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TÜMSAVAŞ, ZEYNAL

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TÜMSAVAŞ

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ZEYNAL

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2019 - 20202
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    Publication
    Gamma-ray attenuation study for the soils of Bursa, Turkey, in the energy range 59.5-1332.5 keV
    (Springer, 2020-06-08) Gürler, Orhan; Tümsavaş, Zeynal; Tarım, Urkiye Akar; GÜRLER, ORHAN; TÜMSAVAŞ, ZEYNAL; AKAR TARIM, ÜRKİYE; Ziraat Fakültesi; Fizik Bölümü; AAH-1837-2021; AAH-4270-2021; JKS-0298-2023
    In this study, the gamma radiation attenuation was experimentally investigated for soil samples with different texture collected from Bursa Province, Turkey. Firstly, physical and chemical properties (e.g., density, particle size distribution, lime content, organic matter and chemical composition) of these soils were determined by several methods. The transmission measurements of soils performed by using Am-241, Cs-137, Co-60 and Na-22 sources and 2 x 2 inch NaI(Tl) scintillation detector were used to calculate shielding parameters, mass attenuation coefficient, half value layer and tenth value layer values, of these samples in form of pressed powder pellets. The values of these important parameters have been found to vary with gamma-ray energy and chemical composition of the studied soil samples. For instance, the mass attenuation coefficients were decreased with increasing gamma-ray energies and, with the increase in contribution of MgO and Na components, caused better absorption. The effect of compression pressure on attenuation coefficient was also investigated, and better absorption was observed for the sample pressed by high value of press force.
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    A research on the soil characteristics and woody plant species of urban boulevards in Bursa, Turkey
    (Tarbiat Modares Univ, 2019-01-01) Akdeniz, N. Seyidoğlu; SEYİDOĞLU AKDENİZ, NİLÜFER; TÜMSAVAŞ, ZEYNAL; Zencırkıran, M.; ZENCİRKIRAN, MURAT; Ziraat Fakültesi; AAH-1676-2021; AAH-1574-2021
    Proper planning and design of transportation networks in the cities is an important subject, and the avenues, boulevards and refuges in the cities give the cities an aesthetic and functional feature as open green spaces. In addition to their aesthetic qualities, planting in urban areas also plays an important role in preventing pollution and improving air quality in the cities. In this context, the existing woody plant taxa were identified on the boulevards located in Nilufer district of Bursa in Turkey. The soil characteristics and soil heavy metal accumulations of these woody plant taxa were also determined. In the studied boulevards, there were 34 genera, 31 species, 10 subspecies and varieties belonging to 23 families. Among the total woody species gathered, 72.73% of the woody species were tree species and the rest were shrubs. The soils found on the boulevards were usually sandy and clay loam, and inadequate in terms of organic matter contents. On the other hand, the heavy metal deposits in the territories of the boulevards situated in the industrial zones were higher than those in other housing areas but below the permissible values.