2014 Cilt 8 Sayı 24

Permanent URI for this collectionhttps://hdl.handle.net/11452/17020

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Browsing by Author "Azgın, Cansev"

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    Acute toxicity of bentazone (herbicide) and chlorpyrifos (insecticide) on oreochromis niloticus (L., 1754) larvae (bioassay)
    (Uludağ Üniversitesi, 2015-01-12) Azgın, Cansev; Göksu, Münir Ziya Lugal
    In this study, in aquatic environments negative effects which may occur in order to have information about, the acute toxicity Bentazone (Herbicide) and Chlorpyrifos (Insecticide) which widely used in agriculture in Cukurova Region has been researched into larvae Oreochromis niloticus (L., 1754). In this study, the test fish O. niloticus larvae (average weight 1.21±0.52 g, average length 4.29±0.2 cm) were obtained from the Çukurova University Fisheries Faculty Freshwater Fish Research and Application Station. In the experiment, five different concentrations together with the control group were used 2 test series. In the present study, methods of bioassay test which static method has been applied. The study was carried out under laboratory conditions at 25±2 oC. The results has been estimated with the dose-response data were fitted a log-logistic model by using R 3.0 statistical computation environment and DRC library. The 24-h acute LC50 values were calculated. According to the results, acute toxic effects researched Bentazone (Herbicide) and Chlorpyrifos (Insecticide) the 24-h LC50 acute toxic lethal concentration values for Oreochromis niloticus (L., 1754) larvae were calculated Bentazone (Herbicide) LC50 14.86±0.19 mgl-1 and Chlorpyrifos (Insecticide) LC50 0.40±0.02 mgl-1.
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    A comparison the biomass of productivity, protein and lipid content of spirulina platensis cultured in the pond and photobioreactor
    (Uludağ Üniversitesi, 2015-01-12) Azgın, Cansev; Işık, Oya; Uslu, Leyla; Ak, Burcu
    Dry matter, chlorophyll a, optical density, protein and lipid production of microalgae Spirulina platensis cultured in tubular and panel photobioreactors, and pond in June and September were compared. The highest dry matter of 4.951±0.03 gL-1 and 71.89±1% protein were determined from tubular photobioreactor, while the lowest dry matter of 2.710±0.02 gL-1 and 53.92±0.8% protein were recorded from panel photobioreactor. S. platensis cultured in the pond have 3.150±0.08 gL-1 dry matter and 70.29±0,8% protein. The water temperatures in June and September were similar, and it was observed that the culture in the panel was affected to the higher temperature (39.35±1.82 °C, 40.22±0.70 °C), negatively. The highest optical density (3.280±0.009) and lipid (7.74±0.5%) amounts were obtained from the culture produced in the tubular photobioreactors.