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    Monitoring the effects of water pollution on Cyprinus carpio in Karakaya Dam Lake, Turkey
    (Springer, 2006) Ozmen, M; Güngördü, A; Kucukbay, FZ; Güler, RE
    Karakaya Dam Lake (KDL) is one of the most important water sources, both for irrigation and fishery, located in eastern part of Turkey. This study is concerned with the pollution of the lake contributed by urban, industrial and agricultural activities. The parameters selected for this aim were the enzymes commonly used as biomarkers of environmental pollution. The activity of glutathione S-transferase (GST), carboxylesterase (CE), lactate dehydrogenase (LDH), acid phosphatase (ACP) and aspartate amino transferase (AST) has been determined in liver tissue samples of Cyprinus carpio, a representative species of KDL. Furthermore, brain acetylcholinesterase (AChE) activity which is mainly affected by pesticides such as organophosphates, has been assayed. Chemical analysis results showed that KDL was polluted by various heavy metals as it was apparent from water, sediment and gill tissue. The activity of brain AChE was significantly lower in all localities than Tecimli area (St-5) where there is no agricultural and industrial activities in the immediate periphery. Thus, this change of AChE activity may relate to agricultural pollution in KDL. On the other hand, no significant differences were found for selected enzyme biomarkers, but condition factor (CF) or hepatosomatic index were significantly different from the St-5 samples, a result that may be attributed to water pollution in KDL by various contaminants.
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    Serum zinc, copper, and magnesium levels in obese children
    (Blackwell Science, 1997) Yakinci, C; Pac, A; Kucukbay, FZ; Tayfun, M; Gul, A
    Serum zinc, copper and magnesium levels were measured using atomic absorption spectrophotometry in 41 obese and 41 healthy (control) children (between 7 and 11 years of age) who were living in Malatya (Turkey). Serum zinc levels of obese children (mean value 102.40+/-2.78 mu g/dL) were found to be significantly higher than those of the control group (mean value 80.49+/-2.98 mu g/dL; P < 0.01). Serum copper concentrations were also found to be significantly higher in obese children (mean value 132.34+/-1.79 mu g/dL) than the healthy controls (mean value 107.58+/-1.62 mu g/dL; P < 0.01). On the other hand, serum magnesium levels were found to be significantly lower in obese children (mean value 1.78+/-0.03 mg/dL) than in the healthy children (mean value 2.14+/-0.04 mg/dL; P < 0.01).