Tez özetleri Astronomi ve Uzay Bilimleri Anabilim Dalı

Determination of ²¹⁰Po Activity in Sediment and Biota Samples of Golden Horn
In the thesis study, activity concentrations of ²¹⁰Po were determined in the sediment and mussel (Mytilus galloprovincialis) samples of Golden Horn estuary. Sediment and mussel samples were collected from 13 and 8 stations in the Golden Horn, respectively. Sediment samples were separated to <63 µm and >63 µm – 2 mm particle fractions. In addition, soft tissues of mussel samples were used for analysis. ²¹⁰Po was measured by using an alpha spectrometer after radiochemical separation and deposition of samples. Obtained activity concentrations of ²¹⁰Po were compared with the levels found in literature.
The effect of physico-chemical parameters (particulate fractions, organic matter % and pH) on the ²¹⁰Po accumulation in the sediment samples were evaluated by using statistical tests. At the same time, the effects of measured physico-chemical parameters (temperature, salinity, pH value and dissolved oxygen) of collected water samples on the ²¹⁰Po accumulation in the mussels were examined.
As a results of performed analysis, average activity of ²¹⁰Po, in the mussel samples 91.98 ± 35.42 Bq kg^-1, in the >63 µm sediment samples 55.11 ± 34.05 Bq kg^-1 and in the <63 µm sediment samples 97.92 ± 35.16 Bq kg^-1 were found. It was realized from this study data, it was determined that Golden Horn have not a risk that threats the biological and ecological balance for examined concentrations of ²¹⁰Po in the present study.

  

BAŞTUĞ Berk

Tez Adı : Seleksiyon Ve Melezleme Islahı İle Elde Edilen Yeni Süsen (Irıs L.) Varyete Adaylarının Moleküler Karakterizasyonu

Danışman : Doç. Dr. Tamer ÖZCAN

Anabilim Dalı : Biyoloji

Programı : Botanik

Mezuniyet Yılı : 2013

Tez Savunma Jürisi : Doç. Dr. Tamer ÖZCAN

Prof. Dr. Gül CEVAHİR ÖZ

Prof. Dr. Orhan KÜÇÜKER

Prof. Dr. Celal YARCI

Doç. Dr. Gülriz BAYÇU KAHYAOĞLU