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    Wyświetlanie 1-3 z 3
    Tytuł:
    The influence of technological PVD process parameters on the topography, crystal and molecular structure of nanocomposite films containing palladium nanograins
    Autorzy:
    Rymarczyk, J.
    Czerwosz, E.
    Kozłowski, M.
    Dłużewski, P.
    Kowalski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/778619.pdf
    Data publikacji:
    2014
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    palladium
    carbon
    SEM
    AFM
    TEM
    FTIR
    Opis:
    The paper describes the preparation and characteristics of films composed of Pd nanograins placed in carbonaceous matrix. Films were obtained in PVD (Physical Vapor Deposition) process from two sources containing: the first one – fullerene powder and the second one – palladium acetate. The topographical, morphological and structural changes due to different parameters of PVD process were studied with the use of Atomic Force Microscopy and Scanning Electron Microscopy, whereas the structure was studied with the application of the Transmission Electron Microscopy and Fourier Transform Infrared Spectroscopy methods. It was shown that topographical changes are connected with the decomposition ratio of Pd acetate as well as the form of carbonaceous matrix formed due to this decomposition. Palladium nanograins found in all films exhibit the fcc structure type and their diameter changes from 2 nm to 40 nm depending on the PVD process parameters.
    Źródło:
    Polish Journal of Chemical Technology; 2014, 16, 3; 18-24
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling of electric current flow in 1D Pd-C nanostructure: comparison with experiment
    Autorzy:
    Bielski, W.
    Kowalczyk, P.
    Czerwosz, E.
    Idzik, A.
    Rymarczyk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/200117.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    nanocomposites
    palladium
    carbonaceous matrix
    homogenization
    Opis:
    In this paper we propose a model of electric current flow through one-dimensional palladium-carbon nanostructure (nanowire) and compare the results of numerical computations with the experimental data. We focus on two aspects: 1) calculation of the current flow through the nanowire model, 2) determination of the macroscopic parameters in the nanocomposite in our model. Because of a complex micro-geometry of a nanowire, we apply the homogenization method to perform the numerical computations.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 3; 465-469
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New slow-release fertilizers - economic, legal and practical aspects: a Review
    Autorzy:
    Wesołowska, M.
    Rymarczyk, J.
    Góra, R.
    Baranowski, P.
    Sławiński, C.
    Klimczyk, M.
    Supryn, G.
    Schimmelpfennig, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/2083050.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    slow-release and controlled-release fertilizers
    national emission ceilings directive
    greenhouse gas emissions
    NH3 emisions
    Opis:
    The improper adjustment of the release characteristics of commonly used mineral fertilizers to the nutritional requirements of plants results in the loss of a significant part of them by infiltration into the soil profile or in the form of greenhouse gas emissions into the atmosphere. Legal regulations including the national emission ceilings directive, require the Member States of European Union to limit ammonia emissions from agriculture. In order to minimize the losses of valuable nutrients and to reduce greenhouse gas emissions it is necessary to find new solutions and technologies in agriculture. Specialists emphasize the beneficial effects of localized fertilization methods and the use of the slow-release/controlled-release fertilizers. Field studies conducted on newly obtained fertilizers prove their beneficial effect on the quality and quantity of the crop but currently the products offered on the market are too expensive to use in large acreage crops. This article presents an overview of some particular economic, legal and practical aspects of slow-release fertilizer production and use. Additionally, the results of field tests indicating their beneficial effect on plant yield, the plant response to stressful conditions and methods for environmental protection are also presented.
    Źródło:
    International Agrophysics; 2021, 35, 1; 11-24
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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