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    Wyświetlanie 1-4 z 4
    Tytuł:
    Irradiation of austenitic steel 10Cr12Mn14Ni4AlMo and titanium alloy Ti-Al-V by pulsed streams of fast nitrogen ions and plasma in a dense plasma focus
    Autorzy:
    Gribkov, V. A.
    Pimenov, V. N.
    Roschupkin, V. V.
    Maslyaev, S. A.
    Demina, E. V.
    Lyakhovitsky, M. M.
    Dubrovsky, A. V.
    Sasinovskaya, I. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/971548.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    radiation
    damage
    phase transition
    nanohardness
    dense plasma focus (DPF)
    Opis:
    Austenitic steel 10Cr12Mn14Ni4AlMo and Ti-4Al-3V alloy were irradiated with nanosecond pulsed nitrogen ion and plasma streams in plasma focus devices. The two different modes of the treatment were applied: high power density (greater-than or equal to 10 8 W/cm2) irradiation with melting of the surface layer and irradiation with power density similar to 10 7 W/cm2 below the melting threshold. Structure and phase changes as well as the mechanisms of modification and hardening of the surface layers of the steel and titanium alloy upon applied irradiation are discussed.
    Źródło:
    Nukleonika; 2012, 57, 2; 291-295
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of the effects of bleomycin and ionizing radiation in two sublines of murine lymphoma L5178Y
    Autorzy:
    Kruszewski, M.
    Zaim, J.
    Grądzka, I.
    Szumiel, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/147561.pdf
    Data publikacji:
    2001
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    bleomycin
    comet assay
    DNA damage
    gamma radiation
    single cell gel electrophoresis
    Opis:
    We compared the effects of bleomycin (BLM) and ionizing radiation on two sublines of murine lymphoma L5178Y (LY): LY-R, radiation resistant and LY-S, radiation sensitive. This radiosensitivity difference is related to the ability to rejoin DNA double strand breaks. LY-S cells were about two times more sensitive to BLM than LY-R, similarly as in the case of sensitivity to X rays. Since there was no difference in the P-glycoprotein-related drug transport system between the sublines, it could be expected that the enhanced sensitivity of LY-S cells to BLM was caused by the DNA repair defect. Growth disturbances in BLM treated cell populations were proportional to the lethal effect and their duration was observed until elimination of dead cells (3-6 days after 50 ěM BLM, 1 h at 37oC). There was no slow growth phase accompanied by normal viability, as previously described for X-irradiated LY-S cells. Initial DNA damage, estimated with the single cell gel electrophoresis method was linearly related to BLM dose in LY-S cells; in LY-R cells - in the low dose range (up to 10 ěM) - there was more damage than in LY-S cells, however, at higher doses the dose - effect curves became identical. The doseeffect relationship for ă rays was linear and identical in both cell sublines. DNA damage distribution in BLM treated cells was much less uniform as compared to that in irradiated cells and indicated the presence of cells with severely damaged DNA, a feature typical for BLM action in vitro.
    Źródło:
    Nukleonika; 2001, 46, 3; 81-86
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characterization of dense plasma streams generated by MPC and their interaction with material surfaces
    Autorzy:
    Makhlaj, V. A.
    Chebotarev, V. V.
    Chuvilo, A. A.
    Garkusha, I. E.
    Ladygina, M. S.
    Marchenko, A. K.
    Petrov, Y. V.
    Solyakov, D. G.
    Powiązania:
    https://bibliotekanauki.pl/articles/147528.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    magneto-plasma compressor (MPC)
    gas-discharge plasma
    plasma streams
    mixture gas
    EUV radiation
    surface damage
    Opis:
    Comparative studies of the parameters both pure helium and helium-xenon plasma have been fulfilled in a magneto-plasma compressor (MPC). The current-voltage characteristics of MPC accelerating channel and the maximum plasma velocity of (6-8) x 106 cm/s changed negligibly under local xenon injection to compression zone. Nevertheless, the xenon addition causes a growth of maximal plasma pressure up to of 2.3 MPa, an increase of plasma radiation from the compression zone. The plasma density achieved 1018 cm.
    Źródło:
    Nukleonika; 2012, 57, 2; 197-200
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    DNA damage in subpopulations of human lymphocytes irradiated with doses in the range of 0-1 Gy of X-radiation
    Autorzy:
    Wojewódzka, M.
    Machaj, E. K.
    Goździk, A.
    Iwaneńko, T.
    Ołdak, T.
    Kruszewski, M.
    Pojda, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/147760.pdf
    Data publikacji:
    2008
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    alkaline comet assay
    biodosimetry
    micronucleus test
    histone gammaH2AX foci immunofluorescence assay
    T lymphocytes
    B lymphocytes
    ionizing radiation
    DNA damage
    Opis:
    We compared three methods usually applied in biological dosimetry for estimation of radiation-induced DNA damage in human T and B lymphocytes: alkaline comet assay, micronucleus (MN) test and formation of histone gamma-H2AX foci. Human peripheral blood lymphocytes were fractionated using T cells and B cells isolation kits. Cells were irradiated with doses in the range of 0-1 Gy of X-rays. Induction of DNA damage was assessed by the standard alkaline comet assay, MN test and histone gammaH2AX foci immunofluorescence assay. Notwithstanding different end-points measured by the applied methods, all tests revealed a similar induction of DNA damage in B lymphocytes as compared with T lymphocytes. The results indicated that all three tests detect DNA damage with similar sensitivity, the lowest dose being approximately 0.3 Gy. The difference between irradiated and control cells was expressed as the ratio of the value obtained for irradiated cells (1 Gy) to that for control cells. The highest ratio was obtained for formation of gammaH2AX foci and was 6.2 for T and 13.8 for B lymphocytes, whereas those for comet assay and micronucleus test were 3.5; 3.6 and 5.6; 4.8, respectively.
    Źródło:
    Nukleonika; 2008, 53, 4; 145-149
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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