YYÜ GCRIS Basic veritabanının içerik oluşturulması ve kurulumu Research Ecosystems (https://www.researchecosystems.com) tarafından devam etmektedir. Bu süreçte gördüğünüz verilerde eksikler olabilir.

Browsing by Author "Yegin, Esref"

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • Thumbnail Image
    Article
    Effects of Omethoate on Certain Oxidative Biomarkers in Various Tissues of Frogs (Rana Ridibunda) at Acute Exposure
    (Sage Publications inc, 2012) Isnas, Musa; Yegin, Esref; Celik, Ismail
    The study aimed mainly to assess effects of omethoate on certain oxidative stress biomarkers in various tissues of frogs (Rana ridibunda). Biomarkers selected for stress monitoring were malondialdehyde (MDA) and antioxidant defense system (ADS) constituent such as reduced glutathione (GSH) level, glutathione peroxidase (GSH-Px), glutathione-S-transferase (GST) and superoxide dismutase (SOD) activities in the liver, brain, heart and kidney tissues of frogs exposed to 10 and 20 ppm dosages of omethoate for 24, 48, 72 and 96 hours. Results showed that the administrations of omethoate promote MDA content in the tissues of the frogs treated with both dosages of omethoate. With regard to the ADS, GSH-Px, GST, SOD activities and GSH levels decreased after 24, 48, 72 and 96 hours in the tissues of treatment groups compared with controls. Collective results demonstrated that the exposures to omethoate of frogs induced an increase in MDA joined with fluctuated ADS. This may reflect the potential role of these parameters as useful biomarkers for assessment of aquatic pollution.
  • Thumbnail Image
    Article
    Influence of Indole-3 Acid on Antioxidant Defense Systems in Various Tissues of Rats at Subacute and Subchronic Exposure
    (Pergamon-elsevier Science Ltd, 2009) Topalca, Nuray; Yegin, Esref; Celik, Ismail
    This study was carried out to investigate the effects of Indole-3-butyric acid (IBA), a plant growth regulator (PGR), on antioxidant defense systems (ADS) such as reduced glutathione (GSH) level and Glutathione-S-transferase (GST), glutathione peroxidase (GSH-Px) superoxide dismutase (SOD) enzymes activity in various tissues of rats exposed to 25 and 50 ppm dosages of IBA for 20 and 45 days. Results showed that the administrations of IBA fluctuated GSH levels in some tissues of rats treated with both dosages and periods. With regard to the ADS enzymes, SOD and GST activities increased significantly in the most of the tissues in rats treated with both dosages and periods of IBA. Also, GSH-Px activity fluctuated after subacute and subchronic exposure with both dosages in some of the tissues in rats compared to that the control rats. The observations presented led us to conclude that the administrations of IBA at subacute and subchronic affected the ADS system in various tissues of rats. This may reflect the potential role of these parameters as useful biomarkers for toxicity of IBA. Crown Copyright (C) 2009 Published by Elsevier Ltd. All rights reserved.