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    Wyświetlanie 1-4 z 4
    Tytuł:
    Magnetism and Crystal Field in PrCuAl₃ and NdCuAl₃
    Autorzy:
    Novák, P.
    Diviš, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1032630.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.15.Mb
    71.20.Lp
    71.70.Ch
    Opis:
    During the last five years we developed method to calculate crystal field and magnetism of rare-earth ions in solids. The method is fully ab initio with the exception of a single parameter which adjust the position of f states relative to other valence states and it was successfully applied in insulating systems. In this contribution the method is used to explain multiplet splitting and magnetism in PrCuAl₃ and NdCuAl₃ intermetallics. For the Nd compound the agreement between theory and experiment is good, while for the PrCuAl₃ the agreement is less satisfactory which can be due to the more delocalized 4f electrons of Pr³⁺ comparing to Nd³⁺ ion.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 964-966
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Electronic Structure of $PrCo_2Ge_2$
    Autorzy:
    Diviš, M.
    Vejpravová, J.
    Rusz, J.
    Prokleška, J.
    Sechovský, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/1813659.pdf
    Data publikacji:
    2008-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.15.Mb
    71.70.Ch
    Opis:
    The intermetallic compound $PrCo_2Ge_2$ exhibits very interesting physical properties: antiferromagnetism below $T_N$ = 28 K, an order to order transition at $T_R$ = 8 K, a rich magnetic phase diagram, and huge magnetocrystalline anisotropy as observed by recent experiments on a single crystal in a magnetic field up to 14 T. We performed first principles calculations based on the density functional theory. The localized $4f^2$ configuration of $Pr^{3+}$ was treated using the open core approximation. The electronic densities of states were obtained and the position of the Fermi level was found. The hybridization between the Co-3d, Pr-5d and Ge-4p states is discussed. The calculated magnetic moment of Co is found to be quite small $(m_{Co} < 0.1 μ_B)$. The first principles calculations of the crystal field interaction were performed as well: the obtained crystal field parameters were used as the starting parameters for further refinement in comparison with experimental data of the magnetic susceptibility and specific heat. The crystal field splitting of the 4f states was determined.
    Źródło:
    Acta Physica Polonica A; 2008, 113, 1; 295-298
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Elemental analysis as a tool for classification of Czech white wines with respect to grapevine varieties
    Autorzy:
    Porizka, J.
    Divis, P.
    Dvorak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/15133.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
    Źródło:
    Journal of Elementology; 2018, 23, 2
    1644-2296
    Pojawia się w:
    Journal of Elementology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Elemental composition of fruits from different Black elder (Sambucus nigra L.) cultivars grown in the Czech Republic
    Autorzy:
    Divis, P.
    Porizka, J.
    Vespalcova, M.
    Matejicek, A.
    Kaplan, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/958241.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
    Tematy:
    elemental composition
    fruit
    elderberry
    black elder zob.elderberry
    European elder zob.elderberry
    European elderberry zob.elderberry
    European black elderberry zob.elderberry
    Sambucus nigra
    plant cultivar
    Czech Republic
    Opis:
    Black elder is a deciduous shrub widely used in medicine, pharmacy and food industry. This study presents a comparison of the elemental composition of fruits (berries) from the Black elder (Sambucus nigra L.) cultivars Albida, Bohatka, Dana, Heidegg13, Mammut and Sambo, grown in the Czech Republic and harvested in two seasons (2011 and 2013). The fruits were collected at full maturity from an experimental orchard at the Research and Breeding Institute of Pomology, Holovousy Ltd. The raw material was decomposed using hot nitric acid and the determination of the elemental content (Ca, K, P, Zn. Cu, Mn, Na, Mg) was performed by inductively coupled atomic emission spectrometry in accordance with a valid ISO standard. Concentration of all the analyzed elements in the various Sambucus nigra cultivars was different, and the differences were statistically significant (p < 0.05). All the investigated cultivars were a good source of major and trace elements. The concentration of the analyzed elements in Sambucus nigra decreased in the following order K > Ca > P > Mg > Na > Fe > Mn > Zn > Cu. The results demonstrated that Sambucus nigra fruits can be used as functional food in prevention and treatment of diseases associated with deficiency of elements in the human diet. On average, 100 g of Sambucus nigra fruits can cover about 20% of the recommended dietary allowance of main elements for women and men. In terms of the content of individual elements, the cultivars Albida and Sambo have proven to be most promising. The chemical composition of Sambucus nigra varied with the year of harvest, but the variation in the elemental content did not exceed 20% in most cases.
    Źródło:
    Journal of Elementology; 2015, 20, 3
    1644-2296
    Pojawia się w:
    Journal of Elementology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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