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    Wyświetlanie 1-3 z 3
    Tytuł:
    Instrumental neutron activation analysis (INAA) for steel analysis and certification
    Autorzy:
    Polkowska-Motrenko, H.
    Chajduk, E.
    Danko, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/147648.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    steel analysis
    neutron activation analysis (NAA)
    proficiency testing/interlaboratory comparison (PT/ILC)
    certification of steel reference materials
    Opis:
    Instrumental neutron activation analysis (INAA) procedure of elemental steel analysis has been elaborated. The reliability of results obtained by the described procedure has been proved in the frame of different proficiency testing/interlaboratory comparison (PT/ILC) programmes, in which the Institute of Nuclear Chemistry and Technology (INCT, Warsaw) took part since 2005. This work summarizes participation of INCT in these exercises and demonstrates the usefulness of INAA to the certification of steel reference materials.
    Źródło:
    Nukleonika; 2011, 56, 4; 311-315
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of neutron activation for investigation of Fe3O4 nanoparticles accumulation by plants
    Autorzy:
    Bystrzejewska-Piotrowska, G.
    Asztemborska, M
    Stęborowski, R.
    Polkowska-Motrenko, H.
    Danko, B.
    Ryniewicz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/146840.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    iron (II,III) oxide
    nanoparticles
    neutron activation
    plants
    Opis:
    As a result of the rapid development of nanotechnology and increasing application of nanoproducts in many areas of everyday life, there is a growing risk of production of nanowastes potentially dangerous for the environment. This makes it necessary to investigate the accumulation and toxicity of nanoparticles (NPs) at different trophic levels. In the studies neutron activation was applied for the investigation of iron (II,III) oxide nanoparticle (Fe3O4-NPs) accumulation by Lepidium sativum and Pisum sativum L. Plants were cultivated on growth medium contaminated with different concentrations (0.01-10 mmolźL-1) of Fe3O4-NPs. For the identification of the presence of Fe3O4-NPs in plant tissues gamma spectrometry following iron oxide (II,III) nanoparticles irradiation was applied. Both plant species were found to accumulate iron (II,III) oxide nanoparticles. The highest content of NPs was found in plant roots, reaching 40 g/kg for Pisum sativum L. More than 90% of accumulated NPs were found in roots. Accumulation of Fe3O4-NPs was found to depend on the concentration of nanostructures in the growth medium. The transfer factor for Lepidium sativum roots and shoots and Pisum sativum L. shoots decreased with increasing NP concentration in the medium; for Pisum sativum L. roots the tendency was reversed. Neutron activation of nanoparticles was shown to be a powerful tool for tracing the environmental fate of NPs and their uptake and accumulation in organisms.
    Źródło:
    Nukleonika; 2012, 57, 3; 427-430
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A study on chemical composition of Baszkówka and Mt. Tazerzait chondrites
    Autorzy:
    Dybczyński, R.
    Chwastowska, J.
    Danko, B.
    Kulisa, K.
    Polkowska-Motrenko, H.
    Samczyński, Z.
    Sterlińska, E.
    Szopa, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059297.pdf
    Data publikacji:
    2001
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Baszkówka
    Tazerzait Mountains
    meteorites
    chondrites
    neutron activation analysis
    speciation
    cosmochemistry
    Opis:
    The elemental contents of two new meteorites, Baszkówka (Poland, 1994) and Mt.Tazerzait (Niger, 1991), were studied by instrumental and radiochemical neutron activation analysis (NAA), supplemented in the case of some elements by gravimetric, titrimetric, spectrophotometric and atomic absorption spectrometric measurements. In total 28 elements were determined for each meteorite. A striking similarity in the bulk chemical composition of the two meteorites was observed. In the case of Baszkówka some study of the elemental contents of the magnetic fraction and the distribution of elements between kamacite and taenite phases was also made. This study confirms that Baszkówka and Mt. Tazerzait are generally more similar to L chondrites than to any other class of chondrites. However both meteorites show also some distinctive features (e.g very low Hg content), distinguishing them from all other L chondrites known. Both meteorites may derive from a common parent body, which may be different from that typical for other chondrites.
    Źródło:
    Geological Quarterly; 2001, 45, 3; 289-302
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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