Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Korkmaz, Şadan(9)
- Pat, Suat(9)
- Özen, Soner(9)
- Şenay, Volkan(9)
- Cuce, Erdem(8)
- Dertli, Enes(8)
- Karaali, Rabi(6)
- Akdemir, A.O.(5)
- Dadasoglu, F.(5)
- Ekinci, A.(5)
- Han, I.(5)
- Karagoz, K.(5)
- Korkmaz, Özge(5)
- Oztekin, A.(5)
- Set, E.(5)
- Cuce, Pinar Mert(4)
- Erdem, O.(4)
- Saricaoglu, Furkan Turker(4)
- Tosun, Figen Çam(4)
- Şahin, Engin(4)
- Aksakal, Vecihi(3)
- Allm, Bünyamin(3)
- Bayram, Bora(3)
- Elcik, Harun(3)
- Erdoğan, Yaşar(3)
- Karcıoğlu, Reşat(3)
- Kurnaz, Ersin(3)
- Liu, Peide(3)
- Sarikaya, İsmail(3)
- Turhan, Sadettin(3)
- Uçurum, Metin(3)
- Yilmaz, Mustafa Tahsin(3)
- Yudar, H. Hakan(3)
- Öztürk, Mesut(3)
- Şahin, Rıdvan(3)
- Abdioglu, M.(2)
- Abuşoǧlu, A.(2)
- Ag, Aliriza(2)
- Agar, Guleray(2)
- Akkuş, Tuba(2)
Yayınlar
- BildiriAçık Erişim2017Scopus SJRQ1Nanoemulsion-based delivery systems to improve functionality of oregano essential oil: Molecular characterization and in vitro antifungal activity
Ermis, Ertan; Cicek, Perihan Kubra; Meral, Raciye; Yilmaz, Azime; Dertli, Enes; Yilmaz, Mustafa Tahsin
AtıfWoS1OpenAlex1
İncele - MakaleAçık Erişim2017Scopus SJRQ3Enhanced Pinning Properties of Laser-Irradiated Bulk MgB2 Superconductors
Erdem, O.; Yanmaz, E.
In order to investigate the effect of laser irradiation on the superconducting properties of MgB2, a pellet-shaped sample was produced and cut into two pieces. The dot-shaped molten patterns, with the distance of 100 µm between them, were formed on the surface of one of the pieces by using an Nd:YVO4 laser. The grains of the irradiated sample were significantly grown due to the laser-induced sintering. The modified surface appeared to have dense and compacted grains as a result of increasing interconnectivity among the superconducting grains. The critical current densities at 5 K in a field of 3 T were found to be 5.38 × 104 and 8.96 × 104 A cm−2 for the reference and the irradiated samples, respectively. The increment of critical current density for the irradiated sample is presumably connected with the changing of pinning mechanism after the laser irradiation. For the irradiated sample which showed a higher value of critical current density at 5 K under high fields, Δκ pinning was obtained as a dominant pinning mechanism, while the normal point pinning was dominant for the reference one. These results point out that the superconducting properties of bulk MgB2 can be changed and improved via laser irradiation in a short time.
AtıfScopus12WoS10OpenAlex11
İncele - BildiriYalnız künye2017Multi-manned assembly line balancing problem: Resource constrained case
Yilmaz, Hamid; Yilmaz, Mustafa
In this paper, a new approach on multi-manned assembly line balancing problem is presented. The goal of proposed approach is to establish balance of multi-manned assembly line with minimum number of worker, workstation and resources. For this purpose, mathematical model is developed for the problem. Finally, this model is solved for a numerical example using Gurobi to indicate the applicability of the proposed mathematical model.
AtıfScopus1İncele - MakaleAçık Erişim2017Scopus SJRQ3Comparison of wintering ability and colony performances of different honeybee (Apis mellifera L.) genotypes in eastern Anatolian/turkey conditions; [Doğu anadolu-Türkiye koşullarinda farklı bal arısı (Apis mellifera L.) genotiplerinin kışlama yeteneği ve koloni performanslarinin karşılaştırılması]
Cengiz, Mahir Murat; Erdoğan, Yaşar
In this study, wintering ability and some physiological properties of Buckfast, Carniolan, Caucasian and Erzurum honeybee genotypes were investigated in Eastern Anatolian conditions. During the wintering season of 2014, a total of 48 colonies, 12 from each of Buckfast, Carniolan, Caucasian and Erzurum honey bee genotypes, were taken from the equilibrated colonies of Langstroth type wooden hives for wintering. In the 2015 production period, a total of 43 colonies,11 from each of Buckfast, Carniolan, Erzurum genotypes and 10 from Caucasian genotype were used in the study. In the production season, the average number of combs covered with bees in genotype groups were found as 11.72±0.63, 12.17±0.62, 9.52±0.51 and 10.72±0.55 per colony, and the average brood areas were found as 2713.7±237.9, 2797.6±238.3, 2036.5±166.4, 2364.3±197.2 cm2/colony (19.04.2015-4.10.2015). The difference between the groups was found statistically significant (P<0.01) in terms of number of combs covered with bees and brood areas. Averarage honey yields were determined as 28.08±2.37, 29.94±2.17, 19.28±2.13 and 23.36±2.15 kg/colony, respectively. The difference between groups in honey yield was found statistically significant (P<0.05).
AtıfScopus9WoS5OpenAlex8İncele - MakaleYalnız künye2017Scopus SJRQ1Microbial diversity of traditional kefir grains and their role on kefir aroma
Dertli, Enes; Çon, Ahmet Hilmi
Kefir grains consist of rich bacterial and fungal microflora responsible for the production of this traditional fermented milk beverage with unique flavour properties. Here, a pyrosequencing approach was applied for the identification of microbial flora of four kefir grains collected from different regions of Turkey and the volatile compounds in kefir samples produced with these grains were determined. Lactobacillus kefiranofaciens presented in all grains at important levels and Enterobacter, Acinetobacter, Enterococcus and Pseudomonas spp. were observed in traditional kefir grains. The fungal microflora of kefir grains was dominated by yeast species and Dipodascaceae family was dominant and Saccharomyces cerevisiae presented in all grains. Other yeast species belonging to Kazachstania, Candida, Issatchenkia and Rhodotorula species were also detected in kefir grains. Volatile compounds of kefir samples were also diverse related to the microbial diversity of kefir grains. This study revealed the rich microflora of Turkish kefir grains and their interactions with the aromatic properties of kefir.
AtıfScopus143WoS130OpenAlex174İncele - MakaleYalnız künye2017Scopus SJRQ3Performance analyses of gas turbine cogeneration plants
Karaali, Rabi; Oztürk, Ilhan Tekin
In this study, some improving methods of gas turbine cogeneration cycles are applied on a simple cogeneration cycle. These methods are preheating air, preheating air and fuel, inlet air cooling by using evaporative cooling and absorption cooling. These cogeneration systems are evaluated with respect to energy efficiency (energy utilization factor), exergetic efficiency, electric and heat power, electric-heat energy rate, artificial thermal efficiency and fuel energy saving ratio and are compared with each other. In these analyses, the thermodynamic parameters such as compressing ratio, air and fuel mass ratio and compressor inlet temperatures of the cycles are used. It is concluded that these parameters can be listed from most effective to least effective as air fuel ratio, pressure ratio and compressor inlet temperature. It is also concluded that the most efficient cycle is found to be the air-fuel preheated cycle for obtaining more electric power and less heat power, and the simple cycle is the most suitable one for obtaining more heat power and less electric power.
AtıfScopus6İncele - MakaleAçık Erişim2017Scopus SJRQ3Possibility-induced simplified neutrosophic aggregation operators and their application to multi-criteria group decision-making
Şahin, Rıdvan; Liu, Peide
Simplified neutrosophic set (SNS) is an appropriate tool used to express the incompleteness, indeterminacy and uncertainty of the evaluation objects in decision-making process. In this study, we define the concept of possibility SNS including two types of information such as the neutrosophic performance provided from the evaluation objects and its possibility degree using a value ranging from zero to one. Then by extending the existing neutrosophic information, aggregation models for SNSs that cannot be used effectively to fusion the two different information described above, we propose two novel neutrosophic aggregation operators considering possibility, which are named as a possibility-induced simplified neutrosophic weighted arithmetic averaging operator and possibility-induced simplified neutrosophic weighted geometric averaging operator, and discuss their properties. Moreover, we develop a useful method based on the proposed aggregation operators for solving a multi-criteria group decision-making problem with the possibility simplified neutrosophic information, in which the weights of decision-makers and decision criteria are calculated based on entropy measure. Finally, a practical example is utilised to show the practicality and effectiveness of the proposed method.
AtıfScopus32WoS28OpenAlex33İncele - MakaleAçık Erişim2017Scopus SJRQ2Functional and Film-forming Properties of Mechanically Deboned Chicken Meat Proteins
Saricaoglu, Furkan Turker; Turhan, Sadettin
In the present study, the functional properties of mechanically deboned chicken meat proteins (MDCM-Ps) were determined at different pH (2, 4, 6, 8 and 12), and film-forming properties were evaluated depending on MDCM-P (2, 3 and 4%) and glycerol (30, 40 and 50%) concentrations. The highest solubility, emulsifying and foaming properties were determined at pH 12. MDCM-P solutions showed non-polyelectrolyte behavior and gelation onset temperature was determined at 36°C. Film-forming properties of MDCM-P showed that the tensile strength decreased, and elongation at break increased as glycerol concentration increased. Films became more transparent with increasing glycerol and decreasing protein concentration, while water vapor permeability increased with increasing glycerol and protein concentration. Water sorption data of films were fitted to the Guggenheim, Anderson, and De Boer model. In general, equilibrium moisture content of films increased as glycerol level increased. Overall, the results showed that MDCM-P could be useful as a new protein source for both food and packaging industries.
AtıfScopus7WoS6OpenAlex9İncele - MakaleAçık Erişim2017Scopus SJRQ2Effect of different levels of pine honey addition on physicochemical, microbiological and sensory properties of set-type yoghurt
Mercan, Emİn; Akın, Nİhat
In this study, the effects of different levels of pine honey addition (3%, 5% and 7% w/v) to the yoghurt milk on starter bacteria, physicochemical and sensory characteristics of set-type yoghurts during the storage were investigated. Antioxidant activity and total phenolic content of yoghurts with added honey increased compared to control yoghurt. There was a significant increase in water-holding capacity (WHC), viscosity, total solids, redness (a*) and yellowness (b*) values of the yoghurt samples with the addition of honey at higher concentrations, whereas water activity (aw), pH and luminosity (L*) values decreased. Viscosity and WHC of the yoghurts increased during the storage.
AtıfScopus17WoS16OpenAlex17İncele - MakaleAçık Erişim2017Scopus SJRQ2L-shell differential cross-section and alignment of uranium at 59.54-keV photon energy
Akkuş, Tuba; Alım, Bünyamin; Yılmaz, Demet; Şahin, Yusuf
L X-ray differential cross-sections of uranium were calculated at several polar scattering angles (85°, 95°, 105°, 115°, 125°, and 135°) at 59.54-keV photon energy by using a Si(Li) detector. We observed that Ll and Lα X-rays were dependent on the polar scattering angle, whereas Lβ and Lγ X-rays were independent of the polar scattering angle. Therefore, the anisotropy parameters for Ll and Lα X-rays were obtained using the intensity ratios of Ll to Lγ X-rays and of Lα to Lγ X-rays to reduce some systematic errors.
AtıfScopus2WoS2OpenAlex2
İncele - MakaleAçık Erişim2017Scopus SJRQ2A new species of Hoplopholcus Kulczyński, 1908 (Araneae: Pholcidae) from the European part of Turkey
Demircan, Nurcan; Topçu, Aydın
A new species of Hoplopholcus Kulczyński, 1908 is described from caves in Tekirdağ and Kırklareli provinces of Turkey on the basis of both sexes. A morphological description and diagnosis are presented together with figures of the habitus and copulatory organs. http://www.zoobank.org/urn:lsid:zoobank.org:pub:12383325-FFC5-428C-8F3B-74D79C7ABB4E
AtıfScopus2WoS2OpenAlex1İncele - MakaleAçık Erişim2017Scopus SJRQ3Effects of origanum syriacum essential oil on blood parameters of broilers reared at high ambient heat
Tekce, E.; Gül, M.
The biochemical and hematological blood values of broilers fed under heat stress and that were administered Origanum syriacum (OS) essential oil were investigated in this study. In total, 400 male broilers (Ross-308; age, 1 day) were used for the period of 42-days of the study. The experiment included ten groups (n = 50/group; each group divided into five sub-groups): normal heat, 22°C: basal feed (BF)-positive control group (PC), BF + 100 ppm OS; BF + 300 ppm OS; BF + 600 ppm OS). Heat stress, 36°C: BF-positive control group (PC), BF + 100 ppm SOS; BF + 300 ppm OS; and BF + 600 ppm OS). Biochemical and hematological parameters were measured in blood collected into EDTA tubes. Total bilirubin, cholesterol, low-density cholesterol, Na+, Ca2+, and Mg2+ increased, whereas alanine aminotransferase, aspartate aminotransferase, creatine kinase (CK), CK-MB, urea, uric acid, Cl–, and K+ decreased (p<0.05); however, no changes were detected in the other hematological values.
AtıfScopus18WoS17OpenAlex17İncele - MakaleAçık Erişim2017Scopus SJRQ2Chinese postman problem approach for a large-scale conventional rail network in Turkey; [Primjena pristupa "problem kineskog poštara" na široku mrežu Turske željeznice]
Yılmaz, Mustafa; Çodur, Merve Kayacı; Yılmaz, Hamid
Every year, railways are inspected periodically to examine the status of rail tracks and ensure the safety of train operations of the railroad networks in Turkey. These inspection projects must be performed by several specialized machines with large and expensive equipment. Finding the optimum route of inspection machines that control through travelling all lines is critically important in terms of cost and distance. In current practice, determining the route of these machines is largerly manual and primarily relies on the knowledge and judgment of experts. This paper proposes Chinese Postman Problem (CPP) to solve the inspection machine routing problem. The objective is to minimize the total travel distance on the railroads by finding the shortest route. The proposed model is applied to a large-scale real world problem. Compared to the current practice the proposed approach significantly outperforms the reduced objective value by 20, 76%.
AtıfScopus6WoS5OpenAlex10İncele - MakaleYalnız künye2017Scopus SJRQ1Antimicrobial and functional properties of lactic acid bacteria isolated from sourdoughs
Demirbaş, Fatmanur; İspirli, Hümeyra; Kurnaz, Asena Ayşe; Yilmaz, Mustafa Tahsin; Dertli, Enes
The technological and functional properties of 15 LAB species previously isolated from sourdough were determined in terms of antifungal and antibacterial activities, production of GABA as a functional component and phytase activity. All sourdough isolates were capable of producing GABA and Weissella paramesenteroides N-7 and Lactobacillus paralimentarius E-106 showed the highest and the lowest production levels as 18,43 mM and 3,39 mM, respectively determined by HPLC analysis. The antifungal activity of these strains were tested against Aspergillus niger and Penicillium chrysogenum and two strains Lactobacillus paraplantarum N-15 and L. paralimentarius E-106 showed significant inhibitory effects to these mould species. Generally, different levels of antibacterial activity of these species were observed against food-borne pathogens but only one strain showed low levels of inhibitory effect to Salmonella typhimurium but not the other strains. The PCR detection of several bacteriocin coding genes revealed that all strains were harboured at least one bacteriocin gene among the tested genes. Finally, all strains showed phytase activity but these activity was dependant on strain specific conditions. This study revealed some important techno-functional properties of sourdough LAB strains which can play crucial roles on sourdough technology.
AtıfScopus73WoS60OpenAlex68İncele - MakaleAçık Erişim2017Scopus SJRQ3Asymmetric epoxidation of enones using cumyl hydroperoxide and in situ generated zinc complexes of chiral pyrrolidinyl alcohols
Karaman, Halide Sedef; Kılıç, Hamdullah; Şahin, Engin
The homogeneous asymmetric epoxidation of a range of enones was carried out using cumyl hydroperoxide, diethylzinc, and chiral pyrrolidinyl alcohol-containing ligands to afford the corresponding epoxy ketones with enantioselectivities of ≤97% ee. Examination of the enantioselectivities obtained in the asymmetric epoxidation of enones using a range of chiral ligands indicated that synergy between the sterically bulky bicyclo[2.2.2]octane skeleton and the substituents attached to the carbinol moiety played an important role in determining the reaction enantioselectivity. The position and nature of the substituent on the aromatic ring of the enone also had a pronounced effect on the observed enantioselectivity.
AtıfScopus5WoS5OpenAlex5İncele - MakaleYalnız künye2017Scopus SJRQ1Experimental determination of cohesion & internal friction angle on conventional concretes
Pul, Selim; Ghaffari, Amir; Öztekin, Ertekin; Hüsem, Metin; Demir, Serhat
Various failure criterions have been used for the nonlinear analysis of concrete and reinforced concrete structures. To get more accurate results from the analyses, the selected failure criterion must be appropriate with the characteristics of problem and the assumptions made in the criterion should comply with the characteristics of problem. In this study, an experimental investigation was carried out to determine the cohesion (c) and internal friction angle (?) values, which are in the compressive strength range of 14.4 MPa ≤ fcm cube ≤ 47.0 MPa (2.03 ksi ≤ fcm cube ≤ 6.82 ksi) that are used in failure criterions such as Mohr-Coulomb and Drucker-Prager preferred in end unit analyses for concrete and reinforced concrete structures. Tests are performed by using the direct shear test system, which is designed and produced for this study. Finally, cohesion and internal friction angle were determined between 2.94 and 12.34 MPa (0.43 and 1.79 ksi) and 29.8 and 41.7 degrees, respectively.
AtıfScopus44WoS38OpenAlex36İncele - Kitap BölümüAçık Erişim2017Cognitive approach to improve media literacy: Mind puzzles
Karadag, Zekeriya; Devecioglu-Kaymakci, Yasemin
This chapter starts with an exploration of the media literacy literature and its place in the developing 21st century. The literature suggests that media literacy should be considered as one of the capstones for the skills needed for the 21st century citizens. In terms of developing media literacy skills, scholars look at the concept from either cognitive or social perspective, and the review reveals that both of them are closely related to each other. Moreover, the study asserts that cognitive and metacognitive skills play a significant role in developing the media literacy and the skills for 21st century. Then, the chapter presents a city-wide activity done in Bayburt, Turkey. It is our assumption that the case presented here may be an inspiring example for whom may want to explore different approaches.
- MakaleAçık Erişim2017Scopus SJRQ1Concretes with synthetic aggregates for sustainability
Tekin, Ilker; Yasin Durgun, Muhammed; Gencel, Osman; Bilir, Turhan; Brostow, Witold; Hagg Lobland, Haley E.
We have used waste marble aggregates, marble dust and fly ash from thermic power plants as fillers in concretes for replacing natural aggregates. We have used two different kinds of cements. After curing, we have determined the workability (by slump tests), air content, unit weight, Schmidt hardness, ultrasound pulse velocity, compressive strength and carbonation depth. The concretes containing waste marble at least match or exceed the workability and strength of the control concrete type. Fly ash significantly improves the workability. Utilizing waste marble aggregate at the replacement ratio of 100% along with waste marble dust, fly ash and pozzolanic cements in concrete leads to lower cost – achieving at the same time environmentally friendly production process with decreased consumption of natural resources and energy. Our work also contributes to enhancement of sustainability by finding a use for marble waste and fly ash.
AtıfScopus28WoS24OpenAlex33İncele - MakaleAçık Erişim2017Scopus SJRQ1Inhibition behaviours of some phenolic acids on rat kidney aldose reductase enzyme: an in vitro study
Alim, Zuhal; Kilinç, Namik; Şengül, Bülent; Beydemir, Şükrü
Aldose reductase (AR) inhibitors have vital importance in the treatment and prevention of diabetic complications. In this study, rat kidney AR was purified 19.34-fold with a yield of 3.49% and a specific activity of 0.88 U/mg using DE-52 Cellulose anion exchange chromatography, gel filtration chromatography and 2′5′ ADP Sepharose-4B affinity chromatography, respectively. After purification, the in vitro inhibition effects of some phenolic acids (tannic acid, chlorogenic acid, sinapic acid, protocatechuic acid, 4-hydroxybenzoic acid, p-coumaric acid, ferulic acid, vanillic acid, syringic acid, α-resorcylic acid, 3-hydroxybenzoic acid and gallic acid) were investigated on purified enzyme. We determined IC50, Ki values and inhibition types of these phenolic acids. As a result, tannic and chlorogenic acid had a strong inhibition effect. On the other hand, gallic acid had a weak inhibition effect. In this study, all phenolic acids except for chlorogenic acid and p-coumaric acid showed non-competitive inhibition effects on rat kidney AR.
AtıfScopus61WoS60OpenAlex64İncele - MakaleYalnız künye2017Scopus SJRQ2Existence of one weak solution for p(X)-biharmonic equations involving a concave-convex nonlinearity
Mashiyev, Rabil Ayazoglu; Alisoy, Gülizar; Ekincioglu, Ismail
In the present paper, using variational approach and the theory of the variable exponent Lebesgue spaces, the existence of nontrivial weak solutions to a fourth order elliptic equation involving a p(x)-biharmonic operator and a concave-convex nonlinearity the Navier boundary conditions is obtained.
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