Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Dertli, Enes(17)
- Şahin, Engin(8)
- Bayram, Ozkan(7)
- Esmer, Yusuf(7)
- Degirmenci, Yavuz(6)
- Yilmaz, Mustafa Tahsin(6)
- Dursunoğlu, İsmail(5)
- Göktaş, Bora(5)
- İspirli, Hümeyra(5)
- Şenay, Volkan(5)
- Bulut, Mehmet(4)
- Can, Zehra(4)
- Kaban, Güzin(4)
- Korkmaz, Özge(4)
- Pabuçcu, Hakan(4)
- Sagdic, Osman(4)
- Sefali, Abdurrahman(4)
- Serencam, Hüseyin(4)
- Simsek, Onder(4)
- Taylan, Osman(4)
- Ag, Aliriza(3)
- Bayraktar, Bülent(3)
- Bulut, Ayhan(3)
- Cuce, Erdem(3)
- Dayi, Faruk(3)
- Durmaz, Atakan(3)
- Gökçe, H. Süleyman(3)
- Küçük Demir, Betül(3)
- Mavi, Ahmet(3)
- Ucan, Izzet(3)
- Uçurum, Metin(3)
- Özen, Soner(3)
- Öztürk, Mesut(3)
- Abdioglu, M.(2)
- Acar, Adalet(2)
- Agirman Aydin, Tuba(2)
- Akay, Ebru Çağlayan(2)
- Akkan, Yaşar(2)
- Akkoyunlu, Ebubekir(2)
- Akkuş, Ömer(2)
Yayınlar
- MakaleYalnız künye2019Scopus SJRQ4Comparison of cationic dyes (basic orange 2, basic yellow 2 and basic violet 3) removal from aqueous solution using clay as an adsorbent
Farizoglu, Burhanettin; Fil, Baybars Ali; Sozudogru, Onur; Aladag, Erdinc; Kul, Sinan
The present work aims to investigate the removal of three cationic dyes (Basic Orange 2, Basic Yellow 2 and Basic Violet 3) from aqueous solutions by montmorillonite under various experimental conditions. Cationic dyes were selected Basic Orange 2 (BO2), Basic Yellow 2 (BY2) and Basic Violet 3 (BV3). The effects of pH, initial dye concentration, adsorbent dose, agitation speed and ionic strength, on the removal of dyes were studied. According to the experiments results, it was shown, that maximum removal was achieved in less than 45 min. The results indicate that the montmorillonite can be used as a low cost alternative according to other adsorbents in the removal of dyes from wastewater. The maximum adsorption efficiency levels attained were as follows: 95.849% BO2, 99.562% BY2 and 99.169% BV3 onto montmorillonite at pH: 5.0, 100 mg/L initial dye concentration, 0.75g/L clay dosage, 300 rpm agitation speed, 0 M NaCl ionic strength and 293 K, reaction time of 45 min.
AtıfScopus2
İncele - MakaleAçık Erişim2019Scopus SJRQ3A signal timing assignment proposal for urban multi lane signalised roundabouts
Murat, Yetis Sazi; Cakici, Ziya; Tian, Zong
The relationship between the left-turning traffic volume and the storage area at signalised roundabouts is investigated, and a calculation procedure for signal timing is proposed in this paper. The parameters associated with the developing stages of a new expression/ model are also defined. Four different signal timing scenarios are considered. The results show that the proposed formula can be used for the design of signalised roundabouts.
AtıfScopus11WoS7OpenAlex9
İncele - MakaleYalnız künye2019Scopus SJRQ1Vertically oriented graphene nano-sheets grown by plasma enhanced chemical vapor deposition technique at low temperature
Bayram, Ozkan; Simsek, Onder
In this study, it was aimed to obtain vertically-oriented graphene nano-sheets (VGNs) on copper foils using CH 4 gas as the precursor material by means of plasma enhanced chemical vapor deposition (PECVD) technique. VGNs were obtained at 50 W, 75 W and 100 W Radio Frequency (RF) powers by this technique and the effect of RF power on the morphological structure of graphene layers was investigated. VGNs were also analyzed by Raman spectroscopy, scanning electron microscopy (SEM) and water contact angle (WCA) measurements. The SEM images showed that the VGNs became more tightly packed with the increase of RF power and thus these coating parameters had a significant effect on the morphological structure. WCA analyzes for VGNs were also performed and it was found that VGNs obtained at 100 W RF power had higher contact angle value than the other RF powers. These VGNs, which have both large surface area and optically transparent, are thought to be materials that have the potential to be used in supercapacitors and solar cells.
AtıfScopus19WoS17OpenAlex19İncele - MakaleYalnız künye2019Scopus SJRQ4Fatty acid composition of sunflower seeds from different locations in the north of Turkey
Gul, Volkan
Because of sunflower is well adapted to the conditions of all region types, it ranks the first in terms of vegetable oil production in our country. The content of fatty acids that determine the quality of sunflower oil is affected by factors such as genotype and environment, especially climate and soil struc-ture. This research examines the oil and fatty acid ratios of sunflower grains grown on a producer basis and presented to the market in 2015 in Samsun (Bafra, Vezirkopru and Havza), Amasya (Merzifon), Corum (Center) and Tokat (Turhal) in the Middle Black Sea Region selected according to the density of oil sunflower to determine the quality of oil. According to the results of the research, average fat ratio was found to be between 41.57% and 45.67%, palmitic and stearic acids, which are basic saturated fatty acids, between 5.65% and 6.44% and from 3.84% and 4.81% linoleic acid (omega 6), linolenic acid (omega 3) and oleic acids (omega 9), which are unsaturated fatty acids, were found between 50.33 and 63.42%, 0.24 and 0.29% and 25.32 and 37.50%, respectively. These results indicate that the sun-flower seeds cultivated in the Amasya-Merzifon re-gion are at the forefront due to their oil quality char- A cteristics.
- MakaleYalnız künye2019Scopus SJRQ3Response surface methodology as optimization strategy for asymmetric bioreduction of acetophenone using whole cell of Lactobacillus senmaizukei
Çolak, Nida Sezin; Şahin, Engin; Dertli, Enes; Yilmaz, Mustafa Tahsin; Taylan, Osman
Whole cell applications are one of the main methodologies for the bioreduction of prochiral ketones to obtain enantiomerically rich chiral secondary alcohols which are mainly affected by the culture parameters of the whole cell. In this study, whole cell of Lactobacillus senmaizukei as a safe Lactic Acid Bacteria (LAB) was used for the reduction of acetophenone and Response Surface Methodology (RSM) application was used to optimize the culture parameters in terms of temperature, pH, incubation time, and agitation level to obtain the highest enantiomeric excess (ee) and conversion rate. The predicted optimum conditions for the bioreduction with whole cell Lactobacillus senmaizukei were found to be pH of 5.25, temperature of 25 °C, incubation time of 72 hr, and agitation level of 100 rpm. Importantly, the efficiency of the reduction of the acetophenone was significantly affected by the linear and quadratic effects of culture parameters. These findings are important to show the role of culture parameters for the bioreduction reactions and also the efficiency of the RSM technique to optimize these parameters.
AtıfScopus10WoS10OpenAlex11
İncele - MakaleAçık Erişim2019Scopus SJRQ3Examination of prospective teachers' perceptions of homeland: A phenomenological study
Degirmenci, Yavuz
Homeland can be described as the territory in which people who are bound to each other with several ties and have common values. It's one of the most valuable heritages which has been left to us from former generations, and will be transformed to future generations. There are great responsibilities on us, families, education and especially our teachers as an important elements of education to protect and transfer it to future generations. The reason is that patriotism begins in the family and continues in educational environments. An examination of the renewed primary and secondary education programs in terms of general objectives and contents revealed that there is a conscious effort for children to gain such values as consciousness and love for the homeland, and patriotism in especially social sciences and geography classes. Therefore, perceptions of prospective teachers regarding homeland, who will raise future generations, are important. The purpose of this research is to study perceptions of prospective teachers regarding the concept of homeland. The population of the study consists of 157 prospective classroom teachers, 98 of whom are females and 59 males, who were being educated in three different departments (social studies, Turkish and classroom teaching) in the Fall semester of 2018-2019 Academic Year. Phenomenology, a qualitative research method, has been employed in the research. The data collected were analyzed by the technique of content analysis. According to the findings of the research, the prospective social studies teachers came up with 28, prospective classroom teachers came up with 27 and prospective Turkish teachers came up with 28 valid metaphors about the concept of homeland, which makes a total of 83 different metaphors. In addition, the participants' most preferred metaphors about the concept were the metaphors of mother, home, family, house and earth.
AtıfScopus4OpenAlex2TR Dizin4
İncele - MakaleAçık Erişim2019Scopus SJRQ2Employment of emergency advanced nurses of Turkey: A discrete-event simulation application
Atalan, Abdulkadir; Donmez, Cem Cagri
In the present study, problems in emergency services (ESs) were dealt with by analyzing the working system of ESs in Turkey. The purpose of this study was to reduce the waiting times spent in hospitals by employing advanced nurses (ANs) to treat patients who are not urgent, or who may be treated as outpatients in ESs. By applying discrete-event simulation on a 1/24 (daily) and 7/24 (weekly) basis, and by employing ANs, it was determined that the number of patients that were treated increased by 26.71% on a 1/24 basis, and by 15.13% on a 7/24 basis. The waiting time that was spent from the admission to the ES until the treatment time decreased by 38.67% on a 1/24 basis and 53.66% on a 24/7 basis. Similarly, the length of stay was reduced from 82.46 min to 53.97 min in the ES. Among the findings, it was observed that the efficiency rate of the resources was balanced by the employment of ANs, although it was not possible to obtain sufficient efficiency from the resources used in the ESs prior to the present study.
AtıfScopus9WoS8OpenAlex13İncele - MakaleAçık Erişim2019Scopus SJRQ3Yogurt ice cream sweetened with sucrose, stevia and honey: Some quality and thermal properties
Arslaner, Ayla; Salik, Mehmet Ali; Özdemir, Salih; Akköse, Ahmet
This study investigated the effects of some sweeteners (sucrose, honey and stevia) on the quality and thermal properties of plain (P) and cocoa (C) yogurt ice cream. For this purpose, six different yogurt ice cream samples were prepared with sucrose (control: AP, AC), with honey (BP, BC) and with stevia (CP, CC). The highest values of protein, ash, fat, lactose ratios and lightness (L∗) were measured in samples with stevia. The addition of honey increased the b∗values. The addition of cocoa increased pH and viscosity, but decreased overrun ratios. Although the addition of stevia reduced the lactic acid bacteria (LAB) counts, in all samples the LAB count was above 6 log CFU/g during storage. Results of the thermal and melting analysis showed that the use of stevia had a positive effect on the ice cream stability by increasing the freezing and melting point peak temperatures (Tf, Tm), the enthalpy (ΔHf, ΔHm), and the initial ice crystal melting temperatures (T'm).
AtıfScopus18WoS14OpenAlex16İncele - MakaleYalnız künye2019Scopus SJRQ3Effects of autochthonous Lactobacillus plantarum strains on Listeria monocytogenes in sucuk during ripening
Kamiloğlu, Aybike; Kaban, Güzin; Kaya, Mükerrem
The aim of this study was to investigate the effects of autochthonous Lactobacillus plantarum strains (S50, S51, S72, S74, and S85) as starter cultures on growth of Listeria monocytogenes in sucuk (Turkish dry fermented sausage) production. The counts of L. monocytogenes, lactic acid bacteria, and Enterobacteriaceae as well as pH value and moisture content were determined in sucuk during ripening period. L. monocytogenes, lactic acid bacteria, and pH value were significantly affected (p < 0.01) by both starter culture and ripening period. A slight increase in L. monocytogenes count was observed in the control group whereas a reduction was observed in samples produced with L. plantarum strains at the first day of fermentation. Although L. monocytogenes reduction in control group with spontaneous microbiota was 0.54 log cfu/g after 11 days of ripening, reductions of as high as 2.74 log cfu/g was observed in the presence of L. plantarum S50. Practical applications: In the current study, five different autochthonous Lactobacillus plantarum isolates were identified, the effects of these strains on the behavior of Listeria monocytogenes in Turkish fermented sausage (sucuk) were determined. To the best of our knowledge, this is the first report investigating the effects of autochthonous lactic acid bacteria strains on behavior of L. monocytogenes in sucuk fermentation. As starter culture autochthonous lactic acid bacteria can be more competitive than commercial types. Our findings reveal the importance of the use of these autochthonous L. plantarum strains causes rapid pH drop to inhibit L. monocytogenes growth during sucuk fermentation. And also L. plantarum S50 strain may be more suitable for use as bioprotective culture or starter culture compared to other strains.
AtıfScopus27WoS24İncele - MakaleAçık Erişim2019Scopus SJRQ2Uniform boundedness of kantorovich operators in variable exponent Lebesgue spaces
Ayazoglu, Rabil; Akbulut, Sezgin; Akkoyunlu, Ebubekir
In this paper, the Kantorovich operators Kn, n ϵ N are shown to be uniformly bounded in variable exponent Lebesgue spaces on the closed interval [0, 1]. Also an upper estimate is obtained for the difference Kn (f) − f for functions f of regularity of order 1 and 2 measured in variable exponent Lebesgue spaces, which is of interest on its own and can be applied to other problems related to the Kantorovich operators.
AtıfScopus3WoS3OpenAlex3İncele - MakaleAçık Erişim2019Scopus SJRQ3Plasma polymerized linalool (ppLin): An antimicrobial and biocompatible coating
Çakmak, Kenan; Bayram, Özkan; Solak, Kübra; Kaban, Güzin; Şimşek, Önder; Mavi, Ahmet
Bacterial infections in medical devices and drug resistance of bacteria can cause chaos in the world due to loss of lives in addition to the cost of device revisions, quarantine, disinfection of infected areas, and patient treatment. Antibacterial coatings of essential oils on medical devices can prevent bacterial attachment and reduce costs. Linalool is an antibacterial constituent of essential oils. Herein, we examine for the first time the fabrication and characterization of radio frequency (RF) plasma polymerized hydrophilic thin films from linalool (ppLin) by varying deposition parameters (RF power and deposition time) and the behavior of ppLin with two bacteria (Escherichia coli and Staphylococcus aureus) commonly related to microbial contamination of medical devices. While a dramatic reduction in E. coli and S. aureus attachment was observed on ppLin films, their hydrophilic surface was also bactericidal to S. aureus. Additionally, ppLin films were shown to be adherent and noncytotoxic to human fibroblast cells. ppLin can be potentially integrated into medical and other clinical devices as a promising low-cost biocompatible antimicrobial coating.
AtıfScopus8WoS8İncele - Kitap BölümüYalnız künye2019Industry 4.0 and energy politics
Boz, Fusun Celebi
- MakaleAçık Erişim2019Scopus SJRQ4Investigation of the relationship between the self-confidence and motivation of high school students participating school sport contests
Toktas, Sermet; Bas, Mustafa
The purpose of this study is to examine the relationships between the levels of self-confidence and motivation of high school students participating sport contests at school and the various demographic variables (gender, high school type, sport age, sports branch and sport category). In the study, survey model, which is frequently used in descriptive research method is used. The population of the study consisted of students who studied at high schools and those who attended contests in Adıyaman, while sample consisted of 856 athletes, 39% of whom were female students (334) and 61% (522) of whom were male students. To collect data for the study, personal data form, ''Motivation in Sport'' scale, which was developed by Pelletier et al. (1995) and adapted to Turkish by Pelletier et al. and ''Self-confidence'' scale developed by Akın (2007) were used. SPSS 21.00 package program was used for data analysis. Multiple regression analysis, Pearson product-moment correlation co-efficient technique, independent t-test and one-way analysis of variance were performed in the quantitative data of the research. According to the findings obtained from the study, it was determined that there was a significant relationship between demographic information and self-confidence and motivation levels. While there was a significant difference in gender self-confidence level with intrinsic and extrinsic self-confidence and high school type sports branch, there was no significant difference between sport age and sport category. A significant relationship was found between the sub-dimension of non-motivation, intrinsic motivation and extrinsic motivation, and there was no significant relationship with other independent variables such as gender, sports branch, sport category and sport age. Based on these results, it is recommended that secondary school students participate in sports competitions to have some elements that may have positive effects on their self-confidence and motivation.
AtıfScopus5OpenAlex14İncele - MakaleAçık Erişim2019Scopus SJRQ2The role of cobalt doping on the optical and structural properties of Mn 3 O 4 nanostructured thin films obtained by SILAR technique
Bayram, Ozkan; İgman, Erdal; Guney, Harun; Simsek, Onder
Cobalt doped manganese oxide thin films (Mn 3 O 4 :Co) were successfully deposited on soda lime glass substrates using SILAR technique. Mn 3 O 4 :Co thin films were characterized using XRD, SEM, Uv–VIS and Raman spectroscopy. The XRD spectra showed that thin films had substantially Hausmannite crystal structure. The preferential orientation of the pure and 0.5 at.% Co doped manganese oxide thin films (Mn 3 O 4 ) was (002), but with increasing Co doping, it was detected that this preferential orientation shift towards the (211) plane. The absorbance, transmittance and optical band gap of the Mn 3 O 4 :Co thin films were determined using Uv–Vis spectroscopy and these properties of the thin films differed considerably due to cobalt doping. The optical band gap of pure Mn 3 O 4 thin films was 2.00 eV, but on the other hand, due to the Co doping this value increased before and then decreased slightly. Optical transmittance of Mn 3 O 4 :Co films increased from 60% to 72% with the effect of Co doping. A1g mode, which is the characteristic vibration peak of Mn 3 O 4 films, was confirmed for pure and doped Mn 3 O 4 thin films at a wavelength of 658 nm.
AtıfScopus26WoS24OpenAlex25İncele - MakaleAçık Erişim2019The effect of VR and traditional videos on learner retention and decision making
Yildirim, Gurkan; Yildirim, Serkan; Dolgunsoz, Emrah
Virtual reality (VR) as computer-mediated 3-D environments including real-life situations presented via different tools in which users can interact effectively with visuals. This study is significant as it primarily aimed to investigate effects of VR on retention by comparing it with traditional 2-D videos. The main aim of this study is to compare the effect of VR and 2-D videos on learner retention and decision making. About 18 students from the Department of English language teaching in an age range of 18-20 (nine males and nine females) voluntarily participated in this study and took course credits. As all participants were tested under the same two conditions in different time periods; repeated measures were chosen for statistical analysis. It can be inferred that both technologies have similar effects on short-term retention and VR does not provide any extra retention performance. However, VR was found to have a significant effect on long-term retention.
AtıfScopus18İncele - MakaleAçık Erişim2019Scopus SJRQ3An explicit characterization of spherical curves according to Bishop frame and an approximately solution
Balki Okullu, Pinar; Kocayigit, Huseyin; Agirman Aydin, Tuba
In this paper, spherical curves are studied by using Bishop frame. First, the differential equation characterizing the spherical curves is given. Then, we exhibit that the position vector of a curve which is lying on a sphere satisfies a third-order linear differential equation. Then we solve this linear differential equation by using Bernstein series solution method.
AtıfScopus2OpenAlex1İncele - MakaleAçık Erişim2019Scopus SJRQ3Modeling of the impact of initial mold temperature, Al5Ti1B and Al10Sr additions on the critical fraction of solid in die casting of aluminum alloys using fuzzy expert system
Teke, Ç.; Çolak, M.; Taş, M.; İpek, M.
In the casting of liquid metal, the feeding stops when the mushy zone is clogged and does not allow the transfer of feeding liquid. The growing resistance of the solid dendrites against the fluidity of the feeding liquid is defined as the critical fraction of solid (CFS). CFS value varies depending on many factors such as alloy solidification range, initial mold temperature, and the grain size. Therefore, in many casting simulation applications, it is quite common to get inconsistent results due to insufficient information about the CFS. In this study, a fuzzy expert system (FES) model has been developed in order to determine the value of the CFS in the die casting process, based on the parameters of the alloy type, the initial mold temperature, Al5Ti1B addition and Al10Sr addition. In order to create the rule base for the FES model, 54 die casting experiments have been carried out. The CFS values obtained using the FES model has revealed that the developed model of the FES predicts the CFS value in a high performance.
AtıfScopus4WoS3OpenAlex6İncele - MakaleAçık Erişim2019Scopus SJRQ2Comparison of colony performances of honeybee (Apis Mellifera L.) housed in hives made of different materials
Erdoğan, Yaşar
Numerous flowering plants rely on bees for pollination. Any natural or anthropogenic factor that threatens colony survival can have a large impact on plant production. This study investigates the effects of manmade hives built from different materials and how these may influence colony growth. Ten each of three hive types were selected, wooden, polystyrene and composite insulated hives. Factors of adult bee numbers, brood development, nectar flow period weight gain, bee flight activity, aggression response, and honey yield were selected markers of hive development. Statistically, each hive type produced significant variation (p<.05). The greatest overall productivity across all factors was for insulated hives made of composite material, with honey production approximately 35% times that of wood, 14% times that of polystyrene and in terms of the development of honeybee colonies, the average of other hives is 10.2 times.Highlights Relative humidity and temperature are important environmental factors for honeybees. Insulated hives, increased honey yield. High temperature and humidity inside the hive made honeybees more aggressive.
AtıfScopus12WoS6OpenAlex14İncele - MakaleYalnız künye2019Scopus SJRQ2Leaded brass alloys for gamma-ray shielding applications
Şakar, Erdem; Büyükyıldız, Mehmet; Alım, Bünyamin; Şakar, Betül Ceviz; Kurudirek, Murat
The leaded brasses show high machinability and atmospheric corrosion resistance. Hence, they are being used in different applications such as machine parts, valves, fittings etc. Besides, they can serve as radiation shields as they contain lead and their radiation shielding properties were not investigated so far. Thus, the aim of this study is to determine the radiation shielding properties of leaded brasses. Standard (CuZn) and leaded (CuZnPb) brasses were prepared and their mass attenuation coefficients (μ/ρ), half-value layers (HVL), tenth-value layers (TVL), mean free paths (MFP) and effective atomic numbers (Z eff ) were determined. Linear attenuation coefficients (μ) of the alloys were measured first at 53, 276, 302, 356 and 383 keV using a HPGe detector and a 133 Ba radioactive source. These values were then used to obtain other parameters. A good agreement was observed between experimental and theoretical results for HVL, TVL and MFP (Dif. ≤ 9%). Photon buildup through the present materials was studied in terms of exposure buildup factor (EBF). Results were presented and discussed regarding the photon energy and penetration depths. Fast neutron removal cross sections were also calculated for the given alloys. Some alloys were also evaluated morphologically by using EDX mapping. The leaded brasses were compared with standard shielding concretes and superior shielding properties against gammas and fast neutrons were obtained when compared with concretes.
AtıfScopus114WoS108OpenAlex128İncele - MakaleYalnız künye2019Scopus SJRQ4Evaluating the grinding process of granitic rocks using the physico-mechanical and mineralogical properties
Kahraman, Sair; Ucurum, Metin; Yogurtcuoglu, Emine; Fener, Mustafa
Granitic rocks are sometimes ground for different purposes. Predicting the mean particle size (d50) is useful for planning and cost estimation of purposes. In order to investigate the possibility of predicting the d50 of ground rock from the physico-mechanical rock properties, six different granites were tested in the laboratory. First, the d50 values were correlated with the corresponding physico-mechanical properties. The simple regression analysis showed that there were no good correlations between the d50 and the physico-mechanical properties. Then, the multiple regression analysis was carried out and strong prediction equations were developed. It was also shown that the dominant parameter in grinding was the abrasive mineral content of rock. It is concluded that the d50 of granites can be predicted from the derived multiple regression equations especially for preliminary investigations. The developed estimation equations including index test values are especially useful since they are easy to use.
AtıfScopus2WoS1İncele