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Articles by Ekrem KOKSAL
Total Records ( 2 ) for Ekrem KOKSAL
  Mesut Isik , Mustafa Korkmaz , Ercan Bursal , Ilhami Gulcin , Ekrem Koksal and Hatice Tohma
  Oxidative stress has been suggested to explain the mechanism of numerous diseases and antioxidants have been proposed to prevent cellular oxidative damage, therefore disease progression. Antioxidant capacity of many plants, fruits and vegetables have been studied by the researches, however there was no data regarding the antioxidant properties of Gypsophila bitlisensis. The species is an endemic and natural plant of Turkey. We performed three assays to reveal antioxidant capacity of ethanol extract of Gypsophila bitlisensis: FRAP, DPPH and CUPRAC. Trolox and α-tocopherol have been used as standards. We also determined phenolic content of the extract. The results showed that Gypsophila bitlisensis does not have significant antioxidant capacity and phenolic content. On the basis of these findings, we concluded that Gypsophila does not have considerable antioxidant activity in these in vitro assays.
  Ilhami GULCIN , Sukru BEYDEMIR , Olcay HISAR , Ekrem KOKSAL and Russel J. REITER
  Effects of melatonin on the levels of antioxidant enzymes including catalase (CAT), peroxidase (POD), glutathione reductase (GRd), and malondialdehyde (MDA), a lipid peroxidation marker, in erythrocytes of rainbow trout (Oncorhynchus mykiss) were investigated. The results showed that melatonin statistically activated the CAT, POD, and GRd activity (P < 0.05). Moreover, MDA levels were significantly decreased as a result of melatonin treatment (P < 0.01).
 
 
 
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