Erzincan, Turkey
Erzincan, Turkey

Erzincan University is a university in Erzincan, Turkey, with over 9000 students and 310 faculty.It was established on March 1, 2006 from a number of existing schools. The law school was established in 1987. The university plans to offer a program in cemetery management. Wikipedia.

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Bursal E.,Mus Alparslan University | Koksal E.,Erzincan University
Food Research International | Year: 2011

The purpose of this study was to determine the reducing power, metal chelating, and radical scavenging capabilities of water and ethanol extracts of sumac (Rhus coriaria L.), comparatively. The water and ethanol extracts of sumac were evaluated for their radical scavenging activities by means of the DPPH and DMPD assays. Water extract of sumac (R. coriaria L.) scavenged radicals effectively with EC50 values of 36.4μg/ml for DPPH free radical and 44.7μg/ml for DMPD cation radical. Similarly, the total reducing power of water extract was found higher than ethanol extract in both potassium ferricyanide reduction (FRAP) and cupric ions reduction capacity methods (CUPRAC). 2,2'-Bipyridine was used to determine the metal chelating activity and the result of water extract was found higher than ethanol extract. Total phenolic and total flavonoid contents of both extracts were studied as well. The values of water extract were found to be higher than that of ethanol extract. The present study found that water extracts of sumac (R. coriaria L.) have effective antioxidant and radical scavenging activities as compared to ethanol extracts. © 2010 Elsevier Ltd.

Akar O.,Erzincan University | Gungor O.,Karadeniz Technical University
International Journal of Remote Sensing | Year: 2015

Hazelnuts and tea are two major agricultural crops grown in the eastern Black Sea region in Turkey. Since this part of Turkey is not industrialized, most of the local people work in agriculture, making hazelnuts and tea a part of their lives. For the government side, it is crucial to keep records of the amount of harvested croplands to implement agricultural policies. In fact, the harvested area and crop type of each cadastral parcel are collected either during cadastral surveys or with the declaration of individual farmers, yet this information is mostly not up-to-date and does not reflect the current land-use status. This study aims to determine the extent and distribution of hazelnuts and tea grown areas using the Random Forest (RF) classification algorithm. Tea and hazelnuts give similar spectral reflectance values to surrounding vegetation, which makes it difficult to distinguish them using only their spectral properties. To tackle this problem, the normalized difference vegetation index (NDVI) and texture extraction methods such as the Grey Level Co-occurrence Matrix (GLCM) and Gabor filter were integrated with the RF algorithm, and their contributions to the success of the RF classification method were examined. WorldView-2 satellite images, which have eight multispectral bands (MS: 2 m) and one higher spatial resolution panchromatic band (PAN: 0.5 m), were used. Since the study area contains agricultural products grown in different seasons, satellite images belonging to both summer and winter periods were used. Preliminary results acquired using only spectral values indicated that the RF method gives 79.05% and 71.84% overall accuracies for summer and winter periods, respectively. Integrating texture information improves the performance of the RF algorithm such that the overall classification accuracies are increased to 83.54% and 87.89% when texture information extracted with GLCM and the Gabor filter is added. The classification performance of the winter image is also boosted to be 77.41% and 79.73% with the contribution of texture information obtained with GLCM and the Gabor filter, respectively. Finally, produced thematic maps were compared with the latest cadastral maps to validate classification results with ground truth data. The obtained results reveal the success of integrating texture features in classification since the created thematic maps are consistent with actual land use. The results also show that the crops grown on some cadastral parcels are not coherent with the most current cadastral database, which implies that the cadastral maps need to be updated. © 2015, Taylor & Francis.

Kara Y.A.,Atatürk University | Kurnuc A.,Erzincan University
Solar Energy | Year: 2012

A Trombe wall that uses a phase change material (PCM) as the heat storage medium is usually called a PCM Trombe wall or PCM wall. A research project was conducted to investigate the performance of coupled novel triple glass (NTG) and PCM wall, which is simply called PCM wall in this paper, as a solar space heater. The south façade of a test room was constructed using PCM walls. Rubitherm® GR35 and GR41 were incorporated into the plaster of the walls as PCM. The ratio of the solar energy gain provided by the PCM walls to the heat load of the test room per month varied from 4% to 70%; daily overall efficiency of the PCM walls varied from 20% to 36%; and solar transmittance of the NTG varied from 0.45 to 0.55 during the heating period. The overall efficiency of the PCM wall including GR35 was higher than that of the PCM wall including GR41. © 2012 Elsevier Ltd.

Ozbek H.H.,Erzincan University
International Journal of Acarology | Year: 2014

Olopachys(Olopachys) hallidayi sp. nov. is described based on the morphology of females collected from litter, moss and nest of ant in the north-eastern Turkey. The genus Olopachys is first reported from Turkey. An updated key to known species of the subgenus Olopachys s. str. is provided. © 2014 Taylor & Francis.

Caglar B.,Erzincan University
Journal of Molecular Structure | Year: 2012

A novel kaolinite-nicotinamide composite was prepared utilizing a kaolinite/N-methylformamide intercalation compound as a precursor material and examined the structural properties of the intercalated species. The X-ray powder diffraction pattern illustrated that intercalation of nicotinamide molecules between the layers of kaolinite caused an emergence of new peaks at 6.87 and 13.63(2θ) with the distance of 12.86 and 6.49 Å, respectively, belonging to the d001 and d002 planes of kaolinite-nicotinamide. The expansion of the d001 basal spacing (5.68 Å) point out the existence of nicotinamide species in the layers of kaolinite which are located as a monolayer arrangement. The aromatic rings of the nicotinamide molecules are perpendicular to the aluminum layers of kaolinite and also both top hydrogen atom of pyridine ring and oxygen atom of carbonyl is keyed into the ditrigonal holes in the silicate layers. The appearance of the peaks at 3630, 3533, 1596 and 1441 cm-1 and decrease of intensity of the inner-surface hydroxyls peak at 3696 cm-1 prove that nicotinamide molecules intercalated into kaolinite layers through forming H-bonds via pyridine ring nitrogen with inner-surface hydroxyls of kaolinite. The thermal stability of intercalated NAM molecules is up to 238°C. The organic molecules located in the interlayer spacing led to an appreciable decrease of particle size and differences in the morphology. The specific and mesoporous surface areas of intercalated composites increased whereas the average pore width of these species decreased with respect to that of pure kaolinite. © 2012 Elsevier B.V. All rights reserved.

Cetin M.,Erzincan University
Energy Education Science and Technology Part A: Energy Science and Research | Year: 2011

In this study; an experiment was carried out to examine the effects of LPG-ethanol fuel blends on the emission performance of a four cylinder SI engine. Such a type of research could not be reached in the literature. The modifications to the engine were minimal and a dual throat carburetor was used to mix LPG and ethanol before being fed into the carburetor. Using engine cooling water temperature, ethanol was evaporated before entering the carburetor. Performance tests were conducted to determine the correct air/fuel ratio (lambda = 1). Exhaust emissions were analyzed for CO, CO 2, NO x, HC, O 2 using LPG-ethanol blends with different percentages of fuel blends at variable engine speeds ranging between 1000 and 5000 rpm. It was observed that depending on the rate of ethanol increase in mixture, the CO 2, CO, NO x and HC emission concentrations in the engine exhaust gases decreased. © Sila Science.

Cu xZn 1 - xS (x = 0, 0.25, 0.50, 0.75, 1) thin films were deposited on glass substrates using Successive Ionic Layer Adsorption and Reaction (SILAR) method at room temperature and ambient pressure. The copper concentration (x) effect on the structural, morphological and optical properties of Cu xZn 1 - xS thin films was investigated. The X-ray diffraction (XRD) and scanning electron microscopy (SEM) studies showed that all the films exhibit polycrystalline nature and are covered well with glass substrates. The crystalline and surface properties of the films improved with increasing copper concentration. The energy bandgap values were changed from 2.07 to 3.67 eV depending on the copper concentration. The refractive index (n), optical static and high frequency dielectric constants (ε o, ε ∈) values were calculated by using the energy bandgap values as a function of the copper concentration. © 2011 Elsevier B.V. All rights reserved.

Gulnahar M.,Erzincan University
Superlattices and Microstructures | Year: 2014

In this study, the current-voltage (I-V) and capacitance-voltage (C-V) measurements of an Au/4H-SiC Schottky diode are characterized as a function of the temperature in 50-300 K temperature range. The experimental parameters such as ideality factor and apparent barrier height presents to be strongly temperature dependent, that is, the ideality factor increases and the apparent barrier height decreases with decreasing temperature, whereas the barrier height values increase with the temperature for C-V data. Likewise, the Richardson plot deviates at low temperatures. These anomaly behaviors observed for Au/4H-SiC are attributed to Schottky barrier inhomogeneities. The barrier anomaly which relates to interface of Au/4H-SiC is also confirmed by the C-V measurements versus the frequency measured in 300 K and it is interpreted by both Tung's lateral inhomogeneity model and multi-Gaussian distribution approach. The values of the weighting coefficients, standard deviations and mean barrier height are calculated for each distribution region of Au/4H-SiC using the multi-Gaussian distribution approach. In addition, the total effective area of the patches NAe is obtained at separate temperatures and as a result, it is expressed that the low barrier regions influence meaningfully to the current transport at the junction. The homogeneous barrier height value is calculated from the correlation between the ideality factor and barrier height and it is noted that the values of standard deviation from ideality factor versus q/3kT curve are in close agreement with the values obtained from the barrier height versus q/2kT variation. As a result, it can be concluded that the temperature dependent electrical characteristics of Au/4H-SiC can be successfully commented on the basis of the thermionic emission theory with both models. © 2014 Elsevier Ltd. All rights reserved.

Porikli S.,Erzincan University
Radiation Physics and Chemistry | Year: 2012

A systematic study of L X-ray spectrum has been made on the elements Dy, Ho and Er in the pure form elements and compounds to look into the influence of chemical effect. The vacancies were created by 59.54keV γ-rays from an 241Am radioactive source. The L X-ray emission spectra of heavy elements taken with the currently available Si(Li) detectors show four or five distinct peaks. Corrections for sample absorption and spectrometer efficiency were applied to the measured relative intensities. The results show agreement with the theoretical predictions of Scofield (Scofield, 1974a). © 2011 Elsevier Ltd.

Ozbek H.H.,Erzincan University
International Journal of Acarology | Year: 2015

Pachylaelaps (Longipachylaelaps) anatolicus sp. nov. is described based on the females collected from litter in north-eastern Turkey. The new species may be distinguished from the other congeners primarily by the multidentate chelicerae and spiniform epistome. The subgenus Longipachylaelaps is first reported from Turkey. © 2014 Taylor & Francis.

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