... substances was determined by comparing the absorption to the standard curve of MDA equivalents generated by acid catalyzed hydrolysis of 1,1,3,3 tet-ramethoxypropane. The optical density was meas-ured ... Ceylan3 1. Yuzuncu Yil University, Medical Faculty, Department of Physical Medicine Rehabilitation and Rheumatology, Van, Turkey; 2. Yuzuncu Yil University, Medical Faculty, Department of ... (U/ml) of GSH-Px activity. Myeloperoxidase (MPO) analysis MPO activity was measured according to the modified method of Bradley et al [18]. MPO activity in the supernatant was determined by adding...