Investigation of PCB levels and sources: The case of Ankara Creek, Turkey

Ozyurek, Nazan
Gedik, Kadir
İmamoğlu, İpek
Siltu, Ezra


Investigation of thermal characteristics of naphthoxazines and polynaphthoxazines via pyrolysis mass spectrometry
Koyuncu, Zeynep; Hacaloğlu, Jale; Department of Chemistry (2009)
In this study, polymerization mechanisms of aromatic (C6H5 or C6F5) and alkyl (CH3, C2H5, C3H7, C6H13, C12H25 or C18H37) amine based naphthoxazine monomers (15-Na, 15Na-C1, 15Na-C2, 15Na-C3, 15Na-C6, 15Na-C12 and 15Na-C18) and thermal degradation mechanisms of polynaphthoxazines synthesized by curing the naphthoxazine monomers (P-15-Na, P-15NaF, P-15Na-C1, P-15Na-C2, P-15Na-C3, P-15Na-C6, P-15Na-C12 and P-15Na-C18) were studied by direct pyrolysis mass spectrometry. During the curing process, the evolutions...
Exploring representation of nature of science aspects in 9th grade chemistry textbooks
Esmer, Feyza; Geban, Ömer; Department of Secondary Science and Mathematics Education (2011)
The aim of this study was to examine the representation of Nature of Science (NOS) aspects in 9th grade chemistry textbooks. Two textbooks nation-wide used are analyzed, one of them is written in Turkish the other in English. These textbooks were written according to 2008-2009 education program’s curriculum. A qualitative oriented approach was employed and ethnographic content analysis was used as the methodological framework for this research as Irez (2006) has performed. Data were analyzed by means of boo...
Preparation and characterization of magnetic nanoparticles
Küçük, Burcu; Volkan, Mürvet; Department of Chemistry (2009)
Magnetite (Fe3O4) and Maghemite (γ-Fe2O3) are well-known iron oxide phases among magnetic nanoparticles due to their magnetic properties, chemical stability, and nontoxicity. They have gained acceptance in several fields of application of nanomaterials such as magnetic recording systems, magnetic refrigeration, magneto-optical devices, magnetic resonance imaging, magnetic separation techniques and separation and purification of biological molecules. Recently, there is a growing interest in the synthesis of ...
Simultaneous detection of surface coverage by helium atom diffraction and quartz crystal microbalance techniques
Danışman, Mehmet Fatih (2009-03-22)
On-line preconcentration, speciation and determination of chromium by flame atomic absorption spectrometry(faas) and chemiluminescence
Sürdem, Sedat; Volkan, Mürvet; Department of Chemistry (2004)
Toxicological studies have shown that the degree of toxicity of some elements depends on the chemical form in which the element is present. Chromium (III) is considered as an essential micronutrient for human whereas chromium (VI) is a potentially carcinogenic agent. So the speciation of inorganic chromium in environmental samples is required for accurate assessment of pollution levels. The chromium content in natural water is usually very low, and a preconcentration is often necessary prior to the determin...
Citation Formats
N. Ozyurek, K. Gedik, İ. İmamoğlu, and E. Siltu, “Investigation of PCB levels and sources: The case of Ankara Creek, Turkey,” 2011, vol. 242, Accessed: 00, 2020. [Online]. Available: