Yazar "Topcuoglu, Sayhan" seçeneğine göre listele

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    Radioactivity concentrations and dose assessment in surface soil samples from east and south of Marmara region, Turkey
    (Oxford Univ Press, 2008) Kilic, Onder; Belivermis, Murat; Topcuoglu, Sayhan; Cotuk, Yavuz; Coskun, Mahmut; Cayir, Akin; Kucer, Rahmi
    The activity concentrations of (137)Cs, (40)K, (232)Th, (238)U and (226)Ra were measured in surface soil samples from East and South of Marmara region, Turkey. The physico-chemical parameters (organic matter, CaCO(3) contents and pH-value) of the soil samples were determined in the samples collected from 100 sampling stations. The average activity concentrations of (137)Cs, (40)K, (232)Th, (238)U and (226)Ra were found to be 27.46 +/- 21.84, 442.51 +/- 189.85, 26.63 +/- 15.90, 21.77 +/- 12.08 and 22.45 +/- 13.31 Bq kg(-1), respectively. The mean value of total annual external gamma radiation dose equivalent for the natural radionuclides was calculated to be 54.86 mu Sv. The current data were compared with those found in the other locations of Turkey and different countries.
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    Öğe
    Radioactivity concentrations in topsoil samples from the Thrace region of Turkey and assessment of radiological hazard
    (Taylor & Francis Ltd, 2008) Belivermis, Murat; Kilic, Onder; Cotuk, Yavuz; Topcuoglu, Sayhan; Coskun, Mahmut; Cayir, Akin; Kucer, Rahmi
    The activity concentrations of gamma emitting radionuclides were measured in surface soil samples from the Thrace region. 232Th, 238U, 226Ra, 40K and 137Cs activities and physico-chemical parameters of the soil samples were determined in samples collected from 73 sampling stations. Radionuclide concentrations measured were compared with those found in the samples from other locations of Turkey and from different countries. The average activity concentrations of 232Th, 238U, 226Ra, 40K and 137Cs were found to be 24.718.79, 22.307.93, 32.0912.44, 509.00160.05, 32.7429.24Bqkg-1, respectively. The mean value of the annual effective dose equivalent from the outdoor terrestrial gamma radiation was calculated as 57.2 Sv.
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    Öğe
    The seasonal distribution of heavy metals in Mussel sample from Yalova in the Marmara Sea, 2008-2009
    (Springer, 2011) Culha, Saniye Turk; Kocbas, Fatma; Gundogdu, Ayse; Baki, Birol; Culha, Mehmet; Topcuoglu, Sayhan
    Concentration of the some heavy metals (Co, Cu, Fe, Ni, Pb and Zn) Mediterranean mussel Mytilus galloprovincialis from Yalova (Marmara Sea) were investigated seasonally. The mean concentrations of Co, Cu, Fe, Ni, Pb and Zn in the soft tissues were 4.08 +/- 0.67, 5.54 +/- 0.59, 156.72 +/- 20.18, 3.71 +/- 1.14, 2.92 +/- 0.51 and 106.23 +/- 5.66 mg kg (-aEuro parts per thousand 1) dry weights, respectively. There were no significant differences between the metal concentrations among the seasons (P > 0.05). The mean Pb and Zn concentrations were higher than the acceptable limit proposed by International Turkish standards.