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    Wyświetlanie 1-6 z 6
    Tytuł:
    Structure Studies on Mechanically Alloyed $Ni_{50}Ti_{50-x}Mo_{x}$ (x=10, 25, 40 at.%) Systems during Milling and after Annealing
    Autorzy:
    Panek, J.
    Karolus, M.
    Piasecki, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1398359.pdf
    Data publikacji:
    2016-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.07.Bc
    81.10.Jt
    81.20.Ev
    Opis:
    The subject of this study is the phase composition evolution of $Ni_{50}Ti_{50-x}Mo_x$ (x=10, 25, 40 at.%) systems prepared by mechanical alloying in as-milled state and after subsequent heat treatment. During milling a mechanically induced solid state reaction between nickel, titanium and molybdenum was observed leading to the formation of nanocrystalline disordered solid solutions. As a result of heat treatment a creation of NiMo intermetallic phase was observed as well as structure relaxation of previously formed solid solutions.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 4; 1066-1068
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural characterization and magnetic properties of CuCr₂Te₄ spinel obtained by mechanical alloying and heat treatment
    Autorzy:
    Karolus, M.
    Maciążek, E.
    Panek, J.
    Kubisztal, M.
    Groń, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1154138.pdf
    Data publikacji:
    2016-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Gg
    75.50.Tt
    81.10.Jt
    Opis:
    CuCr₂Te₄ can be obtain by mechanical alloying followed by heat treatment. The obtained phase crystallizes in the spinel-type structure of the space group Fd3m. The calculated crystallite size equals to 100 nm. Magnetic susceptibility measurements showed ferrimagnetic order below 21 K.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 4; 859-861
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and Magnetic Properties of $CuCr_{1.65}Se_4$ Nanoparticles
    Autorzy:
    Maciążek, E.
    Panek, J.
    Kubisztal, M.
    Karolus, M.
    Groń, T.
    Duda, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1376067.pdf
    Data publikacji:
    2014-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Gg
    75.50.Tt
    81.10.Jt
    Opis:
    $CuCr_{1.65}Se_{4}$ nanoparticles crystallize in the monoclinic $Cr_{2}Se_{3}$-type structure of the space group I2/m. The average crystallite size basing on the line broadening is less than 10 nm. With decrease of the size of grains a change from ferromagnetic to ferrimagnetic order, a lack of the magnetization saturation and a strong spin-orbit coupling visible in the large value of the Landé factor $g_{χ}$ = 2.72 are observed. The change in magnetic order is caused by the change of the crystalline symmetry from the cubic phase to monoclinic one.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 5; 1137-1139
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of 60 MeV Protons and 250 kV X-Rays on Cell Viability
    Autorzy:
    Miszczyk, J.
    Panek, A.
    Rawojć, K.
    Swakoń, J.
    Prasanna, P.
    Rydygier, M.
    Gałaś, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1398817.pdf
    Data publikacji:
    2016-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.50.-a
    87.53.-j
    87.53.Bn
    Opis:
    Particle radiotherapy such as the one using proton beams, provides a successful treatment approach in many cancer types. However, the cellular and molecular mechanisms by which proton irradiation induces cell death, particularly in a human peripheral blood lymphocyte model has not been examined in detail. Comparative studies of the biological effects, such as cell death, of particle therapy versus conventional X-rays treatment are of utmost importance. Here, we compared the viability of human peripheral blood lymphocyte following in vitro irradiation with protons (therapeutic 60 MeV proton beam) and photon beam (250 kV, X-rays), by applying separate doses within the range of 0.3-4.0 Gy. Cell viability was assessed 1 and 4 h after irradiation with protons and X-rays by the FITC-Annexin V labelling procedure (Apoptotic & Necrotic & Healthy Cells Quantification Kit, Biotium). Results showed that irradiation with both radiation types reduced the number of viable cells in a dose-dependent manner, as assessed as a function of the duration of post-irradiation time. Protons proved more fatal to the cells treated than X-ray photons. This demonstrates a difference in cell viability after irradiation with protons and photons in a human peripheral blood lymphocyte model.
    Źródło:
    Acta Physica Polonica A; 2016, 129, 2; 222-225
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Applications of Comet Assay for the Evaluation of Genotoxicity and DNA Repair Efficiency in Nanomaterials Research
    Autorzy:
    Panek, A.
    Błażewicz, M.
    Frączek-Szczypta, A.
    Adamczyk, J.
    Wiltowska-Zuber, J.
    Paluszkiewicz, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030633.pdf
    Data publikacji:
    2018-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.53.-j
    87.85.jj
    87.14.gk
    Opis:
    The single cell gel electrophoresis method, known as comet assay, is a rapid and sensitive technique for testing novel chemicals and nanoparticles for genotoxicity, monitoring environmental contamination with genotoxins and human biomonitoring. In our studies we check the applicability of this method for the evaluation of biocompatibility of modified (MWNF) and non-modified multi-walled carbon nanotubes (MWNT) as well as potential genotoxicity of mercury(II) nitrate. The obtained results enabled us to conclude that the presence of Hg(NO₃)₂ (p<0.001) and MWNT (p<0.04) cause a significantly higher level of DNA damage in comparison to functionalised nanomaterials MWNF. It was implied that for the three investigated agents only mercury significantly enhanced genotoxic effect of X-ray exposure (p<0.001) and inhibition of radio-induced DNA damage repair. On the contrary, the presence of MWNF have no influence on cellular repair efficiencies, while incubation with MWNT causes apoptosis and consequently results in lack of attached cells. In conclusion, our results confirmed the genotoxicity of mercury and non-modified carbon nanotubes as well as the biocompatibility of modified nanotubes. Additionally, we proved the usefulness of comet method for the evaluation of genotoxicity and DNA repair under the influence of different compounds and nanomaterials.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 2; 280-282
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Interface and Surface Subsignals in Photoreflectance Spectra for GaAs/SI-GaAs Structures
    Autorzy:
    Jezierski, K.
    Sitarek, P.
    Misiewicz, J.
    Panek, M.
    Ściana, B.
    Korbutowicz, R.
    Tłaczała, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1933782.pdf
    Data publikacji:
    1995-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    68.55.-a
    71.35.+z
    Opis:
    Photoreflectance spectra were measured at room temperature for energies in the vicinity of the E$\text{}_{0}$ critical point for p-type as well as n-type doped GaAs/SI-GaAs structures. Depending on the doping concentration the existence of two photoreflectance subsignals was observed; the first one arises from the surface space charge region while the second one from the interface region. The decomposition of photoreflectance spectrum into surface and interface subsignals was based on the photoreflectance measurements carried out for different wavelengths of the laser pump beam.
    Źródło:
    Acta Physica Polonica A; 1995, 88, 4; 751-754
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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