Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Dertli, Enes(116)
- Şahin, Engin(48)
- Kaya, Yunus(46)
- Özen, Soner(46)
- İspirli, Hümeyra(45)
- Pat, Suat(44)
- Şenay, Volkan(42)
- Korkmaz, Şadan(36)
- Yilmaz, Mustafa Tahsin(33)
- Kutlu, Naciye(32)
- Cuce, Erdem(31)
- Öner, Erdal(31)
- Artar, Musa(30)
- Ertugrul, Mehmet(29)
- Hasar, Ugur Cem(29)
- Mercan, Emin(28)
- Bayraktar, Bülent(27)
- Bayram, Sinan(27)
- Can, Zehra(25)
- Ecem Bayram, Nesrin(25)
- Çolak, Murat(23)
- Özdemir, Akın(23)
- Cuce, Pinar Mert(22)
- Sert, Durmuş(22)
- Ayata, Ümit(21)
- Bayram, Ozkan(21)
- Dirican, Ebubekir(20)
- Abdioglu, Murat(19)
- Ayazoglu, Rabil(19)
- Birinci, Ahmet(19)
- Kamiloğlu, Aybike(19)
- Gerçek, Yusuf Can(18)
- Taylan, Osman(18)
- Tozlu, Alperen(18)
- Gul, Volkan(15)
- Hasar, Ugur C.(15)
- Kadakal, Mahir(15)
- Sagdic, Osman(15)
- Ergün, Mustafa(14)
- Kadakal, Huriye(14)
Yayınlar
- MakaleAçık Erişim2017Scopus SJRQ3Debaryomyces hansenii as a new biocatalyst in the asymmetric reduction of substituted acetophenones
Şahin, Engin
Chiral secondary alcohols are convenient mediator for the synthesis of biologically active compounds and natural products. In this study fifteen yeast strains belonging to three food originated yeast species Debaryomyces hansenii, Saccharomyces cerevisiae and Hanseniaspora guilliermondii were tested for their capability for the asymmetric reduction of acetophenone to 1-phenylethanol as biocatalyst microorganisms. Of these strains, Debaryomyces hansenii P1 strain showed an effective asymmetric reduction ability. Under optimized conditions, substituted acetophenones were converted to the corresponding optically active secondary alcohols in up to 99% enantiomeric excess and at high conversion rates. This is the first report on the enantioselective reduction of acetophenone by D. hansenii P1 from pastırma, a fermented Turkish meat product. The preparative scale asymmetric bio reduction of 3-methoxy acetophenone 1g by D. hansenii P1 gave (R)-1-(3-methoxyphenyl) ethanol 2g 82% yield, and >99% enantiomeric excess. Compound 2g can be used for the synthesis of (+)-NPS-R-568 [3-(2-chlorophenyl)-N-[(1R)-1-(3-methoxyphenly) ethyl] propan-1-amine] which have a great potential for the treatment of primary and secondary hyper-parathyroidism. In addition, D. hansenii P1 successfully reduced acetophenone derivatives. This study showed that this yeast can be used industrially to produce enantiomerically pure chiral secondary alcohols, which can be easily converted to different functional groups.
AtıfScopus25WoS24OpenAlex26
İncele - MakaleYalnız künye2017Scopus SJRQ2The Al doping effect on the surface, optical, electrical and nanomechanical properties of the ZnO and AZO thin films prepared by RF sputtering technique
Pat, Suat; Mohammadigharehbagh, Reza; Özen, Soner; Şenay, Volkan; Yudar, H. Hakan; Korkmaz, Şadan
In this study, ZnO and aluminum doped ZnO (AZO) thin films were deposited at constant RF power of 100 W for the determine of the structural, surface, optical, electrical and nanomechanical properties. X–Ray diffraction (XRD), atomic force microscopy (AFM), nanoindentation technique and UV–Vis spectrophotometer were used. ZnO (100) and ZnO (004) orientations were detected in the ZnO and AZO films. The crystallite size values for the films were calculated as to be as 35 nm and 20 nm for ZnO and AZO thin films, respectively. It was found that the roughness values decreased to 3.15 nm from 5.15 nm for AZO and ZnO films, respectively. The hardness values of the ZnO and AZO thin films are measured as 7 GPa and 11 GPa. Young's modulus values were determined as 155 GPa and 95 GPa for ZnO and AZO films, respectively. The ZnO and AZO thin films have high transparency.
AtıfScopus50WoS50OpenAlex57İncele - MakaleAçık Erişim2017Scopus SJRQ1Effect of high pressure homogenization (HPH) on microstructure and rheological properties of hazelnut milk
Gul, Osman; Saricaoglu, Furkan Turker; Mortas, Mustafa; Atalar, Ilyas; Yazici, Fehmi
The effect of high pressure homogenization (HPH) on microstructure and rheological properties of hazelnut milks was investigated. Hazelnut milk samples were produced from cold pressed hazelnut cake and homogenized up to 150 MPa pressure. Microstructural and rheological properties of products, except temperature sweep, were greatly affected by HPH treatments. Homogenized samples showed significant reduction in particle size, which turned from bimodal and poly-disperse to monodisperse distributions. HPH decreased the consistency of products from 91.82 to 0.51 Pa.sn and increased flow behavior index from 0.15 to 0.36. All samples showed higher values G′ than G″, which indicates that samples could be classified as soft-gel network, and hazelnut milk samples did not obey the Cox-Merz rule without multiplying angular frequency with shift factor. In conclusion, HPH can be used to reduce the consistency of samples and the friction loss, thus minimizing the amount of energy required to flow during processing and distribution. Industrial relevance. Vegetable based beverages are available at any supermarket as an alternative to dairy products with an increasing consumer acceptance. Between these beverages hazelnut milk samples are the most noteworthy products due to important role in human nutrition and health, and moreover due to well accepted and widely consumed product. Due to its composition, hazelnut milks have very high consistency, and therefore, the energy consumption for processing and handling is too high. In this research, the high pressure homogenization (HPH) technology was successfully proposed to be used for improving microstructural properties, and hence reducing its consistency. The energy consumption during processing and distribution can be minimized by reducing the consistency and friction losses of product.
AtıfScopus97WoS80OpenAlex100İncele - MakaleAçık Erişim2017Scopus SJRQ1Potential application of high pressure homogenization (HPH) for improving functional and rheological properties of mechanically deboned chicken meat (MDCM) proteins
Saricaoglu, Furkan Turker; Gul, Osman; Tural, Serpil; Turhan, Sadettin
The potential application of high pressure homogenization (HPH) for modifying the solubility, emulsifying and foaming properties, particle size distributions, zeta potential and rheological properties of mechanically deboned chicken meat (MDCM) proteins was evaluated. HPH decreased particle size, produced higher zeta potential and stronger electrostatic repulsion, and hence, improved water solubility, as well as emulsifying, foaming properties, flow ability and dynamic shear properties of protein suspensions. Steady and dynamic shear results indicated that samples had shear-thinning and soft-gel network behavior due to higher G′ than G″. Creep and recovery tests were explained with Burgers and exponential decay models, respectively, and led to a better understanding the internal structure, as well as elastic and viscous behavior. The final percentage recovery increased as homogenization pressure increased due to strengthened solid-like structure of protein suspensions. These results revealed that HPH can be a valuable process to improve functional and rheological properties of MDCM proteins.
AtıfScopus53WoS51OpenAlex56İncele - BildiriAçık Erişim2017The speed control of DC motor under the load condition using PI and PID controllers
Corapsiz, Muhammed Reşit; Kahveci, Hakan; Akdemir, A.O.; Ekinci, A.; Han, I.; Oztekin, A.; Set, E.; Dadasoglu, F.; Karagoz, K.
In this study, it was aimed to compare PI (Proportional-Integral) and PID (Proportional-Integral-Derivative) controllers for speed control of Permanent Magnet Direct Current (PMDC) motor under both load and without load. For this purpose, firstly, the mathematical model was obtained from the dynamic equations of the PMDC motor and the obtained mathematical model was transferred to the simulation environment and modeled using Matlab/SIMULINK. Following the modeling process, PI and PID controller structures were formed, respectively. Secondly, after these structures were formed, the PMDC motor was run without any controller. Then, the control of the PMDC motor with no load was provided by using PI and PID controllers. Finally, the PMDC motor were loaded under the constant load (TL = 3 N.m.) for each condition and selected time period (t = 3 s). The obtained result for each control operations was comparatively given by observing effects of loading process on systems. When the obtained results were evaluated for each condition, it was observed that PID controller have the best performance with respect to PI controller.
AtıfScopus3OpenAlex4İncele - BildiriYalnız künye2017Antiproliferative and apoptotic effects of diffractaic acid in A549 and AGS cancer cells
Klzll, Hamit Emre; Aǧar, Güleray; Akdemir, A.O.; Ekinci, A.; Han, I.; Oztekin, A.; Set, E.; Dadasoglu, F.; Karagoz, K.
In this study, we determined the antiproliferative and apoptotic effects of diffractaic acid by measuring the gene expression changes of topo II α, caspase-3 and p53 on A549 and AGS cancer cells. Real time PCR assay was used to measure the change folds. It was determined that concentrations of 12,5, 50 and 100μg / ml were antiproliferative and apoptotic for the A549 cancer cell line and 50μg / ml for the AGS cell line.
AtıfScopus2WoS1OpenAlex2İncele - MakaleYalnız künye2017Scopus SJRQ2Morphological, Biochemical and Antioxidant Properties of Local Loquat (Eriobotrya Japonica (Thunb.) Lindl.) Germplasm from Turkey; [Morphologische, biochemische und antioxidative Eigenschaften des Zuchtmaterials der Japanischen Wollmispel (Eriobotrya Japonica (Thunb.) Lindl.) aus der Türkei]
Akbulut, Mustafa; Gozlekci, Sadiye; Ercisli, Sezai; Cakir, Ozlem
Loquat (Eriobotrya japonica L.) grown well for commercial purposes in subtropical regions nearly 30 countries and originated from China. The most important loquat producers in the world are China, Spain, Turkey, Pakistan, India, Italy and Brazil. In this study, ten pre-selected promising loquat genotypes sampled from eastern Black region and analyzed for their important morphological, biochemical and antioxidant characteristics. The standard cultivar ‘Sayda’ is also included in the study. The results indicated differences for all of the morphological, biochemical and antioxidant characteristics among tested genotypes. Fruit mass and fruit flesh percentage of the genotypes ranged from 35.40 g (LOQ-8) to 46.90 g (LOQ-5) and from 79.40 (%) to 86.32 (%) indicating some local genotypes had higher fruit mass and fruit flesh percentage than standard cultivar ‘Sayda’. Total phenolic content was the highest as 263 μg GAE/g in LOQ-7 genotype while the lowest in LOQ-8 genotype (185 μg GAE/g). LOQ-7 genotype had the highest total antioxidant capacity. Local genotypes in general have higher total phenolic, total carotenoid, vitamin C and antioxidant activity than cv. ‘Sayda’.
AtıfScopus3WoS5OpenAlex4İncele - BildiriYalnız künye2017Buildup factors and kerma for Al2O3 and SiO2 in the energy range 0.015-15MeV
Yllmaz, Demet; Allm, Bünyamin; Akkuş, Tuba; Güzeldir, Betül; Akdemir, A.O.; Ekinci, A.; Han, I.; Oztekin, A.; Set, E.; Dadasoglu, F.
The energy absorption buildup factors (EABF) have been calculated for some thermoluminescent dosimetric materials (Al2O3 and SiO2) in the energy region 0.015-15MeV up to the penetration depth of 40 mean free paths (mfp). Also, kerma relative to air has been determined for these materials. It is observed that the energy absorption buildup factors and kerma relative to air depend on the photon energy and chemical content. Also, the energy absorption build up factors are found the highest in intermediate energy whereas the lowest in low- as well as high energies.
AtıfScopus1WoS1OpenAlex1İncele - BildiriYalnız künye2016Scopus SJRQ1Functional properties of lactic acid bacteria (LAB) playing crucial roles on sourdough biotechnology
Dertli, Enes; Yilmaz, Mustafa Tahsin
AtıfWoS1OpenAlex2İncele - BildiriAçık Erişim2016Scopus SJRQ1Antagonistic activities of lactic acid bacteria isolated from Pastirma
Cinar, Kubra; Kaya, Mukerrem; Kaban, Guzin
AtıfWoS1OpenAlex1İncele - BildiriÖn baskısı açık2016Medium Access Control Protocols for Wireless Sensor Networks with Ambient Energy
Kosunalp, Selahattin; Tabakcioglu, Mehmet Baris
Wireless sensor networks (WSNs) have recently been a popular research area with a broad range of applications. One of the most significant constraints of WSNs is energy limitation of sensor nodes. Therefore, energy-efficiency has been considered as primarily design criterion in many medium access control (MAC) protocols developed. In order to solve the issue of limited-energy sources, various recent protocols have focused on energy harvesting from surrounding environment, such as solar, wind and vibration energy, resulting in providing unlimited energy source. Ambient energy exhibits a characteristic of unlimited energy source but not available always due to environmental changes. The focus is now being placed on effective utilization of the time-varying ambient energy. This study aims to provide a review of recently proposed MAC protocols for energy-harvesting WSNs describing their operating principles and underlying features.
- BildiriAçık Erişim2016A study on the development of an infographic designer questionnaire and designer opinions
Yildirim, Serkan; Yildirim, Gurkan; Çelik, Embiya; Kaban, Abdullatif; Gunduz, HB; Masal, E; Caliskan, H
Technological developments and changes in how learning is understood have not only changed learning environments, but also how educational materials are developed. Infographics, one of the materials that are becoming increasingly more popular in learning environments, have nowadays become quite commonplace. Demonstrating the understanding of those who design such instructional materials is important with respect to the organisation of learning processes. In this study, we devised a questionnaire that aims to demonstrate the understanding infographic designers have of infographic design. A total of 94 students from the Department of Computer and Instructional Technologies Education of the Kazim Karabekir Faculty of Education took part in this study conducted during the fall semester of the 2013-2014 academic year. The participants were given a questionnaire consisting of 41 items that enquired about the readers' views regarding infographic design. The collected data were assessed using Principal Component Analysis. Based on the analysis results, a questionnaire form consisting of 27 items and 8 factors (Understanding of Design, Design Process, Copyrights, Introduction, Readability, Sharing, References, Development) was developed.
AtıfOpenAlex3İncele - BildiriAçık Erişim2016Scopus SJRQ1Determination of functional characteristics, presence of virulence factors and antibiotic resistance of enterococci isolated from Turkish White-Cheese
Akin, Nihat; Dertli, Enes; Ispirli, Humeyra; Yuvasen, Ayse; Akaya, Zuhal
- MakaleYalnız künye2016Rheological and Molecular Characterization of Modified Pectin from Sugar Beet Meal
Yilmaz, Mustafa Tahsin; Muslu, Asli; Dertli, Enes; Toker, Omer Said
The pectin was produced from sugar beet pulp, one of the significant waste of sugar industry, at optimum conditions (pH, time and temperature). Then, the modification was carried out using pectinase. FT-IR (Fourier transform infrared spectroscopy) and HPLC (high performance liquid chromatography) analysis were performed to characterize the differences between modified and unmodified pectin. FT -IR analysis revealed the specific regions of pectin and 1600-1800 cm-1 bands. Galacturonic acid content was analyzed by HPLC. The obtained results revealed that the modified pectin had higher galacturonic acid content. In addition, flow properties of the modified pectin was also determined. The flow characteristics of modified pectin was observed to change.
AtıfWoS1İncele - BildiriAçık Erişim2016A study on the development of an infographic reader questionnaire and reader opinions
Yildirim, Serkan; Çelik, Embiya; Yildirim, Gurkan; Kaban, Abdullatif; Gunduz, HB; Masal, E; Caliskan, H
Educational materials are commonly used to assist with communication during learning. One of the ways to determine the use of educational materials and their contribution to the learning process is to ask students for their opinions. Student opinions provide useful information regarding various objectives such as making both the learning process and resources more effective, bringing about the necessary improvements and organising the teaching process. In this study, we developed a questionnaire for determining the opinions of information graphics (infographics) readers on information graphics prepared for teaching purposes. This study was conducted in the fall semester of the 2013-2014 academic year with the participation of 59 students from the Department of Computer and Instructional Technologies Education of the Kazim Karabekir Faculty of Education. The students were provided with a questionnaire consisting of 29 items that inquired their opinions on infographics. The collected data were assessed using Principal Component Analysis. Based on the analysis results, a second questionnaire consisting of 23 items and six factors (Learnability, Selection Preferences, Sharing, Basic Presentation Structure, Memorability, and Role in the Learning Process) was developed. According to the study results, the students considered infographics as highly instructive, and described that they help ensure a more lasting learning experience.
AtıfOpenAlex5İncele - MakaleAçık Erişim2016An Alternative Approach to Budget Management in University: Participatory Budgeting
Çam Tosun, Figen
The aim of this study is to reveal university / faculty managers and university components' (student, teaching staff, and administrative staff) opinions about participatory budgeting. In this research qualitative E research method was used to describe university / faculty managers and university components (student, 0 teaching staff, and administrative staff) opinions about participatory budgeting. Interviews were made as a part of qualitative research method. Working group is composed of totally 66 members from Ankara, Balikesir and Erzincan Universities. Semi-structured interview forms developed by researcher were applied as data collection tools. Collected data in interviews were applied descriptive analysis technique. When we take participants as a whole, the majority want participatory budget to be carried out at the universities.
- BildiriYayıncıda açık erişim2016Scopus SJRQ1Determination of antigenotoxic, proliferative and cytotoxic properties of ellagic acid
Ceker, S.; Agar, G.; Anar, M.; Kizil, H. E.
- MakaleAçık Erişim2016Scopus SJRQ2Surface, Nanomechanical, and Optical Properties of Mo-Doped GeGaAs Thin Film Deposited by Thermionic Vacuum Arc
Pat, Suat; Senay, Volkan; Özen, Soner; Korkmaz, Sadan
Mo-doped and undoped GeGaAs layers have been deposited by the thermionic vacuum arc (TVA) method, an alternative, fast plasma deposition technique. The thicknesses of the deposited layers were identical. The surface, mechanical, and optical properties of the deposited layers were studied to determine the influence of Mo doping on GeGaAs. The transparency of GeGaAs was shifted towards the near-infrared region by Mo doping. Bandgap values shifted by approximately 0.3 eV. In other words, the bandgap value of Mo-doped GeGaAs was nearly equal to that of GaAs materials. The average roughness and grain size of the Mo-doped material were smaller than for the GeGaAs layer. The particle distributions of the Mo-doped and undoped GeGaAs were almost perfect Gaussians. However, the mean height of the Mo-doped GeGaAs grains was six times that for undoped GeGaAs. The surface was homogeneous. The Mo-doped layer showed greater absorbance than the GeGaAs material. The produced Mo-doped sample showed hybrid properties.
AtıfWoS1OpenAlex1İncele - MakaleYalnız künye2016Scopus SJRQ3PHYTOCHEMICAL PROFILES OF WILD GROWN BLACKBERRY AND MULBERRY IN TURKEY
Akin, Meleksen; Eyduran, Sadiye Peral; Ercisli, Sezai; Yilmaz, Ilker; Cakir, Ozlem
Blackberry and mulberry are main berry crops grown in Black Sea region mostly in humid shade forest areas and its important for local people's diet and also important for the maintenance of their health and prevention of disease. Present study aimed to determine the content of vitamin C, organic acids (citric acid, tartaric acid, oxalic acid, malic acid, succinic acid, fumaric acid), sugars (glucose and fructose) and phenolic compounds (catechin, rutin, quercetin, chlorogenic acid, ferulic acid, o-coumaric acid, p-coumaric acid, caffeic acid, syringic acid, vanillic acid, and gallic acid), as well as antioxidant capacity (Trolox Equivalent Antioxidant Capacity, TEAC assay) in the wild grown blackberry and mulberry fruit. Among phenolic acids, chlorogenic acid was the predominant for all wild grown blackberries, white and black mulberries. The presence of oxalic acid was only detected in the wild blackberry genotype. As a result, the phytochemical recognition of the wild grown blackberry, black and white mulberries might contribute to forthcoming investigations for developing the efficiency of food industry.
AtıfWoS8İncele - MakaleYalnız künye2016ANALYSIS OF A LONG STRIP CONTAINING AN INTERNAL OR EDGE CRACK USING FEM
Yaylaci, Murat; Birinci, Ahmet; Adiyaman, Gokhan; Öner, Erdal
This paper presents the elastostatic plane problem of a long strip containing an internal or edge crack perpendicular to its boundaries. The plane problem consists of an infinitely long strip of thickness h. The infinitely long strip is loaded by uniformly distributed load and rests on two simple supports. It is assumed that the effect of gravity is neglected. The finite element model of the problem is constituted using ANSYS software and the two dimensional analysis of the problem is carried out. Normalized stress-intensity factors for the cases with internal and edge crack, and normal stress (sigma(x)) for uncracked layer case are obtained for various dimensionless quantities. Finally, the results obtained from the finite element analysis are verified by comparing with analytical ones and it is seen that the results from finite element analysis indicate a good agreement with the analytical solution.
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