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    Wyświetlanie 1-4 z 4
    Tytuł:
    Postępy w laboratoryjnej kontroli leczenia doustnymi antykoagulantami
    Autorzy:
    Łopaciuk, S.
    Kopeć, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2187431.pdf
    Data publikacji:
    1988
    Wydawca:
    Polskie Towarzystwo Diagnostyki Laboratoryjnej
    Tematy:
    choroby czlowieka
    zakrzepica
    leczenie
    leki przeciwzakrzepowe
    antykoagulanty
    kontrola leczenia
    badania laboratoryjne
    badania krwi
    czas protrombinowy
    dobor tromboplastyny
    system INR/ISI
    Źródło:
    Diagnostyka Laboratoryjna; 1988, 24, 2; 90-101
    0867-4043
    Pojawia się w:
    Diagnostyka Laboratoryjna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Quasi-Static and Dynamic Testing of Carbon Fiber Reinforced Magnesium Composites
    Autorzy:
    Ranachowski, Z.
    Ranachowski, P.
    Brodecki, A.
    Kopeć, M.
    Kudela, S. jr.
    Powiązania:
    https://bibliotekanauki.pl/articles/351742.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Mg matrix composite
    compressive properties
    carbon fiber
    Split-Hopkinson Pressure Bar
    Opis:
    Two types of composites, consisting of pure magnesium matrix reinforced with two commercially used carbon fibers, were systematically studied in this paper. The composites fabricated by the pressure infiltration method, were subjected to quasistatic and dynamic compression tests. Morphology of fiber strands was observed using scanning electron microscope (SEM). The application of carbon fibre reinforcement led to the stiffening of tested materials, resulting in the limitation of the possible compression to approx. 2.5%. The performed tests revealed the remarkable difference in compression strength of investigated compositions. The cause of that effect was that GRANOC fiber reinforced composite exhibited insufficient bond quality between the brittle fibers and the ductile matrix. T300 reinforced composite presented good connection between reinforcement and matrix resulting in increased mechanical properties. Investigated composites demonstrated higher mechanical strength during deformation at high strain rates. Microscopic observations also proved that the latter fibers with regular shape and dense packaging within the filaments are proper reinforcement when designing the lightweight composite material.
    Źródło:
    Archives of Metallurgy and Materials; 2020, 65, 2; 893-899
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Chemical, Magnetic and X-Ray Diffraction Studies of the Sediments from Oil Field in Argentina
    Autorzy:
    Kopeć, M.
    Kąc, M.
    Bałanda, M.
    Budziak, A.
    Kąc, S.
    Perzanowski, M.
    Góra, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1490262.pdf
    Data publikacji:
    2012-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    82.80.Ej
    89.20.Bb
    89.30.aj
    Opis:
    Chemical, magnetic, and phase composition analysis of deposits taken from sedimentation tank from oil plant in Argentina was carried out. Energy dispersive spectroscopy indicates iron as a main sediment component with the site dependent fraction ranging from 11% to 78% (weight percentage). Moreover, large fractions of sulfur (4%-33%), oxygen (8%-28%), calcium (1%-14%), and silicon (1%-11%) were found. The chemical analysis performed with wet chemical methods also indicated Fe as a main component (about 35%), additionally a large fraction ( ≈ 15%) of the sulfur and under 10% fractions of calcium ( ≈ 7%), carbon ( ≈ 6%), and silicon ( ≈ 5%) were found in the sample. The phase composition studies performed using X-ray diffraction showed magnetite - $Fe_3O_4$, goethite - α-FeOOH, lepidocrocite - γ-FeOOH, siderite - $FeCO_3$, and iron-sulfur compounds (mackinawite - FeS, stoichiometric FeS, greigite - $Fe_3S_4$) and other compounds like aragonite - $CaCO_3$, calcite - $CaCO_3$, anorthite - $CaAl_2Si_2O_8$, quartz - $SiO_2$ and barium sulphate $Ba(SO_3)_{0.3}(SO_4)_{0.7}$. Studies performed by the Mössbauer spectroscopy, confirmed presence of majority of compounds identified by X-ray diffraction. Magnetic AC susceptibility measurements show that magnetite is a main component of the studied deposit. High concentration of the magnetic compounds deposited in the sedimentation tank points to the advisability to install the magnetic device designed to support water treatment processes, i.e.: flocculation, coagulation, sedimentation, and filtration. This device could simultaneously inhibit microbiological and chemical corrosion.
    Źródło:
    Acta Physica Polonica A; 2012, 121, 2; 566-570
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of Sediments Causing Damage to Water Meters in a Large Drinking Water Distribution System
    Autorzy:
    Kopeć, M.
    Roman, M.
    Kąc, M.
    Budziak, A.
    Paluszkiewicz, C.
    Zarzycki, A.
    Kąc, S.
    Dutkiewicz, E.
    Cichoń, T.
    Bochnia, T.
    Kwiatek, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030652.pdf
    Data publikacji:
    2018-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    89.60.-k
    78.70.En
    61.05.cp
    82.80.-d
    82.80.Gk
    Opis:
    Preliminary studies on the sediments collected from water meters of Krakow water supply system were performed in the cooperation with the Municipal Water Supply and Sewage. Creation and deposition of sediments on the measuring devices installed in the water supply system is a serious technological and economical problem for water companies, defectively operating for this reason water meters must be replaced. It is evident that knowledge of the chemical and phase composition of sediments is an important step towards resolving the problem of impurities in water supply systems. Four different samples of sediments, coming from water meters, were investigated using the proton-induced X-ray emission, the X-ray diffraction, the Fourier transform infrared and Raman spectroscopy. The X-ray methods revealed presence of amorphous and fine-crystalline phases as well as high content of iron-based compounds. As a crystalline phase, the most frequently appeared: goethite, lepidocrocite, iron oxides (hematite, maghemite, magnetite), calcium carbonate, and quartz. In one of the samples, the nanocrystalline phase was found and identified as hydrous iron oxyhydroxide ferrihydrite. Vibrational spectroscopy methods confirmed the composition of crystalline phases as well as enabled to estimate the abundance of amorphous phase in samples.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 2; 296-301
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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