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    Wyświetlanie 1-2 z 2
    Tytuł:
    Expression of cellular isoform of prion protein on the surface of peripheral blood lymphocytes among women exposed to low doses of ionizing radiation
    Autorzy:
    Klucinski, P
    Mazur, B.
    Hrycek, A.
    Masluch, E.
    Cieslik, P.
    Kaufman, J.
    Martirosian, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/50336.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    blood lymphocyte
    ionizing radiation
    low dose
    lymphocyte
    cellular isoform
    woman
    radiation exposure
    expression
    prion protein
    Opis:
    Ionizing radiation affects the expression of adhesive and co-stimulatory molecules in lymphocytes. The physiological function of cellular isoform of prion protein (PrPc) is little known. Evidences indicate a link between lymphocytes activation and PrPc expression on their surface; however, no direct effect of radiation on PrPc level in these cells was investigated. The objective of this study was to determinate the effect of low doses of ionizing radiation on the expression of PrPc on the surface peripheral blood lymphocytes in the women operating X-ray equipment. In 36 female workers and 30 persons of the control group the PrPc expression on CD3 (T lymphocytes), CD4 (T helper), CD8 (T cytotoxic) and CD19 (B lymphocytes), as well as the percentage of lymphocytes with PrPc on their surface, were tested. Subgroups with respect to age and length of employment were selected. A signifi cant increase was observed in PrPc expression on CD3 and CD4 with lowered PrPc level on CD8 and percentage of CD8 cells with PrPc in workers compared to control. The PrPc level did not show signifi cant changes in subgroups in relation to age (below and over 40 years old) both in the investigated and control groups, whereas a lower percentage of PrPc expressing CD19 cells showed in employed women below 40 years of age. A signifi cant decrease was found in PrPc expression on the surface of CD3, CD4 and CD8 cells in the subgroup employed for over 10 years than in the subgroup with less than 10 years of employment.
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2007, 14, 2
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Określenie potencjalnych możliwości usuwania związków organicznych w sieci kanalizacyjnej
    Determination of Potential Possibility of Organic Compounds Removal in a Sewer System
    Autorzy:
    Dymaczewski, Z.
    Komorowska-Kaufman, M.
    Krajewski, P.
    Michałkiewicz, M.
    Jeż-Walkowiak, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1817991.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    oczyszczanie ścieków
    system kanalizacyjny
    usuwanie związków organicznych
    wastewater treatment
    sewage system
    organic compounds removal
    Opis:
    The sewerage is an often skipped element of the wastewater treatment system. Because of its high retention capacity and relatively long flow time, it has to be considered that processes affecting wastewater composition and their vulnerability to biological treatment may occur in the sewerage. Changing hydraulic conditions in collectors and numerous side influents providing new portions of wastewater diversified in quantity and quality cause difficulties in a precise description of biochemical transformations occuring during wastewater flow in gravity sewers. The authors conducted research on changes in organic compounds (expressed as total COD) and their dissolved form (soluble COD) in wastewater, during their flow through the laboratory model of a gravity collector. The model is constructed as a cascade of five basins made from acrylic glass, 1.12 L each. Wastewater flowed through the model continuously with the rate of 0.5 L/h. It allowed to achieve the flow time of 11 hours, which is 2-3 times longer than flow times occuring in a typical large sewer network and enabled to take samples in the collector profile. Reaeration process, pH and temperature, as well as the psychro and mezophilic bacteria were also taken into account in the analysis. The results of two research series were presented in the article, i.e. where wastewater flowed continuously through the model for 17 and 33 days, respectively. It was proven that during flow in a collector, a number of processes takes place, including sedimentation, washing out of solid contaminations, removal of dissolved organic compounds and enzymatic hydrolysis of slowly biodegradable organic matter. Biomass growth in bulk wastewater and on the model wall proved that biological processes occur there. There are significant differences between research series, mainly caused by the temperature. It was observed that the amount of biofilm was rather small and did not exceed 5% of total biomass. Removal of total COD was in the range of 28.8-80.3 mg O2/(L h) and soluble COD from 8.5 to 11.5 mg O2/(L h). In the last part of the model, the rate od COD removal decreased due to the lack of substrate, which is in accordance with data given by other researchers.
    Źródło:
    Rocznik Ochrona Środowiska; 2016, Tom 18, cz. 2; 518-529
    1506-218X
    Pojawia się w:
    Rocznik Ochrona Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-2 z 2

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