with f(x, 0) ≥ 0 ∀x ∈ Ω, where α : Ω → [1, ∞) is a measurable function. It is proved that if 1 ≤ α(x) < ∞ for all x ∈ Ω such that essinfx∈Ω α(x) > γ or essinfx∈Ω α(x) = γ with µ > χ, then there exists a nonnegative classical solution (u, υ) that is global-in-time and bounded. In addition, under the particular conditions γ = 1 and f(x, s) = µ(s − sα(x)+1), if µ is sufficiently large, the global bounded solution (u, υ) satisfies ∥u(·, t) − 1∥L∞(Ω) + ∥υ (·, t) − 1∥L∞(Ω) ≤ Ce− Nk+2 t for all t > 0 with k = min n χ42 12o , C > 0. The global-in-time existence and uniform-in-time boundedness of solutions are established under specific parameter conditions, which improves the known results.
AtıfScopus11WoS9OpenAlex11İncele - MakaleAçık Erişim2024Scopus SJRQ3THE EFFECT OF DIFFERENT STORAGE DURATION PERIODS AFTER HARVESTING IN A SEMI-ARID ENVIRONMENT ON THE QUALITY COMPONENTS IN SUGAR BEET
Yildiz, Umut; Ozturk, Erdogan; Sefaoglu, Firat; Gul, Volkan; Toktay, Zehra
The storage of the harvested sugar beet (Beta vulgaris L.) before the processing stage is crucial, particularly regarding quality and durability. To maintain the quality of the beet prior to processing, appropriate storage conditions must be provided. Although siloing is a standard method for beet storage, this process may have some negative effects. Given the limited information on the impact of siloing on yield and quality, it is essential to determine the optimal duration of siloing. This study investigated the effect of different siloing periods on the root and weight and quality criteria of sugar beet in 2020 and 2021. Four siloing periods (immediately after harvest, ten days after harvest, 20 days after harvest, and 30 days after harvest) were analyzed. The siloing periods significantly affected both the root weight and quality criteria in both years of research. It was determined that the examined characteristics were significantly influenced by the treatments, with weight loss, dry matter content, sugar content, and sugar yield of roots increasing with the length of the siloing period. The results highlight the importance of the waiting time during the siloing period for sugar beet stored in silos after harvest. To minimize losses in the examined characteristics, it is recommended that the processing occur immediately after harvest. If it must be delayed processing is recommended between 10-20 days post-harvest.
AtıfScopus1WoS1OpenAlex1İncele - MakaleYayıncıda açık erişim2024Scopus SJRQ1Energy, exergy, environmental, and enviroeconomic (4E) analysis of cascade vapor compression refrigeration systems using nanorefrigerants
Yılmaz, Metin; Cimşit, Canan; Keven, Arzu; Karaali, Rabi
The refrigerants used in traditional vapor compression refrigeration systems are harmful to the ozone layer and contribute to global warming. The demand for refrigeration is increasing because of global warming. In this study, for the first time, an energy, exergy, environmental, and enviroeconomic (4E) analysis was performed using different refrigerants and nanoparticles to reduce the energy required in low-temperature vapor compression cascade refrigeration systems and to determine more environmentally friendly nanorefrigerants. The R290 refrigerant was used for the Low-Temperature Circuit (LTC), while the High-Temperature Circuit (HTC) used RE170, R1234yf, R600, R600a, and R450A refrigerants. The nanoparticles used in the analysis were Al2O3, CNT, CuO, TiO2, ZnO, and SiO2. The R600 nanorefrigerant performed the best, whereas the R1234yf nanorefrigerant performed the worst. The results indicate that the CuO nanoparticles provided the highest performance. In addition, the results showed that the R290+R600-CuO nanorefrigerant emitted 11 % less CO2 than the pure R290+R600 refrigerant. The nanorefrigerants provide a more environmentally sustainable option because of their high efficiency and lower energy consumption than conventional refrigerants.
AtıfScopus9WoS7OpenAlex8İncele - MakaleAçık Erişim2024Scopus SJRQ3Green Synthesis of Selenium Nanoparticles using Green Coffee Beans: An Optimization Study
Baluken, Pınar; Kamiloglu, Aybike; Kutlu, Naciye
In this study, ultrasonication extraction of some bioactive compounds from green coffee beans was optimized with the response surface method using Box-Behnken experimental design. The best condition was selected as 90.90 W ultrasonic power, 33.63 min sonication time and 30 % solid concentration. The responses obtained under optimum conditions had TPC, DPPH and CUPRAC values identified as 6603.33±2025.94 ppm GAE, 9638.31±372.17 ppm TE and 98.83 mmol, respectively. Microwave-assisted selenium nanoparticle production was carried out using the extract obtained under optimized conditions. The produced selenium nanoparticles showed absorbance between 350–400 nm. The surface morphology and size of the nanoparticles were determined by transmission electron microscopy (TEM) and spherical nanoparticles of about 100 nm were produced. Functional groups affecting the reduction were determined by FTIR analysis. In addition, the produced selenium nanoparticles had amorphous (non-uniform) structure and could maintain their stability at high temperatures.
AtıfScopus5WoS5OpenAlex5İncele - MakaleYayıncıda açık erişim2024Scopus SJRQ1The effect of bed exercises following major abdominal surgery on early ambulation, mobilization, pain and anxiety: A randomized-controlled trial
Simsek Yaban, Zuleyha; Bulbuloglu, Semra; Kapikiran, Gurkan; Gunes, Huseyin; Kula Sahin, Sennur; Saritas, Serdar
This randomized-controlled trial aimed to investigate the effect of bed exercises on postoperative anxiety, pain, early ambulation and mobilization. This study was conducted with a randomized-controlled trial design and in the general surgical clinic of a research and training hospital. A total of 120 patients (60 in the experimental group and 60 in the control group) scheduled for major abdominal surgery took part in the study. The data were collected using a patient information form, the Anxiety Specific to Surgery Questionnaire and the Visual Analog Scale through face-to-face interviews. The patients in the experimental group performed 15-min bed exercises on the day of their operation, as well as on the postoperative first and second days, and the control group underwent only the routinely performed procedures in the clinic. The data were analysed using descriptive statistics, analysis of variance and t-tests. The sample of our study included major abdominal surgery patients. Ambulation was achieved at a mean time of 4 h earlier in the experimental group. On the postoperative first and second days, the patients in the experimental group had mean mobilization durations that were approximately 2 h longer compared with the patients in the control group. Moreover, the postoperative pain and anxiety levels of the patients in the experimental group were significantly lower than those of the patients in the control group (p < 0.05). We recommend that bed exercises be performed to lower anxiety and pain severity, achieve early ambulation and increase the duration of mobilization among patients following major abdominal surgery.
AtıfScopus7WoS8OpenAlex9İncele - MakaleAçık Erişim2024Scopus SJRQ1The Roles of Personality Traits, AI Anxiety, and Demographic Factors in Attitudes toward Artificial Intelligence
Kaya, Feridun; Aydin, Fatih; Schepman, Astrid; Rodway, Paul; Yetişensoy, Okan; Demir Kaya, Meva
The present study adapted the General Attitudes toward Artificial Intelligence Scale (GAAIS) to Turkish and investigated the impact of personality traits, artificial intelligence anxiety, and demographics on attitudes toward artificial intelligence. The sample consisted of 259 female (74%) and 91 male (26%) individuals aged between 18 and 51 (Mean = 24.23). Measures taken were demographics, the Ten-Item Personality Inventory, the Artificial Intelligence Anxiety Scale, and the General Attitudes toward Artificial Intelligence Scale. The Turkish GAAIS had good validity and reliability. Hierarchical Multiple Linear Regression Analyses showed that positive attitudes toward artificial intelligence were significantly predicted by the level of computer use (β = 0.139, p = 0.013), level of knowledge about artificial intelligence (β = 0.119, p = 0.029), and AI learning anxiety (β = −0.172, p = 0.004). Negative attitudes toward artificial intelligence were significantly predicted by agreeableness (β = 0.120, p = 0.019), AI configuration anxiety (β = −0.379, p < 0.001), and AI learning anxiety (β = −0.211, p < 0.001). Personality traits, AI anxiety, and demographics play important roles in attitudes toward AI. Results are discussed in light of the previous research and theoretical explanations.
AtıfScopus548WoS500OpenAlex688İncele - MakaleYalnız künye2024Scopus SJRQ3Capacity-spectrum push-over analysis of rock-lining interaction model for seismic evaluation of tunnels
Majidian, Sina; Tapkın, Serkan; Tercan, Emre
Evaluation of tunnel performance in seismic-prone areas demands efficient means of estimating performance at different hazard levels. The present study introduces an innovative push-over analysis approach which employs the standard earthquake spectrum to simulate the performance of a tunnel. The numerical simulation has taken into account the lining and surrounding rock to calculate the rock-tunnel interaction subjected to a static push-over displacement regime. Elastic perfectly plastic models for the lining and hardening strain rock medium were used to portray the development of plastic hinges, nonlinear deformation, and performance of the tunnel structure. Separately using a computational algorithm, the non-linear response spectrum was approximated from the average shear strain of the rock model. A NATM tunnel in Turkey was chosen for parametric study. A seismic performance curve and two performance thresholds are introduced that are based on the proposed nonlinear seismic static loading approach and the formation of plastic hinges. The tunnel model was also subjected to a harmonic excitation with a smooth response spectrum and different amplitudes in the fully-dynamic phase to assess the accuracy of the approach. The parametric study investigated the effects of the lining stiffness and capacity and soil stiffness on the seismic performance of the tunnel.
AtıfScopus1WoS1OpenAlex1İncele - MakaleAçık Erişim2024Scopus SJRQ3Construction of a new generalization for n-polynomial convexity with their certain inequalities
Kadakal, Mahir; İşcan, İmdat; Kadakal, Huriye
In this paper, we first construct a new generalization of n-polynomial convex function. That is, this study is a generalization of the definition of "n-polynomial convexity" pre-viously found in the literature. By making use of this construction, we derive certain inequalities for this new generalization and show that the first derivative in absolute value corresponds to a new class of n-polynomial convexity. Also, we see that the obtained results in the paper while comparing with Hölder, Hölder-İşcan and power-mean, improved-power-mean integral inequalities show that the results give a better approach than the others. Finally, we conclude our paper with applications containing some means.
AtıfScopus7WoS7OpenAlex7TR Dizin1
İncele - MakaleAçık Erişim2024Scopus SJRQ3Investigation of Hot Press and Cold Press Effects on Structural, Electrical and Magnetic Properties of Pyrene Added Bulk MgB2
Erdem, O.
In this paper, the effects of hot pressing and cold pressing on the superconducting properties of pyrene (C16H10) added bulk MgB2 were compared. For this aim, the polycrystalline disk-shaped MgB2 samples with addition of 4 wt % C16H10 powder were fabricated by a pellet/closed tube method at 850 °C, after hot pressing at 200 °C and cold pressing. The XRD and SEM results showed that although a-lattice parameters reduce for both C16H10 added samples, the average crystallite size increases after cold pressing because of the accumulation and inhomogeneous distribution of C in the MgB2 structure while it reduces for the C16H10 added hot pressed sample. The resistivity measurements showed that the increment of electron scattering is higher for the C16H10 added cold pressed sample than that of the C16H10 added hot pressed one which shows relatively better grain connectivity, and the Tc values of the samples are not appreciably affected by the pressing conditions. From the magnetisation measurements the in-field Jc values at 10 K and 5.5 T were obtained as 8.41 × 103 A/cm2, 1.62 × 104 A/cm2, 6.90 × 103 A/cm2 and the Hirr values while Jc = 100 A/cm2 at 20 K were obtained as 5.99 T, 6.55 T and 6.19 T for the pure sample and the C16H10 added hot and cold pressed samples, respectively. The higher Jc and Hirr values obtained for the C16H10 added hot pressed sample is because of the homogenous C substitution into MgB2 grains, as compatible with its lower Δρ value, and thus increased flux pinning ability.
- MakaleAçık Erişim2024Scopus SJRQ1Analysis of optical, structural, and morphological properties of a Ti-doped α-Fe2O3 thin film produced through RF and DC magnetron Co-sputtering
Abdolahpour Salari, Maryam; Merhan Muğlu, Günay; Şenay, Volkan; Sarıtaş, Sevda; Kundakçı, Mutlu
In this study, a Titanium (Ti) doped α-Fe2O3 (hematite) thin layer was synthesized onto a glass substrate, employing the simultaneous DC and RF magnetron sputtering method. The investigation focused on examining specific physical properties of the film. The optical, structural, morphological, and elemental features of the resulting Ti-doped α-Fe2O3 thin film were characterized using different characterization techniques. The XRD studies indicated a rhombohedral crystal structure in the studied thin film. The calculation of the Eg value for the thin film, based on absorption measurements, resulted in a value of 2.19 eV. Raman peaks were identified within the range of 218 cm−1 to 1300 cm−1. According to SEM images, the thin film exhibited a uniform surface morphology across the substrate. AFM images revealed a low root mean square (RMS) roughness value, indicating a smooth Ti:Fe2O3 thin film surface.
AtıfScopus24WoS25OpenAlex29İncele - MakaleYalnız künye2024Scopus SJRQ1The effect of nurse-led motivational interviewing based on the trans-theoretical model on promoting physical activity in healthy older adults: A randomized controlled trial
Sönmez Sari, Ebru; Kitiş, Yeter
Aim: The aim of this study was to evaluate the effect of motivational interviewing based on the trans-theoretical model promoting physical activity in older adults. Methods: A randomized controlled trial study was conducted with 117 older adults (intervention group: 58, and control group: 59) between April and November 2019. The data were collected via a questionnaire, trans-theoretical model scales, the Physical Activity Scale for the Elderly, the Katz Activities of Daily Living scale and a pedometer. The 24-week intervention consisted of regular motivational interviewing. The control group received usual care at the family health centre. Results: Following the intervention, the Intervention Group showed significant improvements Exercise Processes of Change Scale, Exercise Self-Efficacy Scale and Perceived Benefits of the Decisional Balance Scale for Exercise. There was a significant difference between the groups in terms of stages of change. In the Intervention Group, 81.5% were in the contemplation stage in the pre-test, while in the post-test, 70.4% had transitioned to the action stage. In contrast, in the control group, 62.5% were in the contemplation stage initially, but in the post-test, only 9.3% had reached the action stage. The mean number of step counts increased significantly in favour of the Intervention Group, as did the Physical Activity Scale for the Elderly total score. Conclusion: The trial indicated that after the trans-theoretical model-based motivational interviewing, the stages of change among the older adults improved, as did their exercise behaviours. It is recommended that the trans-theoretical model and motivational interviewing be used by nurses to improve healthy lifestyle stage behaviours in older adults.
AtıfScopus14WoS12OpenAlex12İncele - MakaleAçık Erişim2024Scopus SJRQ2An optimization study for amino acid extraction from bee bread using choline chloride-acetic acid deep eutectic solvent and determination of individual phenolic profile
Kutlu, Naciye; Gerçek, Yusuf Can; Çelik, Saffet; Bayram, Sinan; Ecem Bayram, Nesrin
In this study, the aim was to optimize the extraction conditions (molar ratio, time, temperature) in order to maximize the total individual amino acid (TAA) yield from bee bread, which is a fermented bee product, using choline chloride-acetic acid deep eutectic solvent (DES). In addition to the phenolic profile and amino acid profile investigated by LC-MS/MS, some spectrophotometric (total phenolic content, total flavonoid content, total proanthocyanidin content) and bioactivity (antioxidant/antimicrobial activity) tests were carried out on the extracts. Optimum conditions were determined as 1:2 for molar ratio, 15 min for time and 10 °C for temperature with optimization based on the TAA values of the different extracts (d: 0.99). Molar ratio and temperature were found to have statistically significant effects on TAA values. At optimum conditions, the amount of TAA obtained with DES (29.678 g/kg) was found to be approximately 35.2% and 54.4% higher than that obtained with ethanol and methanol extracts, respectively. All these results indicate that choline chloride-acetic acid DES can be chosen when preparing bee bread extracts, which are evaluated for different areas of use such as food and health due to active ingredient content. Higher active ingredients can be extracted by trying different DES combinations.
AtıfScopus7WoS9OpenAlex11İncele - MakaleAçık Erişim2024Scopus SJRQ1An Investigation of Rater Effects on L2 Translation Performance Scores
Aybirdi, Nilufer; Han, Turgay
This study examines the impact of L2 translation quality and rating experience on raters’ scoring behaviours and the reliability and variability of scores. It also investigates frequently used decision-making strategies applied by raters assigning scores to different qualities of translation papers produced by Turkish EFL students. In total, 80 translation papers (40 low-quality and 40 high-quality) obtained from the participants were given to 10 raters to score using a translation scoring rubric. Results revealed that less experienced raters were more positive while scoring the students’ translation performances and assigned higher and more consistent scores to the papers.
- MakaleYalnız künye2024Scopus SJRQ1A Novel Fuzzy Cumulative Sum Control Chart with an α-Level Cut Based on Trapezoidal Fuzzy Numbers for a Real Case Application
Özdemir, Akın; Uçurum, Metin; Serencam, Hüseyin
Statistical process control (SPC) is widely used to monitor production processes in many industries under certain conditions. When dealing with a quality characteristic for uncertainty, fuzzy numbers are used in the context of the statistical process control (SPC) to monitor a fuzzy production process. The aim of this paper is fourfold. One, a fuzzy X¯-R control chart with an α-level cut is used based on trapezoidal fuzzy numbers (TFNs) for detecting the large shifts in the fuzzy process mean. Second, a fuzzy cumulative sum (FCUSUM) control with an α-level cut based on TFNs is firstly developed for detecting the small shifts in the fuzzy process mean. Third, the fuzzy process capability indices (FPCIs) are presented to measure the fuzzy process performance. Finally, an ultra-fine calcite production process is controlled with both the fuzzy X¯-R control chart and the proposed FCUSUM control chart. The results of the fuzzy X¯-R control charts show that the fuzzy production process is in control, and large shifts in the fuzzy process mean were detected. On the other hand, the results of the FCUSUM charts show that the fuzzy production process is out of control, and small shifts in the fuzzy process mean were detected. FPCIs are also conducted, and the results of fuzzy Cpk indices show that the ultra-fine calcite production process is not capable of meeting specification limits.
AtıfScopus7WoS9OpenAlex9İncele - MakaleAçık Erişim2024Scopus SJRQ3InvestIgatIon of cytotoxIcIty and antIbacterIal effect of boron-contaInIng nano-hydroxyapatIte
Aydın, Numan; Karaoğlanoğlu, Serpil; Süloğlu, Aysun Kılıç; İdil, Neslihan; Demir, Merve; Karakaş, İbrahim Hakkı
Introduction: Different regenerative materials are used to protect and stimulate pulp tissue. Objectives: This in vitro study aimed to examine the cytotoxicity of different doses of boron-containing nano-hydroxyapatite (B-nHAp) and its antibacterial effect. Material and methods: B-nHAp was synthesized with microwave-assisted chemical precipitation method at different rates, such as 1%, 5%, and 10%. The extracts were prepared in separate tubes: 1%, 5%, 10% B-nHAp, and nHAp 50 mg/ml. Cytotoxicity test was performed on L929 mouse fibroblasts for 24 and 72 hours. Antibacterial analysis was performed with Streptococcus mutans bacteria using micro-dilution method. Cell viability values were evaluated with two-way analysis of variance (ANOVA) test (p < 0.05). Results: B-nHAp was successfully synthesized in XRD and SEM analyses. Nano-hydroxyapatite showed more cell viability than control group at 24 and 72 hours. All B-nHAp extracts demonstrated less cell viability at the end of 24 hrs. than control group. However, 1% B-nHAp cell viability decreased more in the B-nHAp group compared with the control group, while 5% and 10% B-nHAp showed high cell viability after 72 hours of incubation. B-nHAp demonstrated less antibacterial effect on Streptococcus mutans compared with nHAp. Conclusions: According to the results, the addition of boron to nano-hydroxyapatite does not make a significant contribution to increase the regenerative and antibacterial properties of the material.
AtıfScopus4OpenAlex5İncele - MakaleAçık Erişim2024Scopus SJRQ1An investigation of cyberloafing behaviors in learners of Turkish as a foreign language
Güngör, Haluk; Ustabulut, Mete Yusuf
Cyberloafing can be defined as using technological devices for extracurricular activities during the lesson. The misuse of technological tools and facilities in educational environments causes many learning problems. One of the most important behaviors that cause this problem is cyberloafing. The explorative and main aim of the current study is to examine the reasons behind the cyberloafing behaviors of those who learn Turkish as a foreign language in terms of various variables and explore the phenomenological point of view of participants. The research was carried out in accordance with the convergent parallel mixed method design. The “Cyberloafing Behaviors Scale” was employed to collect quantitative data from a total of 207 students learning Turkish in 5 different TÖMER (Teaching Turkish Center); in the process of qualitative data collection, open-ended questions formed by the researcher were used. For examining mean differences in terms of categorical variables t-test and separate ANOVAs were run. In ANOVAs, in order to minimize the possibility of error that may occur in the ANOVA test, type I error was controlled with Bonferroni correction. To determine predictors of cyberloafing behaviors of the study group multiple regression analysis was utilized. According to the findings of the current study, there was no significant difference between gender and time spent on social media and cyberloafing behavior; in the real-time updating dimension, it was determined that there was a significant difference between the B1 level and B2 and C1 levels. Having devices such as laptops stands out as the variable that predicts cyberloafing the most. It was also observed that cyberloafing behavior decreased as speaking skill increased. When the qualitative data was examined, the students stated that they were cyberloafing due to reasons such as messaging, sharing photos and videos because of boring lessons.
AtıfScopus3WoS4OpenAlex4İncele - MakaleAçık Erişim2024Scopus SJRQ3Organizational Overview of Maslow and Management Research
Durmuş, İbrahim
Maslow's theory of motivation or hierarchy of needs; has been the subject of much research on a global scale in the physiological, psychological, and sociological framework. This situation, especially in terms of organizations (public or private), concerns both the employees and the management mechanism. Maslow and management generally reveal the theoretical and relational results in the policies applied in organizations. In the literature, studies in which studies carried out in Maslow and management research are systematically expressed quite limited. The research was carried out using the R program and bibliometric analysis applications with the help of the WoS database on Maslow and management research. As a result of the research analysis, the most emphasized keywords by the authors; motivation, Maslow, Maslow's hierarchy of needs, needs hierarchy, needs, management, self-actualization, leadership, psychology, innovation, sustainability, job satisfaction, China, satisfaction, commitment, human psychology, human needs, Covid-19, management theory, personality division, hierarchy, Maslow's theory, performance, spirituality, sustainable development, theory, Abraham Maslow, creativity, productivity, quality life, rural, safety, culture, values, need, human resource management, well-being, workplace, academic libraries cold war, behavior, cognition, demand, and development. As a result of the analysis, it was understood that the concepts of management, performance, work, job satisfaction, personality, self, attitudes, environment, healthcare, perceptions, participation, antecedents, and science have strong relationships together. The results obtained in Maslow and management research have revealed that organizational activities are also effective in addition to the needs and psychological aspects of individuals.
AtıfScopus6OpenAlex4İncele - MakaleAçık Erişim2024Scopus SJRQ3Nonlinear optical response of LinClK (n = 1–6) superalkali clusters
Şentürk, Şükrü; Ekincioğlu, Yavuz; Doğan, Ümit
The geometrical structures, stabilities, electronic properties and nonlinear optical response of the halogen doped bimetallic LinClK (n = 1–6) clusters were studied within the density functional theory. Based on the dissociation energy, second order energy difference and GH-L (HOMO-LUMO gap), the LinClK (n = 2, 4, 6) clusters are more stable. According to their ionization energies, the clusters can be classified as a superalkali. From the NBO analysis, the clusters are excess electron systems. The obtained first static hyperpolarizability (o) values are in the range of 1.56 × 104 − 4.33 × 104 au while the second static hyperpolarizability vary within 2.47 × 106 au to 13.9 × 106 au for the LinClK (n = 1–6) superalkalis that are slightly higher than the nonlinear optical response of halogen doped monometallic clusters. More importantly, the Li5ClK is transparent in the deep UV region ( < 300 nm) among the superalkalis indicating that the Li5ClK superalkali can be a candidate structure as new member of NLO materials.
AtıfScopus1WoS1OpenAlex1İncele