Browsing by Author "Yetkin, Aysen"

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Effects of 900-Mhz Electromagnetic Field Emitted From Cellular Phone on Brain Oxidative Stress and Some Vitamin Levels of Guinea Pigs
(Elsevier, 2007) Meral, Ismail; Mert, Handan; Mert, Nihat; Deger, Yeter; Yoruk, Ibrahim; Yetkin, Aysen; Keskin, Siddik
This study was designed to demonstrate the effects of 900-MHz electromagnetic field (EMF) emitted from cellular phone on brain tissue and also blood malondialdehyde (MDA), glutathione (GSH), retinol (vitamin A), vitamin D3 and tocopherol (vitamin E) levels, and catalase (CAT) enzyme activity of guinea pigs. Fourteen male guinea pigs, weighing 500-800 g were randomly divided into one of two experimental groups: control and treatment (EMF-exposed), each containing seven animals. Animals in treatment group were exposed to 890- to 915-MHz EMF (217-Hz pulse rate, 2-W maximum peak power, SAR 0.95 w/kg) of a cellular phone for 12 h/day (11-h 45-min stand-by and 15-min spiking mode) for 30 days. Control guinea pigs were housed in a separate room without exposing EMF of a cellular phone. Blood samples were collected through a cardiac puncture and brains were removed after decapitation for the biochemical analysis at the end of the 30 days of experimental period. It was found that the MDA level increased (P < 0.05), GSH level and CAT enzyme activity decreased (P< 0.05), and vitamins A, E and D3 levels did not change (P > 0.05) in the brain tissues of EMF-exposed guinea pigs. In addition, MDA, vitamins A, D3 and E levels, and CAT enzyme activity increased (P < 0.05), and GSH level decreased (P < 0.05) in the blood of EMF-exposed guinea pigs. It was concluded that electromagnetic field emitted from cellular phone might produce oxidative stress in brain tissue of guinea pigs. However, more studies are needed to demonstrate whether these effects are harmful or/and affect the neural functions. (C) 2007 Elsevier B.V. All rights reserved.
Intestinal Parasites in the Students of Van Health High School and Faculty of Veterinary Medicine
(Kafkas Univ, veteriner Fakultesi dergisi, 2010) Yetkin, Aysen; Deger, Serdar; Ozdal, Nalan
This study was carried out to investigate the prevalence of intestinal parasites among the students of Van Health High School and Faculty of Veterinary Medicine. Faeces samples were collected from 40 females and 70 males, a total of 110 students. Then, the samples were examined by using the methods of saturated salt water (Fulleborn's flotation technique), native-lugol and trichrome stain. Of the 110 students surveyed for intestinal parasites, 34 (30.9%) had one or more parasites. Infection was observed in 8 female (20%), and 26 male (37.1%) students. Twelve intestinal parasite species were detected in stool specimens. The most common intestinal parasites are Entamoeba coli (18.18%), Giardia intestinalis (14.54%), Entamoeba histolytica (13.63%) and Blastocystis hominis (11.81%) in the present study. In conclusion, the Students of University of Yuzuncu Yil, Faculty of Veterinary Medicine and Van Health High School had high intestinal parasitic infection. Thus, the results suggest that both students and community must be fully aware of this public health risk.