title: A statistical evaluation of the potential genotoxic activity in the surface waters of the Golden Horn Estuary.
abstract: The potential genotoxic activity in the surface waters of the Golden Horn Estuary was statistically evaluated utilizing a combination of appropriate parametric and non-parametric tests. The genotoxic activities that were associated with the water samples were determined by the SOS chromotest microplate assay. This assay utilizes β-galactosidase activity, alkaline phosphatase activity, and four different solvent controls, to generate reliable results when corrected induction factors (CIF) are used as quantitative measurements of genotoxic activity. The CIF values were obtained from a total of 384 different genotoxic experiments that were grouped into subsets according to the respective seasons and the selected sampling locations. A total of 160 subsets were statistically compared to assess any possible differences between the pairs of groups, with 95% confidence limits. The findings of this study clearly indicate that some seasonal variations exist in the CIF values at several sampling sites. However, no potentially hazardous impact to the aquatic environment was found in the estuarine system.
authors.affiliation: Department of Environmental Engineering, Faculty of Civil Engineering, Yildiz Technical University, 34220 Davutpasa, Esenler, Istanbul, Turkey. ekocak@yildiz.edu.tr
authors.forename: Emel
authors.initials: E
authors.lastname: Kocak
authors.forename: Kaan
authors.initials: K
authors.lastname: Yetilmezsoy
authors.forename: M Talha
authors.initials: MT
authors.lastname: Gonullu
authors.forename: Mustafa
authors.initials: M
authors.lastname: Petek
mesh_terms: D001419:Bacteria / Q000235:genetics / Q000378:metabolism; D003124:Colorimetry; D017753:Ecosystem; D004784:Environmental Monitoring / Q000379:methods*; D015233:Models, Statistical; D009152:Mutagenicity Tests; D012621:Seasons; D012623:Seawater / Q000737:chemistry*; D014421:Turkey; D014874:Water Pollutants, Chemical / Q000633:toxicity*
chemical_list: D014874:Water Pollutants, Chemical