Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Gul, Muhammet(82)
- Akkurt, Nevzat(67)
- Güler, Ömer(66)
- Baskonus, Haci Mehmet(62)
- Bulut, Hasan(60)
- Tekin, H.O.(52)
- ALMisned, Ghada(49)
- Yucesan, Melih(43)
- Yildirim, Numan(42)
- Yildirim, Nuran Cikcikoglu(38)
- Paksoy, Mehmet Yavuz(36)
- Serdar, Osman(36)
- Zengin, Gokhan(36)
- Ince, Muharrem(34)
- Celik, Erkan(33)
- Benzer, Fulya(32)
- Kocabaş, Mehmet(30)
- Sulaiman, Tukur Abdulkadir(30)
- Tanyol, Mehtap(29)
- Yildirim, Ozal(28)
- Aslan, Naim(26)
- Kök, Mediha(26)
- Özkul, İskender(26)
- Ates, Mehmet(25)
- Danabas, Durali(25)
- Kutluyer, Filiz(25)
- Can, Erkan(24)
- Kutlu, Banu(23)
- Onat, Onur(23)
- Demir, Veysel(22)
- Erten, Fusun(22)
- Guler, Omer(22)
- Say, Yakup(22)
- Güler, Seval Hale(21)
- Yaman, Mehmet(21)
- Baykal, Duygu Sen(20)
- Sançar, Taylan(20)
- Susam, Selim Orhun(20)
- Cakilcioglu, Ugur(19)
- Orhan, Cemal(19)
Yayınlar
- MakaleYalnız künye2023Scopus SJRQ3On the weighted tests of independence based on Bernstein empirical copula
Hudaverdi, Burcu; Susam, Selim Orhun
In this article, we propose a flexible weighted test of independence based on Cramér-von Mises statistic of the Bernstein empirical copula process. We investigate the asymptotic properties of the new weighted test. A Monte Carlo study is conducted to measure the power performance of the new test under various dependence structures and also to compare the performance with some other alternative tests. The effects of the weights and the selection of optimal Bernstein polynomial degree are significantly influencing the power of the test according to the particular type of dependence. Finally, the procedure is also applied to a dataset on diabetes for illustrative purpose.
AtıfScopus8WoS8OpenAlex7
İncele - MakaleYalnız künye2023Scopus SJRQ2The potential ameliorative impacts of rare earth element cerium in dimethoate induced toxicity in freshwater mussel Dreissena polymorpha
Serdar, Osman; Ketenalp, Zozan; Cikcikoglu Yildirim, Nuran
The purpose of this study was to measure the antioxidant parameters to examine the potential ameliorative impacts of the rare earth element (REE) cerium (Ce) in dimethoate (DM) induced toxicity in Dreissena polymorpha. Lethal concentration 50 (LC50) of DM for 96 h was measured. The antioxidant effect of Ce was investigated by exposure of 1/2 of the LC50 value of DM together with 4, 20 and, 100 mg/L of Ce to D. polymorpha. The responses of the biomarkers were determined by measuring the superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx), glutathione (GSH) and malondialdehyde (MDA) levels. SOD, CAT, GPX and GSH levels were reduced (p < 0.05), while the MDA levels increased significantly (p < 0.05) in mussels exposed to DM. When DM was exposured together with Ce, it was observed that the MDA levels decreased, SOD, CAT, GPX and GSH levels increased during 24 and 96 h. The results of our study showed that Ce exerted a strong antioxidant effect on toxicity induced by DM. It has been shown that Ce may have a compensatory effect with the positive change in the antioxidant response of D. polymorpha to DM. This study is the first report about Ce and insecticide effects in bivalves.
AtıfScopus1WoS1OpenAlex1İncele - MakaleAçık Erişim2023Scopus SJRQ2Surface Morphology, Structural, Photovoltaic and Optoelectronic Properties of Diamond Like Carbon-Copper Nanostructures
Kara, Salih; Aslan, Naim; Kurt, Mustafa Şükrü
In this work, we produced Cu doped diomond like carbon films using the magnetron sputtering technique and assessed their structural electrical and optoelectronic characteristics. In the atomic force microscopy (AFM) measurements, it was observed that the surface of the Cu-DLC nanocomposite films was in a granular form and the presence of cluster-like formations. D and G bands, which are the characteristic peaks of the DLC structure, were observed in the Raman spectrum, while Cu and C peaks were observed in the energy dispersive (EDX) spectrum. Photocurrent, photocapacitance, photosensitivity and photoresponse values increased depending on the increasing light intensity. However, the Cu-DLC/n-Si structure displayed low photovoltaic properties. The capacitance and conductance values were considerably affected by the increase in AC signal frequency. The series resistance and the density of the interface states exhibited low frequency dependent behavior which were obtained using the electrical characteristics of the nanocomposite films.
AtıfScopus7WoS7OpenAlex6İncele - MakaleAçık Erişim2023Scopus SJRQ3Performance evaluation of steel-concrete composite structures designed in poorly graded soils
Etli, Serkan
In this study, the seismic behavior of steel concrete composite buildings in a specific region was investigated. For this purpose, 5-, 10-, 15- and 20-storey composite moment-resisting framed structures were designed. Moment-resist-ing composite framed structures are modeled with concrete-filled steel tube columns and designed and modeled using composite beams. The buildings are designed according to ÇYTHYE-2016 and TBEC-2018 regulations at design levels with high ductility. In the design of the designed structures, the peak ground acceleration value is 0.79 g, and the design ground is planned as ZE class. SeismoStruct software was used for the design and performance evaluation of the structures. During the performance evaluations of the structures, nonlinear static pushover and incremental dynamic analyzes were used. Uniform and triangular load distributions are adopted in the static pushover analysis and 16 earthquake ground mo-tions are used in the incremental dynamic analysis. Evaluation of the effect of the number of stories on the earthquake behavior of composite moment-resisting framed structures was investigated using the non-linear analyzes mentioned. Ac-cordingly, lateral response, overstrength factors, ductility, and dynamic behavior factor values for composite frame struc-tures were calculated and presented using the relevant analysis results. It has been calculated that the behavior factor of all moment-resisting composite framed structures can perform well above the design assumptions, whereas moment-resistant composite framed structures absorb seismic energy by using inelastic deformations. Ductility is almost 30% higher than the design assumption for international standards. As a result, it was concluded that these structures could continue to serve theoretically.
AtıfScopus6WoS3OpenAlex9İncele - MakaleYalnız künye2023Scopus SJRQ3Thermal Device Beyond the Carnot Limit
Zengin, B.; Askin, M.; Salti, M.; Aydogdu, O.
Based on the Carnot cycle, we construct a theoretical heat engine working through the agency of the generalized polytropic gas. A heat engine described by using a thermodynamic equation-of-state defines a thermodynamical relation among state quantities such as internal energy U, volume V, entropy S, temperature T and heat capacity C. Investigating the thermal efficiency of the constructed heat engine shows that more efficient heat engine is obtained from the Carnot heat engine when the pressure of the working material takes certain values.
AtıfOpenAlex1İncele - MakaleAçık Erişim2023Scopus SJRQ1An Integrated Approach for Assessing Suppliers Considering Economic Sustainability Innovation
Ahmadi, Hadi Badri; Pamucar, Dragan; Pourhejazy, Pourya; Kaya, Sema Kayapinar; Liou, James J. H.
Innovation plays a key role for improving the sustainability performance of corporations. A truly sustainable innovative firm needs to take the social, environmental, and economic aspects of sustainable innovation into consideration. However, limited studies have investigated the economic aspect of sustainable innovation, especially in the context of supplier evaluation from emerging economies. To deal with this issue, this manuscript puts forward a criteria decision framework for evaluating economic sustainable innovative suppliers. A new methodology based on fuzzy Full Consistency Method (FFUCOM) and Improved Combinative Distance-based Assessment (ICODAS) is developed and extended using interval rough Dombi-Bonferroni operators. In the developed approach, the FFUCOM is employed to determine the criteria weights, and the ICODAS is responsible for assessing and ranking the suppliers. A case study from the manufacturing sector of an emerging economy is considered for validating the developed framework and decision model. The findings introduce the 'financial resumption of products' as the most critical economic innovation criterion for evaluating suppliers. This article significantly helps decision-makers and practitioners to better comprehend the underpinnings of sustainable innovation economic dimension, particularly when assessing their suppliers. Furthermore, the applicability and validity of the proposed model was confirmed by the results of sensitivity analysis. Findings demonstrated that the proposed method is a solid and useful MCDM framework, and its outputs are precise and acceptable.
AtıfScopus9OpenAlex6İncele - MakaleYalnız künye2023Scopus SJRQ3ENTROPY ANALYSIS OF HYBRID NANOFLUID FLOW OVER A ROTATING POROUS DISK: A MULTIVARIATE ANALYSIS
Prakash, J.; Tripathi, Dharmendra; Akkurt, Nevzat; Shedd, Tim
This article discusses the flow of a time-dependent biviscosity hybrid nanofluid boundary layer across a rotational permeable disk with effects of magnetic field and thermal radiation, and the subjective and quantitative transfer of heat flow. In the classic Von Karman issue, nanofluids comprising volume fractions ofAg-MgO/60% water and 40% ethylene glycol are considered instead of Newtonian regular fluids. The governing equations are transformed nonlinear ordinary differential equations using Von Karman transformations. The equation for the generation of entropy is calculated as a function of velocity and temperature gradient. This equation is made nondimensional by adding geometric and physical flow field-dependent parameters. The velocity profiles in the radial, tangential, and axial directions, as well as the axial pressure gradient, nanoparticle temperature distribution, local skin friction, Nusselt number, and Bejan number, are calculated by using MATLAB bvp4c. The multivariate analysis is implemented in the numerical results of the Nusselt number. A rotation parameter is generated by the spinning phenomena, which regulates the disk’s movement. Increasing the rotation of the disk causes fluid velocity to accelerate in both the radial and cross-radial directions, while contrasting phenomena can be noticed in the axial velocity of the flow. The temperature and wall shear stress of a nanofluid both rise with the disc’s Brinkman number and the volume fraction of nanoparticles. Increasing the thickness of the thermal boundary layer raises the axial pressure gradient. Entropy measured by the Bejan number Influences the magnetic field and the Biot number. Physical parameters presented in this article may be used to optimize the system’s performance. A magnetic rotating porous disk drives could be used in nuclear space propulsion engines and in heat transfer augmentation in thermal management and renewable energy sources.
AtıfScopus6WoS6OpenAlex6İncele - MakaleAçık Erişim2023Scopus SJRQ2Paleoseismology of the Ganos segment; the western extend of the North Anatolian Fault (Turkey)
Aksoy, Murat Ersen; Meghraoui, Mustapha; Ferry, Matthieu; Çakir, Ziyadin; Uçarkuş, Gülsen; Sançar, Taylan; Altin, Mehmet Uğur
The Ganos fault that ruptured on 9 August 1912 (Mw: 7.4) is the westernmost inland segment of the North Anatolian fault (NAF). Here, the Ganos fault is bounded at its two tips with offshore faults segments, in the Sea of Marmara to the east and the Gulf of Saros to the west in the North Aegean Trough. Therefore, the paleoseismology of the 45-km-long inland fault is of importance to the seismic hazard analysis related to offshore active faults and in particular for the seismic gap in the Marmara Region. Earlier studies have established an earthquake chronology for the western and eastern inland tips of the Ganos fault. Here, we extend the paleoseismic studies toward the central segment. Three trenches at Yörgüç have revealed evidence for two faulting events, possibly post-1669 CE ±30 years, which can be correlated to the 1659 or 1766, and the 1912 historical earthquakes. At Yeniköy, we determined an offset of 46 ± 1 m and 47 ± 1 m on a stream channel and a ridge-crest, respectively. In two trenches we determined two faulting events for the last 1000 years and seven events for the last 3500 years. In trench T5, the base of the displaced stream channel provides a calibrated date of 829–591 BCE. Using the 46 ± 1 m right-lateral displacement, we calculate a slip rate of 16.9 ± 0.7 mm/year for the last 2732 ± 119 years. A combined analysis with earlier paleoseismic studies on the Ganos fault suggests that the historical earthquakes of 1912, 1766b or 1659, 1354 or 1343a, and 1063 ruptured the entire inland fault section. In such a case, the recurrence interval for this section of the NAF corresponds to 283 ± 81 years. Combining earlier estimations, we suggest an average slip rate of 17.1 ± 0.9 mm/year for the last 2700 years and observe a characteristic slip behavior of 4.5 to 5 m per event for this section of the North Anatolian plate boundary fault.
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İncele - MakaleAçık Erişim2023Scopus SJRQ1A comprehensive study on structural properties, photon and particle attenuation competence of CoNiFeCr-Ti/Al high entropy alloys (HEAs)
Sakar, Erdem; Guler, Omer; Alım, Bünyamin; Say, Yakup; Dikici, Burak
It is well known that high entropy alloys (HEAs) have a wide range of potential applications as radiation shielding due to their superior properties. The CoNiFeCr-Ti/Al compositions were chosen for their low cost as HEA in this study. The HEAs were successfully produced using the mechanical alloying (MA) method with equimolar CoNiFeCr, CoNiFeCrAl, and CoNiFeCrTi compositions. The production and structural properties of the alloys were investigated in detail. Besides, the photon and particle radiation shielding properties of the HEAs were calculated with the help of Phy-X/PSD, SRIM (10 keV-20 MeV), and ESTAR (10 keV-20 MeV) programs. The photon-matter interaction parameters were calculated in both specific photon energies emitted from 241Am, 133Ba, 109Cd, 60Co, 137Cs, 131I, and 22Na nuclides and a continuous energy range of 15 keV-15 MeV. The characterization of the alloys was investigated by using X-ray diffraction (XRD) and scanning electron microscopes (SEM) attached to an energy dispersive spectroscopy (EDX). It was found that the HEAs have a highly amorphous structure due to the selected production method. The crystal size of the alloys was calculated as 70, 35, and 20 nm for CoNiFeCr, CoNiFeCrAl, and CoNiFeCrTi, respectively. In terms of shielding properties, it has been determined that the produced HEAs have better shielding characteristics for photon and particle radiations than standard shielding concretes. In addition, the results demonstrated that CoNiFeCr alloy, which has the best shielding ability among the HEA alloys, can be used as a shielding material application requiring photon, electron, proton, alpha, and neutron radiations.
AtıfScopus30WoS32OpenAlex32İncele - MakaleYalnız künye2023Scopus SJRQ2Isolation, morphological identification, and xylanase characteristics of anaerobic gut fungi Neocallimastix from Anatolian wild goat
Kar, Bülent; Torcan, Berat
This study shows the morphological identification of anaerobic fungal strains isolated from fecal samples of goats inhabiting Turkey and the effects of various metal ions and chemicals on extracellular xylanase production. Three different anaerobic gut fungi isolated from wild goats in Turkey were identified as Neocallimastix spp. xylanase, cellulase, and lichenase production were tested in culture supernatants, and the maximum-specific activities were found as 560.42 ± 9.39, 159.70 ± 3.88, and 157.36 ± 3.83 (μmol/min/mg protein), respectively. While the optimum temperature range of exo-xylanases was found as 40–50°C, their optimum pH range was determined as 6.0–6.5. Xylanase activity decreased in metal ions and other chemical reactants based on dose. The metal ion that significantly inhibited xylanase activity was Fe+3. It was found that the ferric ions inhibited xylanase activity in all three anaerobic gut fungi by 30%–90% depending on molarity. On the contrary, the 1 mM concentrations of the Mn+2, Ba+2, Co+2, Cu+2, Sn+2, and Mg+2 metal ions and the ethylenediaminetetraacetic acid and β-mercaptoethanol reagents had a positive effect at rates in the range of 3%–92%. In conclusion, these findings demonstrate that anaerobic gut fungus has very stable fibrolytic enzymes that need to be separated, as well and the existence of a unique resource for industrial applications.
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İncele - MakaleAçık Erişim2023Scopus SJRQ2Modeling the electrical conductivity value of the model solution
Sabanci, Serdal; Kaya, Kübra; Göksu, Ali
The ohmic heating process is one of the novel electrical heating methods that are considered as fast, homogeneous and efficient heating. In this study, the details of the relationship between electrical conductivity (EC)-Temperature (Temp) and EC-pH-Temp at different Total Soluble Solid Content (TSSC) and different pH values were examined. Especially, the study explains details of the electrical conductivity value due to pH change (2, 2.5, 3, 3.5) and expressing EC change depending on the pH value of fruit and vegetable juices. At constant pH, EC values decrease with increasing TSSC values (10%, 20%, 30%, 40%, 50%, 60%) and decrease with increasing pH at constant TSSC value. When the relationship between Temp-EC is analyzed that the EC value increases as Temp increases in all cases and this increase is linear. It was found that the Temp-EC relationship was in high compatibility with an R2 value above 0.97. Also, in the Temp-EC-pH relationship, the R2 value was found to be an acceptable value above 0.95.
AtıfScopus4WoS3İncele - MakaleYalnız künye2023Scopus SJRQ3Green Synthesis and Encapsulation of Superparamagnetic Magnetite for Mercury (II) Removal: Adsorption Isotherms, Adsorption Kinetics, and Thermodynamic Studies
Alp Kavlo, Hevidar; Ince, Muharrem; Kaplan Ince, Olcay; Aydogdu, Burcu; Ozcan, Cemile
Mercury (II) ions have significant ecological impacts. In the current study, magnetized iron oxide (Fe3O4) nanoparticles were green synthesized and encapsulated with alginate (ALG). The nanoparticles were converted into a composite (Fe3O4/ALG). The Fe3O4/ALG beads were used to remove Hg (II) from industrial wastewater. Characterization was performed by X-ray diffraction (XRD), scanning electron microscopy—energy dispersive spectroscopy (SEM-EDS), Fourier transform infrared spectroscopy (FT-IR), and thermogravimetric analysis-differential thermal analysis (TGA-DTA). A central composite design (CCD) approach was performed to define the experimental conditions providing the highest global adsorption efficiency and to optimize the pH, temperature and adsorbent mass. Hg (II) concentrations were determined by flame and electrothermal atomic absorption spectrometry (FAAS and ETAAS). The limits of detection (LOD) and quantification (LOQ) were 1.2 mg L−1 and 3.5 mg L−1 for FAAS and 0.2 µg L−1 and 0.5 µg L−1 for ETAAS, respectively. Additionally, Langmuir, Freundlich, and Temkin isotherm models were employed to determine the adsorption mechanism. The adsorption capacity of Fe3O4/ALG was determined to be 49.18 mg g−1 by the Langmuir model. Kinetic studies revealed that the adsorption of Hg (II) best fitted the pseudo-second order model. The Gibb’s free energy (ΔG°) values showed that the adsorption of Hg (II) on Fe3O4/ALG occurred spontaneously.
AtıfScopus8WoS8OpenAlex10İncele - MakaleYalnız künye2023Scopus SJRQ1Region Specific Ground-Motion Predictive Models for Shallow Active Regions
İçen, Abdullah; Sandikkaya, M. Abdullah
Using a global dataset, we propose a series of ground-motion predictive models for acceleration response spectra. The proposed models include regional adjustments to source, path, and site terms with nonlinear soil behavior. The regression coefficients are computed using linear and nonlinear mixed-effect regression algorithms. Furthermore, we develop heteroscedastic variability models for between-event, site-to-site, and single-site standard deviations. The between-event sigma model depends solely on magnitude, but the single-site standard deviation model depends on both magnitude and distance. Finally, the site-to-site standard deviation model is given in terms of VS30 and spectral acceleration at rock site condition.
AtıfScopus7WoS7OpenAlex9İncele - MakaleAçık Erişim2023Scopus SJRQ3Seasonal changes in fatty acid profile of the freshwater snail Viviparus contectus (Millet, 1813) from lake habitat
Özçiçek, Esin; Kutluyer Kocabaş, Filiz; Kocabaş, Mehmet; Yilmaz, Ökkeş
The freshwater snail, Viviparus contectus, is an important shellfish owing to its nutritional composition (i.e., high amounts of protein, essential amino acids, fatty acid profile and minerals) and its promise as a candidate for the treatment of some diseases in traditional medicine. Hence, the seasonal changes in the fatty acid (FA) profile of Viviparus contectus caught from Demirköprü Dam Lake were determined in this study. Saturated fatty acid (SFAs) (64.54–80.39% of total fatty acids) had the highest concentration followed by polyunsaturated fatty acids (PUFAs) (10.63–21.83%) and monounsaturated fatty acids (MUFAs) (6.57–10.13%). Stearic acid (C18:0) was the major SFA while arachidonic acid (C20:4 n−6) was the major PUFA. The season significantly affected the FA profile of V. contectus while no significant difference was determined between seasons with respect to tissue MUFAs levels. A higher level of total SFAs was detected during spring (80.39%) while a higher proportion of MUFAs was detected during the winter (10.13%). The total amounts of PUFAs were highest in winter (21.83%). Overall, V. contectus has nutritional value. However, V. contectus caught in autumn may be nutritionally the most valuable for human consumption due to higher eicosapentaenoic acid 20:5 n−3 and docosahexaenoic acid contents.
AtıfScopus3WoS1OpenAlex4İncele - MakaleAçık Erişim2023Scopus SJRQ2Effects of İnclined Plate in a Channel to Control Melting of PCM in a Body İnserted on the Bottom Wall
Öztop, H.F.; Bakır, E.; Selimefendigil, F.; Gür, M.; Coşanay, H.
A two-dimensional time-dependent computational analysis was carried out to examine the effects of inclined plate on melting time of Phase Change Material (PCM) filled square block on the bottom wall of a channel. Solution of the governing equations are performed by using finite volume method. The RT25HC material is chosen as PCM. The study is done for different parameters of inclination angle of the plate and Reynolds number. It is observed that the inclined plate can be used to control of melting time of PCM in a block as well as flow field and temperature distribution in the channel. Using of acceleration angle as θ = 110° accelerates the melting time of PCM inside the block. Thus, mass fraction rate increases 4 times with application of inclined thin plate.
AtıfScopus31WoS27OpenAlex29İncele - MakaleAçık Erişim2023Scopus SJRQ4The Assessment of Health Risk from Heavy Metals with Water Indices for Irrigation and the Portability of Munzur Stream: A Case Study of the Ovaclk Area (Ramsar Site), Türkiye
Kutlu, Banu; Sarlgül, Ali
Surface water samples from the area of Munzur Stream in Türkiye (a Ramsar site) were evaluated for their suitability for irrigation and drinking purposes using different water quality indices. The human health risks were assessed as well. The study was conducted over a period of 24 months from January 2019 to December 2021 by taking samples from nine stations every month in order to determine the water quality of Munzur Stream, located in Tunceli. According to the results, Munzur Stream is in good condition in terms of the quality of drinking water and irrigation water. The concentrations of heavy metals such as Cu, Ni, Fe and Hg were high, though the water quality parameter according to Türkiye Ministry of Forestry and Water Affairs Surface Water Quality Regulations (TSWQR) was significantly lower than the permitted limits. In Munzur Stream, the irrigation water for all stations was reported to be excellent, good and suitable in terms of SAR, Na% and MH, respectively. The principal component analysis data formed the four principal components, explaining 98.22% of the total variance. The sources of pollution in this area include the rock types of the basin, soil erosion, domestic waste water discharge and agricultural flow of inorganic fertilisers.
AtıfWoS1OpenAlex3İncele - MakaleYalnız künye2023Scopus SJRQ2Physicochemical Properties for Food Packaging and Toxicity Behaviors Against Healthy Cells of Environmentally Friendly Biocompatible Starch/Citric Acid/Polyvinyl Alcohol Biocomposite Films
Gürler, Nedim; Paşa, Salih; Erdoğan, Ömer; Cevik, Ozge
The current study focuses on the fabrication, characterization, and cytotoxic effects of polymeric biocomposite films composed of starch, various concentrations of citric acid (3%, 6%, and 9%), and polyvinyl alcohol. The cross-linked corn starch (S)-polyvinyl alcohol (P) biocomposite films are prepared by casting technique using glucose (G) and fructose (F) as plasticizers. The chemical structure of obtained films is characterized by Fourier transform infrared and x-ray diffraction. Physicochemical parameters of the films such as solubility, swelling capacity, and water vapor permeability, optical and mechanical properties are investigated. Furthermore, the cytotoxicity is evaluated to determine the biocompatibility of samples. The physicochemical properties of S-P(Starch-Polyvinyl alcohol) films improve with the addition of citric acid during the esterification reaction. The tensile strength for Starch-Polyvinyl alcohol-Glucose blend composition with 3% citric acid (SPG3) and Starch-Polyvinyl alcohol-Fructose blend composition with 3% citric acid (SFG3) biocomposite films is determined as 10.17 and 8.24 MPa, respectively, compared to 8.16 and 7.94 MPa for without citric acid, respectively. The cell viability values of biocomposite films towards NIH-3T3 and L929 cells are calculated 90% compared to the control group. Thus, it demonstrates that they are also quite biocompatible materials.
AtıfScopus34WoS37OpenAlex37İncele - MakaleAçık Erişim2023Scopus SJRQ3Structural, physical, and radiation absorption properties of a significant nuclear power plant component: A comparison between REX-734 and 316L SS austenitic stainless steels
Say, Yakup; Güler, Ömer; Kavaz, Esra; ALMisned, Ghada; Ene, Antoaneta; Tekin, Huseyin Ozan
Austenitic stainless steels (SSs) are commonly used as in-core and surrounding structural materials in today’s industrial BWR and PWR systems. Such adaptable steels have also been the primary materials studied and used in several advanced nuclear reactor technologies, such as fast breeding and magnetic fusion reactors. In this study, some critical material properties, such as structural, physical, and radiation-shielding properties of REX-734 and 316L SS, were experimentally evaluated and compared to those of a number of other alloys. In addition to homogeneous element distribution, both alloys exhibit strong crystal orientation. The REX-734 alloy has a tensile strength of 1,259 MPa, whereas the 316L SS alloy has a tensile strength of 495 MPa. Moreover, nitrogen in the REX-734 alloy formed ultra-hard nitrides with Cr, Nb, and Si and precipitated into the structure and increased the strength. According to our findings, the mass attenuation coefficient values of the 316L SS sample were slightly higher than those of the REX-734 sample at all energies. It can be concluded that the REX-734 sample, with its exceptional strength qualities and excellent radiation attenuation capabilities, may be a viable nuclear power plant material for future investigations.
AtıfScopus7İncele - MakaleYalnız künye2023Scopus SJRQ2Analysis of awareness of gynaecological cancers İn women using social media
Alp Dal, Nursel; Gümüşsoy, Süreyya; Ertem, Gül
This study aimed to use social media to investigate the relationship between the demographic, obstetric and gynaecological characteristics and the awareness of gynaecological cancer among women. The data were collected between 1st March and May 2018 using an internet-baseline survey/surveymonkey/google form. The sample was consisted of 1227 women who were literate, active social media users and had volunteered to participate in the study via social media. The GCAS scores of women who were in the age range 20–24 years, primary school graduates, no social security, were not pregnant, had a miscarriage, did not examine their external genital organs, had not entered the menopause and who did not use any family planning methods, were lower than the other women. The GCA of the women was found to be high.
AtıfScopus3WoS2OpenAlex5İncele - MakaleAçık Erişim2023Scopus SJRQ3Investigation of thermophysical properties of synthesized SA and nano-alumina reinforced polyester composites
Şahal, Hakan; Aydoğmuş, Ercan; Arslanoğlu, Hasan
Synthesis and characterization of 4-[(E)-(5-bromo-2-hydroxybenzylidene) amino]-N-(4-methylpyrimidin-2-yl) benzenesulfonamide (SA) has been performed. Alumina (Al2O3) and SA reinforced polyester composites are synthesized, and characterization processes are carried out. SA formed has been characterized by Fourier transform infrared (FTIR) spektrofotometre and nuclear magnetic resonance (NMR) spectroscopy. The thermal decomposition behavior of the nanocomposites in a nitrogen environment under non-isothermal conditions from 298 to 973 K is investigated with proportional-integral-derivative (PID) system. Thermal conductivity, Shore D hardness, and thermal decomposition behaviors of the nanocomposites that are added with alumina filler and synthesized with SA reinforcement have been compared. Nano-alumina filler raises the thermal conductivity coefficient and Shore D hardness of the polyester composites. The addition of synthesized SA reduces both the thermal conductivity coefficient and Shore D hardness. The thermal conductivity coefficient has been measured at the lowest in the pure polyester (0.056 W/m·K), and highest in the nano-alumina reinforced composite (0.072 W/m·K). The lowest Shore D hardness (nearly 68) is determined in the synthesized SA reinforced composite. Also, the experimental study has been optimized with the help of response surface methodology (RSM), and the improved theoretical models have been evaluated by statistical analysis.
AtıfScopus5WoS6OpenAlex13İncele