Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Baskonus, Haci Mehmet(10)
- Bulut, Hasan(10)
- Sulaiman, Tukur Abdulkadir(9)
- Erguven, Gokhan Onder(2)
- Yildirim, Numan(2)
- Acharya, U. Rajendra(1)
- Aksakal, B.(1)
- Aksakal, Bünyamin(1)
- Akturk, Tolga(1)
- Aktürk, Tolga(1)
- Ay, Betul(1)
- Aydin, Galip(1)
- Baloglu, Ulas Baran(1)
- Canpolat, Erdal(1)
- Cattani, Carlo(1)
- Demirel, Mehtap(1)
- Ince, Muharrem(1)
- Kaplan Ince, Olcay(1)
- Karakaya Cirit, Didem(1)
- Kaya, Ali İhsan(1)
- Kocabaş, Mehmet(1)
- Kutluyer, Filiz(1)
- Puthankattil, Subha D.(1)
- Say, Y.(1)
- Serdar, Osman(1)
- Talo, Muhammed(1)
- Tanyol, Mehtap(1)
- Yaman, Mehmet(1)
- Yazgan, Tugba(1)
- Yel, Gülnur(1)
- Yildirim, Nuran Cikcikoglu(1)
- Yildirim, Ozal(1)
Yayınlar
- MakaleYalnız künye2019Scopus SJRQ2Gammarus pulex as a Model Organism to Assess the Residual Toxicity of Slaughterhouse Wastewater Treated by Electrocoagulation Process
Yildirim, Nuran Cikcikoglu; Tanyol, Mehtap; Serdar, Osman; Yildirim, Numan
It was assessed the efficiency of the electrocoagulation (EC) in slaughterhouse wastewater (SW) treatment by using antioxidant parameters of Gammarus pulex. The SW was treated by EC. Superoxide dismutase (SOD), glutathione peroxidase (GPx) and catalase (CAT) activities and malondialdehyde (MDA) levels in G. pulex exposed to pre- and post-treated of the SW during 24 h and 96 h were analysed. Standard methods were applied during the analysing process of the physicochemical quality parameters for both untreated and treated SW. All measured physicochemical parameters were decreased following the treatment process via EC. After the treatment process, it was observed that while SOD activities and MDA levels were decreased, CAT activities were increased and GPx activities did not exhibit any change. In conclusion, the present study demonstrated the abilities of untreated SW to promote oxidative stress in model organism. The SOD, CAT activities and MDA levels in G. pulex revealed that EC process were efficient in the SW treatment.
AtıfScopus10WoS9OpenAlex13
İncele - MakaleYalnız künye2019Scopus SJRQ2Silver/Selenium/Chitosan-doped Hydroxyapatite coatings on biological NiTi alloy: In vitro biodegradation analysis
Say, Y.; Aksakal, B.
Abstract: Nitinol (NiTi) substrates were bioceramic coated by single layer Hydroxyapatite (HA), double layer HA/Silver (Ag) and double-layered HA/Selenium (Se)–Chitosan (Cht) substitutions by sol–gel method. Surface morphologies and adhesion strengths of the obtained coatings were characterized by means of SEM, EDX, XRD, and adhesion tests. Crack-free coatings were obtained in single layer-HA (S1), double layer HA/Ag (S2), and double-layered HA/Selenium–Cht (S3) coatings on NiTi alloys executed via the sol–gel method. Degradation behavior was analyzed in via simulated body fluid (SBF) environment by means of weight loss (%) and ion release rates for 1–4 weeks of immersion periods. The degraded coating particles were measured and metallic ions were detected quantitatively by an inductively coupled plasma–mass spectrometer (ICP–MS). The results show that such coatings could minimize and/or prevent the degradation of metallic ions and weight loss (%) from the coated substrates. From the overall results, HA/Ag double layer biocomposite (S2)-coated NiTi substrates revealed the highest adhesion strength and lowest weight loss and degradation. It was also shown in all groups that the Ni ion release from the NiTi substrates was prevented by the coatings. [Figure not available: see fulltext.].
AtıfScopus10WoS9OpenAlex11İncele - MakaleAçık Erişim2019Scopus SJRQ1A study on the technological pedagogical contextual knowledge of science teacher candidates across different years of study
Karakaya Cirit, Didem; Canpolat, Erdal
This case study survey investigates the Technological Pedagogical Contextual Knowledge (TPCK) of Science Teacher Candidates (STC) across different years of study in the Topic of Renewable Energy (TRE). In line with the transformative model, the study treats TRE-TPCK as a new knowledge domain emerging from the interaction between content, technology, pedagogy and contextual knowledge. Participants were 36 Science Education students who were in their 1st, 2nd, 3rd and 4th years of study during the 2014–2015 academic year. Teacher candidates’ TPCK was identified through semi-structured interviews based on (1) Vignettes, (2) Anecdotes from a teacher named Zeynep and the (3) Content Presentation Technique (CPT). The data were analyzed by using the content analysis technique. The findings showed that the TRE-TPCK of teacher candidates across different years of study was at a similar and less-than-ideal level. STCs in different years of study mostly disregarded the macro and meso contexts when teaching the topic of renewable energy and were partially competent in the sub-meso, micro and sub-micro contexts. They particularly lacked technology-integrated evaluation knowledge when teaching TRE.
AtıfScopus8WoS8OpenAlex10İncele - MakaleYalnız künye2019Scopus SJRQ2The Evaluation of Imidacloprid Remediation in Soil Media by Two Bacterial Strains
Erguven, Gokhan Onder; Yildirim, Numan
Imidacloprid (C9H10ClN5O2) is used as the most recommended type of insecticide in vegetable farming worldwide. Two types of bacteria (Methylobacterium radiotolerans and Microbacterium arthrosphaerae) were isolated from a corn farming field in the Thrace region of Turkey, and then consortia of these bacteria were prepared from equal volumes of 107 CFU/ml for each bacterium type. Imidacloprid remediation studies were carried out during 18 days in soil test units. The water filtered from these soil test units was determined for chemical oxygen demand (COD) and biochemical oxygen demand (BOD5) to determine the optimum concentration of microorganisms to ascertain the best removal efficiency of Imidacloprid. COD removal rates were 98.7%, 96.4% and 51.6% with 80, 40, and 20 ml volumes of the consortia of bacteria, respectively, at the end of 18 days. The BOD5 removal rates were 88.4%, 78.6% and 49.9% in the same volumes of bacteria, respectively. As a result of this study, we have found that this bacterial consortium is very effective for the bioremediation of this insecticide at the two volumes of 40 and 80 ml, both being better than 20 ml.
AtıfScopus35WoS34OpenAlex37İncele - MakaleAçık Erişim2019Scopus SJRQ2Automated Depression Detection Using Deep Representation and Sequence Learning with EEG Signals
Ay, Betul; Yildirim, Ozal; Talo, Muhammed; Baloglu, Ulas Baran; Aydin, Galip; Puthankattil, Subha D.; Acharya, U. Rajendra
Depression affects large number of people across the world today and it is considered as the global problem. It is a mood disorder which can be detected using electroencephalogram (EEG) signals. The manual detection of depression by analyzing the EEG signals requires lot of experience, tedious and time consuming. Hence, a fully automated depression diagnosis system developed using EEG signals will help the clinicians. Therefore, we propose a deep hybrid model developed using convolutional neural network (CNN) and long-short term memory (LSTM) architectures to detect depression using EEG signals. In the deep model, temporal properties of the signals are learned with CNN layers and the sequence learning process is provided through the LSTM layers. In this work, we have used EEG signals obtained from left and right hemispheres of the brain. Our work has provided 99.12% and 97.66% classification accuracies for the right and left hemisphere EEG signals respectively. Hence, we can conclude that the developed CNN-LSTM model is accurate and fast in detecting the depression using EEG signals. It can be employed in psychiatry wards of the hospitals to detect the depression using EEG signals accurately and thus aid the psychiatrists.
AtıfScopus279OpenAlex291İncele - MakaleAçık Erişim2018Scopus SJRQ2Bright, dark optical and other solitons to the generalized higher-order NLSE in optical fibers
Baskonus, Haci Mehmet; Sulaiman, Tukur Abdulkadir; Bulut, Hasan
In this paper, we study the generalized higher-order nonlinear Schrödinger equation analytically. We use two integral schemes for conducting this study. Dark, bright, combined dark–bright optical, singular soliton, soliton-like and trigonometric function solutions are successfully constructed. We give the constraint conditions for the existence of valid solutions. The 2D, 3D and the contour graphs for the dark and bright solitons are plotted.
AtıfScopus32OpenAlex35İncele - MakaleAçık Erişim2018Scopus SJRQ2On the solitary wave solutions to the longitudinal wave equation in MEE circular rod
Bulut, Hasan; Sulaiman, Tukur Abdulkadir; Baskonus, Haci Mehmet
This study investigates the longitudinal wave equation in a magneto-electro-elastic circular rod by using the extended sinh-Gordon equation expansion method. Topological, non-topological and singular soliton solutions are extracted. To illustrate the physical appearance of the obtained solutions, 2D, 3D and the contour graphs to some of the obtained solutions are plotted. The reported results may be useful in explaining the physical meaning of the studied models and other nonlinear physical models arising in nonlinear sciences.
AtıfScopus43OpenAlex43İncele - MakaleAçık Erişim2018Scopus SJRQ2Dark, bright and other optical solitons to the decoupled nonlinear Schrödinger equation arising in dual-core optical fibers
Baskonus, Haci Mehmet; Sulaiman, Tukur Abdulkadir; Bulut, Hasan
The dynamical systems of soliton propagation through optical fibers for trans-continental and trans-oceanic distances is one of the most interesting areas of study. Optical solitons are restrained electromagnetic waves that stretch in nonlinear dispersive media and allow the intensity to remain unchanged due to the balance between dispersion and nonlinearity effects. In this study, we successfully acquire dark, bright, combined dark–bright, singular and combined singular soliton solutions to the decoupled nonlinear Schrödinger equation arising in dual-core optical fibers by using the extended sinh-Gordon equation expansion method. The constraint conditions for the existence of valid soliton solutions are given. We discuss how change in parameters affect the solitons transmission. We present the 2D, 3D and the contour graphs to some of the reported solutions.
AtıfScopus47OpenAlex48İncele - MakaleAçık Erişim2018Scopus SJRQ2Novel complex and hyperbolic forms to the strain wave equation in microstructured solids
Baskonus, Haci Mehmet; Sulaiman, Tukur Abdulkadir; Bulut, Hasan
This study applies the powerful sine-Gordon expansion method in acquiring some new solutions to the strain wave equation in micro-structured solids arising in mathematical physics. The strain wave equation in micro-structured solids is used in modelling wave propagation in micro-structured materials. We successfully acquire some new solitary wave solutions with hyperbolic function structure. By taking some suitable values of parameters involved in the solutions, we plot the 2D, 3D and contour graphs of all the obtained solutions in this study.
AtıfScopus34WoS34OpenAlex36İncele - MakaleYalnız künye2018Scopus SJRQ2Comparison of Some Soil Fungi in Bioremediation of Herbicide Acetochlor Under Agitated Culture Media
Erguven, Gokhan Onder
In this study, we aimed to find out the biodegradation efficiency of some soil fungi types on herbicide acetochlor with acetochlor active material, chemical oxygen demand (COD), biochemical oxygen demand (BOD5) and total organic carbon (TOC) parameters. We also try to determine the population dynamics of these fungi via turbidity. The fungi cultures were isolated from agricultural field in in Thrace region of Turkey. Each fungi enriched in malt extract broth media and 1 mL of these enriched media was inoculated into 100 mL of acetochlor solutions that suggested for using application concantrations in agricultural field for farmers (11000 mg L−1) for sunflower and corn agriculture. Bioremediation results of acetochlor have shown different results according to the types of fungi. Our results indicate that Tolypocladium geodes and Cordyceps cicadae might be used in acetochlor bioremediation with a significant acetochlor, COD, TOC and BOD5 reduction and can be used for rehabilitation of agricultural fields or receiving environments for removal the opposite effects of acetochlor or other herbicides.
AtıfScopus37WoS26OpenAlex36İncele - MakaleAçık Erişim2018Scopus SJRQ2On the soliton solutions to the Nizhnik-Novikov-Veselov and the Drinfel’d-Sokolov systems
Cattani, Carlo; Sulaiman, Tukur Abdulkadir; Baskonus, Haci Mehmet; Bulut, Hasan
This study investigates the Nizhnik-Novikov-Veselov and the Drinfel’d-Sokolov systems by using the extended sinh-Gordon equation expansion method. The Nizhnik-Novikov-Veselov system is an isotropic Lax extension of the one-dimensional Korteweg-de Vries equation and the Drinfel’d-Sokolov system is a nonlinear model that possesses some special forms of Lax pairs. Topological kink-type, topological, non-topological, compound topological-non-topological bell-type and singular soliton solutions are successfully constructed. Under the choice of suitable values of parameters, the 2D, 3D and contour graphs to some of the obtained solutions are plotted.
AtıfScopus87WoS94OpenAlex101İncele - MakaleAçık Erişim2018Scopus SJRQ2On the bright and singular optical solitons to the (2 + 1)-dimensional NLS and the Hirota equations
Bulut, Hasan; Sulaiman, Tukur Abdulkadir; Baskonus, Haci Mehmet; Aktürk, Tolga
This study constructs bright and singular optical solitons the (2 + 1)-dimensional NLSE and the Hirota equation by utilizing the new sine-Gordon expansion method. The parametric conditions for the existence of valid solitons are given. We give the variations of solitary and periodic wave solutions that depend on the parameters. We present the 2D, 3D and contour graphs to represent the kind of solutions secured in this study.
AtıfScopus40OpenAlex41İncele - MakaleAçık Erişim2018Scopus SJRQ2Complex acoustic gravity wave behaviors to some mathematical models arising in fluid dynamics and nonlinear dispersive media
Bulut, Hasan; Sulaiman, Tukur Abdulkadir; Baskonus, Haci Mehmet; Akturk, Tolga
This study acquires the wave solutions of the two well-known nonlinear models, namely; the modified Benjamin–Bona–Mahony and the coupled Klein–Gordon equations. The modified Benjamin–Bona–Mahony is a nonlinear model that describes the long surface gravity waves of small amplitude and the coupled Klein–Gordon equation describes the quantized version of the relativistic energy–momentum relation. We successfully acquire some new solutions to these models such as kink-type and soliton solutions in complex hyperbolic functions form. We plot the 3D and 2D surface of the all the obtained solutions in this study. The mathematical approach used in this study is the sine-Gordon expansion method.
AtıfScopus33OpenAlex40İncele - MakaleAçık Erişim2017Scopus SJRQ2Novel hyperbolic behaviors to some important models arising in quantum science
Bulut, Hasan; Sulaiman, Tukur Abdulkadir; Baskonus, Haci Mehmet; Yazgan, Tugba
In this study, with the help of Wolfram Mathematica 9 software, the powerful sine-Gordon expansion method is used in constructing new hyperbolic function solutions to the two well known nonlinear differential equations that arise in the field of nonlinear sciences, namely; the modified Zakharov–Kuznetsov and the (2+1)-dimensional cubic Klein–Gordon equations. We also plot the two- and three-dimensional graphics of all the obtained solutions in this paper by utilizing the same program in the Wolfram Mathematica 9 software.
AtıfScopus17WoS18OpenAlex19İncele - MakaleYalnız künye2017Scopus SJRQ2Effect of Cobalt on Sperm Motility in an Endangered Trout Species, Salmo coruhensis
Kocabaş, Mehmet; Kutluyer, Filiz
Experiments were designed to examine the in vitro effect of cobalt on sperm motility of the endangered trout species (Salmo coruhensis). Sperm samples were diluted in an immobilizing solution, and activated in a motility-activation solution that was supplemented with cobalt at concentrations of 1, 10, 100 and 1000 mg/L. The percentage of motile sperm and duration of motility were determined. Cobalt concentrations of 1–100 mg/L had a positive effect on the percentage of motile sperm and duration of motility compared to the control group, while a concentration of 1000 mg/L resulted in decreases in these parameters (p < 0.05). The percentages of motile sperm at cobalt concentrations of 0, 1, 10, 100 and 1000 mg/L were 83.33% ± 0.25%, 88.33% ± 0.34%, 89.00% ± 0.57%, 90.00% ± 0.87% and 42.50% ± 0.45%, respectively; and the time durations over which the sperm remained motile were 72.00 ± 0.63, 74.83 ± 0.28, 77.40 ± 0.47, 81.14 ± 0.78, and 50.25 ± 0.67 s, respectively. This study has shown that sperm motility and duration were significantly enhanced (p < 0.05) at cobalt concentrations of 1, 10 and 100 mg/L, relative to controls, and significantly decreased at 1000 mg/L.
AtıfScopus11WoS9OpenAlex14İncele - MakaleYalnız künye2017Scopus SJRQ2The effect and characterization of newly synthesized SrBr2 reinforced bone grafts on structure and cell viability
Demirel, Mehtap; Aksakal, Bünyamin; Kaya, Ali İhsan
Abstract: In this study, a highly durable SrBr2 compound was added to Ca(NO3)2·4H2O, KOH, NaNO3, P2O5, and urea (CO(NH2)2) compounds at different ratios (wt 10–30%); biografts were synthesized in different compositions using the sol gel method They were characterized using X-ray diffraction, Fourier transform infrared spectrometer, scanning electron microscope, and mechanical tests e.g. hardness and compression. Structural, mechanical properties and cell viabilities of the synthesized biografts were comparatively examined. Fourier transform infrared spectrometer and X-ray diffraction analysis results showed that, including SrBr2, hydroxyapatite had formed in the biografts. Also, hardness and compression tests revealed that compressive stress and hardness values of the grafts increased as the amount of SrBr2 increased. The cell viability ratios also enhanced with the amount of SrBr2 increased in the synthesized biografts. Graphical Abstract: [InlineMediaObject not available: see fulltext.]
AtıfScopus2WoS2OpenAlex3İncele - MakaleYalnız künye2017Scopus SJRQ2Novel archetypes of new coupled Konno–Oono equation by using sine–Gordon expansion method
Yel, Gülnur; Baskonus, Haci Mehmet; Bulut, Hasan
In this manuscript, we investigate the analytical solutions of the new coupled Konno–Oono equation by using the sine–Gordon expansion method. We successfully obtained some new soliton solutions to this model. We plot the 2D and 3D surfaces of all the found soliton solutions in this study. The Wolfram Mathematica 9 is used in performing all the computations in this study.
AtıfScopus99WoS93İncele - MakaleAçık Erişim2017Scopus SJRQ2Optimization of an Analytical Method for Determination of Pyrene in Smoked Meat Products
Ince, Muharrem; Kaplan Ince, Olcay; Yaman, Mehmet
In the present study, an analytical method was optimized for determination of pyrene by solid-phase extraction in Turkish foodstuffs including chicken and grilled meat samples. In accordance with this purpose, all of the parameters that may affect the signal of pyrene during analysis processes were optimized using high-performance liquid chromatography–mass spectrometry system. The optimized parameters for column temperature, injection volume, mobile-phase flow rate, and fragmentor potential were found to be 45 °C, 60 μL, 0.6 mL min−1, and 130 V, respectively. The optimized high-performance liquid chromatography–mass spectrometry method was applied for the determination and evaluation of pyrene in food samples that include chicken and grilled meat. The pyrene amount in meat samples was obtained in the range from 2.3 to 4.4 μg kg−1 for the normal grilled meat and chicken samples and from 12 to 135 μg kg−1 for exceedingly grilled samples. The results show that the concentration of pyrene is significantly dependent on the type of meat sample and cooking source. The limit of detection and quantitation was found to be 0.5 μg L−1 and 1.53 μg L−1, respectively.
AtıfScopus5WoS5OpenAlex7İncele - MakaleAçık Erişim2016Scopus SJRQ2New solitary and optical wave structures to the Korteweg–de Vries equation with dual-power law nonlinearity
Bulut, Hasan; Sulaiman, Tukur Abdulkadir; Baskonus, Haci Mehmet
In this manuscript, we apply the powerful sine-Gordon expansion method to the Korteweg–de Vries (KdV) equation with dual-power law nonlinearity. The method is a combination of the travelling wave transformation and sine-Gordon equation. We find some new complex solitary and optical wave solution structures to the KdV equation with dual-power law nonlinearity. Wolfram Mathematica 9 is used in carrying out all the computations and the graphics plot in this paper. We have finally submit a comprehensive conclusion.
AtıfScopus63WoS61OpenAlex77İncele - DergiJournal of Sol-Gel Science and Technology