Browsing by Author "Öner, Ö"

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    Investigation of Some Pollution Parameters in Water and Sediment Samples Collected From the Lower Gediz River Basin
    Öner, Ö; Çelik, A
    The River Gediz, is the second greatest river of Aegean Region, is under threat of pollution caused by institutions of region, domestic waste, agricultural chemicals and artificial fertilizers. All kinds of substances which are above standardized limit values for water can make pollution. These pollutant levels could determine water usage aims. Heavy metals in trace level are the most hazardous of these matters. In our study, the physical and chemical parameters of water and the level of heavy metal concentration in water and sediment samples are analyzed in five different stations of Gediz River. The average level of some parameters are; BOD: 67.7 mg/L, COD: 88.7 mg/L, pH: 7.6, turbidity: 440 mg/L SiO(2). In water samples, the metals in high level are; Pb: 27.0+/-%0.8 mu g/L at Nif River, Cr: 48.9+/-%0.9 mu g/L at Muradiye Bridge, Cd: 12.1+/-%0.6 mu g/L at Istanbul Bridge, Cu: 90.2+/-%0.4 mu g/L at Muradiye Bridge, Ni: 309.8+/-%0.7 mu g/L, Fe: 914.1+/-%0.3 mu g/L, Zn: 208.3+/-%0.5 mu g/L in Karacay. The quality of water is at the level of four, according to Water Pollution Control Regulations. The sediment and soil samples taken from different station were also compared. It is seen that, the organic matter which is accumulated at the bottom of the river, increase the concentration of the metals.
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    Comparison of The Histopathologic Outcome of Three Different Allograft Used For The Repair of Spinal Dural Defect in Rats
    Atci, IB; Demirçivi Özer, F; Mete, M; Çamlar, M; Kocaman, Ü; Akçay, E; Ersahin, Y; Öner, Ö; Küpelioglu, A
    Purpose: Repairing of the duramater is one of the major factor that effects the mortality and morbidity of patients after neurosurgical approaches. The gold standard for repairing of duramater is watertight suture or duraplasty with autografts such as pericranium and/or temporal fascia. Sometimes edges of the dura mater generally are shrunken and the watertight suture of the dura becomes impossible especially in emergency conditions. In the present study, we aimed to determine the most effective artificial dural graft in experimental dural defect in rats. Materials and Methods: Twenty eights wistar albino rats weight ranging from 280-320 grams and equal numbers of male and female were used. The animals were divided into four groups. Control (n=7 Group-1), collagen matrix graft (n=7 Group-2), cellulose graft (n=7 Group-3) and teflon graft (n=7 Group-4). Rats were sacrificed after 30 days and their damaged dura were removed and sections were taken. All histological preparations examined using light microscope. Histological analysis focused on fibroblastic activation, new capillary formation, inflammatory reaction, foreign body reaction and capsule formation and results were compared. Results: While fibroblastic activation was observed most frequently in teflon graft group, new capillary formation, inflammatory reactions and capsule formation were most frequently seen in cellulose grafts group. Conclusion: This animal model for artificial dural grafts suggest that cellulose was the most effective dural substitute for repairing of defective dura.