Time filter

Source Type

Agr, Turkey

Ağrı İbrahim Çeçen University is a public higher educational institution located in Ağrı, Eastern Anatolia in Turkey. It was formerly the Faculty of Education linked to the Atatürk University of Erzurum.In 2007, the facility was developed to a university named Ağrı Dağı University . The university was later renamed following a protocol signed between the government and a local businessman and philanthropist İbrahim Çeçen.The university has six faculties, two institutes, five colleges, five vocational schools and five research and application centers. The university has two campuses old one is near city center and includes health related schools, and the main campus is located on side of highway to Erzurum. Wikipedia.

Gulcin I.,Ataturk University | Gulcin I.,Agri Ibrahim Cecen University
Journal of Medicinal Food | Year: 2011

Eugenol (4-allyl-2-methoxyphenol), a major phenolic component from clove oil (Eugenia caryophyllata), has several biological activities. To estimate the capacity of eugenol to act as an antioxidant, the following were studied: 1,1-diphenyl-2-picryl-hydrazyl-, 2,2′-azino-bis(3-ethylbenzthiazoline-6- sulfonic acid)-, and N,N-dimethyl-p-phenylenediamine-scavenging activity; total antioxidant activity; and ability to reduce ferric ions and cupric ions. Eugenol inhibited 96.7% (r 2=0.9319) lipid peroxidation of a linoleic acid emulsion at a 15-μg/mL concentration. Butylated hydroxyanisole, butylated hydroxytoluene, α-tocopherol, and Trolox ® displayed 95.4% (r 2=0.8482), 99.7% (r 2=0.7798), 84.6% (r 2=0.9272), and 95.6% (r 2=0.8511) inhibition of peroxidation, respectively, at the 15-μg/mL concentration. According to the results of this study, eugenol had the most powerful antioxidant activity and radical-scavenging activity. This study should prompt further studies of the antioxidant properties of eugenol. © Copyright 2011, Mary Ann Liebert, Inc. Source

Un A.,Agri Ibrahim Cecen University
Radiation Physics and Chemistry | Year: 2013

Effective atomic numbers, effective electron densities for photon mass energy absorption and kerma values of soft tissue and some thermoluminescence dosimeter containing boron are calculated in the energy range from 1. keV to 20. MeV. It is investigated that the variation of effective atomic numbers, effective electron densities and kerma with energy. The TL dosimeters studied are compared with the soft tissue for calculated values. In addition, dopant effect on the effective atomic numbers and electron densities for photon mass energy absorption and kerma values of the TL dosimeter containing boron is presented. Effect of the concentrations of the element H on effective electron density of the soft tissue is discussed. © 2012 Elsevier Ltd. Source

Yalcin F.A.,Agri Ibrahim Cecen University
Chemistry Education Research and Practice | Year: 2012

The aim of this study was to explore pre-service primary teachers' understandings of the effect of temperature and pressure on the solid-liquid phase transition of water. In the study a survey approach was used, and the sample consisted of one-hundred and three, third year pre-service primary science teachers. As a tool for data collection, a test composed of five open-ended questions was used. In addition, semi-structured interviews were conducted with four purposefully selected students. All interview records were transcribed and analyzed with respect to the students' misunderstandings. The results show that there were common misunderstandings in the students' written responses. The statistical analysis indicated that the chi square statistic calculated is significant at a level of 0.05, suggesting that the observed frequency differences among categories are not due to chance. It is believed that the results of the study carry valuable knowledge for researchers and teacher educators. This journal is © The Royal Society of Chemistry. Source

Doganlar Z.B.,Agri Ibrahim Cecen University
Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering | Year: 2012

In this study, the effects of the herbicide, quizalofop-p-ethyl, on pigment contents (total chlorophyll, chlorophyll a/b, carotenoid), antioxidant enzyme [superoxide dismutase (SOD) and guaiacol peroxidase (POD)] activities, lipid peroxidation product (malondialdehyde: MDA) and DNA profiles were investigated in Lemna gibba and Lemna minor. Laboratory-acclimatized plants were treated with quizalofop-p-ethyl at 31.375, 62.75, 125 and 250 mg L-1 for 24 and 96 h. It was determined that quizalofop-p-ethyl affected both the physiological status and the DNA profiles of L. gibba and L. minor. The photosynthetic pigments of L. gibba were more sensitive to the herbicide than were those of L. minor at both treatment times. SOD and POD activities were elevated in both plants at 24 h. However at 96 h, SOD activity decreased in L. minor and had irregular changes in L. gibba.. Significant increases in the amounts of MDA were observed in L. gibba, whereas the levels of this compound decreased in L. minor at 24 and 96 h. Polymorphism in DNA profiles was determined using the Random Amplified Polymorphic DNA (RAPD) technique. Four primers were used for scoring (appearance and disappearance of DNA polymorphic bands), and equally weighted maximum parsimony analyses were performed. Fewer differences were observed at 24 h, and more new bands were observed at 96 h in L. gibba. The RAPD profiles of L. minor produced by all of the primers were slightly less affected by the herbicide treatment than were those of L. gibba. Copyright © Taylor & Francis Group, LLC. Source

Doganlar Z.B.,Agri Ibrahim Cecen University
Water, Air, and Soil Pollution | Year: 2012

The effects of a five-pesticide mixture on pesticide accumulation, phytohormone levels (indole- 3-acetic acid, gibberellic acid, jasmonic acid, and salicylic acid), pigment contents (total chlorophyll and carotenoid), antioxidant enzyme (catalase and guaiacol peroxidase) activities, lipid peroxidation product (malondialdehyde), and DNA profiles were investigated in the leaves of Veronica beccabunga. Laboratoryacclimatized plants were treated with a mix of five pesticides (atrazine, disulfoton, chlorpyrifos, metalaxyl, and ethion) in doses of 50 ppt, 1 ppb, 100 ppb, and 1 ppm for 1, 3, and 6 days. The accumulation of each pesticide, from highest to lowest, was as follows: chlorpyrifos, atrazine, metalaxyl, disulfoton, and ethion. The amounts of total chlorophyll and protein decreased with increased pesticide concentration. Antioxidant enzyme activities and malondialdehyde amount increased linearly with increasing pesticide exposure. However, the highest pesticide concentration caused decreases in guaiacol peroxidase (POD) activity and malondialdehyde (MDA) content at all treatment times. Both jasmonic and salicylic acid levels increased with pesticide exposure and decreased gradually after. It was also determined that application of the pesticide mixture affected the DNA profiles of V. beccabunga. The most band changes were detected on the sixth day of treatment. © Springer Science+Business Media Dordrecht 2012. Source

Discover hidden collaborations