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    Wyświetlanie 1-4 z 4
    Tytuł:
    Demographic processes: past, present and future − selected issues
    Autorzy:
    Fratczak, E.Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/11970.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    This papers refers to demographic processes in the period from the 19th century through to the present and tries to define what they will look like in the future. Demographic trends i.a. relating to fertility, mortality, migrations, the process of family-union-household formation and dissolution, and the process of population ageing, are described by the concepts of demographic transformations: first, second and third. The transformation of demographic trends has coexisted and will coexist with globalization processes, though the scope of the mutual influence changes over time. Despite the fact that it takes place in various geographical regions, the transformation of demographic trends is characterised by high cultural diversity and socio-economic development.
    Źródło:
    Papers on Global Change; 2013, 20
    2300-8121
    1730-802X
    Pojawia się w:
    Papers on Global Change
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Study of $α^{\prime\prime}$ and $γ^{\prime\prime}$-Phases of Iron Nitride Thin Films
    Autorzy:
    Frątczak, E.
    Prieto, J.
    Moneta, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1368214.pdf
    Data publikacji:
    2014-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.15.Hi
    68.55.-a
    61.05.Qr
    Opis:
    Most of the Fe-nitride phases have been studied in much detail. Nevertheless, there is still a debate about the most efficient, exact and controlled way of obtaining thin films of the desired iron nitride phases. Thin films of iron nitrides were deposited by Molecular Beam Epitaxy in Ultra High Vacuum. By changing the growth parameters we tried to obtain the α"-phase in its purest form. We worked also on iron mononitride, FeN (γ"-FeN) which is known to exist in different phases. The stoichiometry of the samples was determined by means of resonant Rutherford Backscattering Spectroscopy. The samples were studied by room temperature Conversion Electron Mössbauer Spectroscopy. We achieved as much as 24% of pure α"-phase and provide evidence of the existence of γ"-FeN with vacancies and of the transformation of nonmagnetic γ"-phase into magnetic ε-phase after time exposure.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 1; 214-215
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sputtering and Implantation of VV-6025X Surface with Slow Heavy Ions Monitored with PIXE
    Autorzy:
    Antoszewska, M.
    Balcerski, J.
    Brzozowski, R.
    Dolecki, K.
    Frątczak, E.
    Gwizdałła, T.
    Pawłowski, B.
    Moneta, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1367499.pdf
    Data publikacji:
    2014-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    34.35.+a
    61.80.Lj
    Opis:
    In this work the characteristic radiation, emitted during interaction of medium energy (200 keV) ambient heavy ions (Ar) with $Fe_{4}Co_{66}Si_{12}B_{14}Nb_{1}Mo_{2}Cu_{1}$ (VV-6025X) amorphous alloy, was measured in grazing incident-exit angle geometry and in time sequence, in order to determine dynamics of formation of subsurface region, damaged through implantation, sputtering and interface mixing. It was shown that structure and composition of surface is unstable against heavy ions irradiation due to preferential sputtering and implantation of ions, and recoils, and that the dynamics of such modification can be monitored in-situ with particle induced X-ray emission (PIXE) method.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 1; 136-137
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Denticles. A literature review
    Autorzy:
    Kisiel, M.
    Laszewicz, J.
    Frątczak, P.
    Dąbrowska, B.
    Pietruska, M.
    Dąbrowska, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1917630.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Medyczny w Białymstoku
    Tematy:
    teeth
    denticles
    Opis:
    Denticles are pulp degenerations in the form of calcified deposits of mineral salts, usually found in molars and lower incisors, as well as in impacted teeth and deciduous molars. Denticles may come in various sizes, from microscopic particles to larger mass that almost obliterate the pulp chamber and are visible only on X-ray images. Denticles form as a result of chronic inflammatory lesions, but may also be caused by injuries and conservative treatment. They are most frequently found in necrotic foci. Denticles may cause problems for root canal treatment, as their presence might make it difficult to obtain proper access to the pulp chamber bottom and the canal orifices. There is also the increased risk of bending or breaking the endodontic instruments. Sometimes, denticles fill the entire space of the tooth chamber and pushing the pulp to the edges of the chamber. Denticles can cause pain due to the pressure on the nerves and blood vessels supplying the internal tissue of the tooth. The presence of large denticles might eventually lead to necrosis of the pulp. Denticles accompany certain diseases, such as dentin dysplasia, odontodysplasia or Albright hereditary dystrophy.
    Źródło:
    Progress in Health Sciences; 2015, 5, 2; 200-204
    2083-1617
    Pojawia się w:
    Progress in Health Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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