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    Wyświetlanie 1-6 z 6
    Tytuł:
    An investigation of the preparation and performance of microcellular combustible material
    Autorzy:
    Yang, W.
    Li, Y.
    Ying, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/358391.pdf
    Data publikacji:
    2014
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    microcellular combustible material
    supercritical CO2
    pressure quench method
    vulnerability behaviour
    closed vessel test
    Opis:
    Microcellular combustible materials, based on poly(methyl methacrylate) (PMMA) bonded RDX, were fabricated by the pressure quench method using supercritical CO2. After foaming, the bulk density, porosity, expansion ratio and cell density were analyzed. Scanning Electron Microscopy (SEM) has also been used to investigate the influence of the foaming conditions (temperature, saturation pressure and depressurization time) and the RDX ratio on the porous structure. The skin-core structure was also observed after the pressure quench process. The mechanical sensitivities and burning performance were investigated by the friction sensitivity test, the impact sensitivity test and the closed vessel test, respectively.
    Źródło:
    Central European Journal of Energetic Materials; 2014, 11, 2; 257-269
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling and Calculation of the Initial Ignition Gas Pressure Flow through a Rigid Porous Medium in a 100 mm Ignition Simulator
    Autorzy:
    Xiao, Z.
    Ying, S.
    He, W.
    Xu, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/358563.pdf
    Data publikacji:
    2014
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    ignition
    ignition simulator
    porous media
    propellant
    modelling
    simulation
    Opis:
    To acquire a better understanding of the early ignition phenomena in a 100 mm ignition simulator loaded with a packed propellant bed, a theoretical model of the ignition gas flow through the rigid porous medium was developed. Three pressure gauges were installed in the lateral side of the ignition simulator for post ignition measurement of the chamber pressure. The pseudo-propellant loaded into the chamber was similar in size to the standard 13/19 single-base cylindrical propellant. It was composed of a rigid ceramic composite with low thermal conductivity. It was assumed that the pseudo-propellant bed was rigid in contrast to the assumption of an elastic porous medium. The calculated pressure values were well verified by the experimental data at a low loading density of the pseudo-propellant bed of 0.18 g•cm-3. However, there was still error between the experimental and the calculated results in the early pressure peak position closest to the ignition primer when the loading density of the pseudo-propellant bed was increased to 0.73 and 1.06 g•cm-3. This error is attributed to the change in local permeability of the pseudo-propellant bed at high loading densities, which is assumed, for ease of modelling, to be constant in the model. These calculations may enable a better understanding of the physical processes of ignition gas flow in an ignition simulator loaded with a pseudo-propellant bed.
    Źródło:
    Central European Journal of Energetic Materials; 2014, 11, 4; 475-489
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improved HLL Scheme for 1D Dam-Break Flows over Complex Topography
    Autorzy:
    Ying, X.
    Wang, S. S. Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/241462.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
    Tematy:
    dam-break flow
    HLL approximate Riemann solver
    finite volume method
    Saint-Venant equations
    Opis:
    It has been discovered that the shallow water model based on approximate Riemann solvers can produce unrealistic flows in the case of uneven topography and inaccurate solutions of discharge near hydraulic jumps. To overcome these deficiencies, we proposed a new approach to implement the HLL Riemann solver for open channel flows, including: (1) adopting a form of Saint Venant equations which have only one source term representing driving forces; (2) defining discharge at interface and evaluating it according to the flux obtained by the HLL Riemann solver. In this paper, the performance of this new method is evaluated by means of dam-break flows over a channel with triangular cross-section and a natural river valley with complex topography, respectively. Comparisons of computed results with analytic solutions and data measured from the physical model show that the proposed method is capable of satisfactorily reproducing dam-break flows over complex topography.
    Źródło:
    Archives of Hydro-Engineering and Environmental Mechanics; 2010, 57, 1; 31-41
    1231-3726
    Pojawia się w:
    Archives of Hydro-Engineering and Environmental Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Morphology and Ontogenesis of a Marine Ciliate, Euplotes balteatus (Dujardin, 1841) Kahl, 1932 (Ciliophora, Euplotida) and Definition of Euplotes wilberti nov. spec.
    Autorzy:
    Pan, Ying
    Li, Liqiong
    Shao, Chen
    Hu, Xiaozhong
    Ma, Honggang
    Alrasheid, Khaled A. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/763622.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
    Tematy:
    Euplotes balteatus, Euplotes wilberti nov. spec., marine ciliate, morphology, ontogenesis
    Opis:
    Euplotes balteatus (Dujardin, 1841) Kahl 1932, collected from coastal waters near Qingdao, northern China, was investigated using live observation and silver staining methods. An improved diagnosis and morphometric data are provided. Euplotes balteatus can be identified by the following combination of characters: 10 frontoventral cirri, 2 widely separated marginal cirri, 2 fine caudal cirri, 8 dorsal kineties and a double-eurystomus type silverline system. Its morphogenesis, which is similar to that of several congeners, can be summarized as follows: (1) the opisthe’s oral primordium appears de novo under the pellicle whereas the old oral apparatus is retained by the proter; (2) two groups of frontoventral transverse cirral anlagen, each with five streaks, occur de novo and then develop into the frontoventral and transverse cirri separately according to the formula of “3:3:3:3:2” from left to right; (3) the anlagen for the marginal cirri occur de novo near the parental oral apparatus; (4) migratory cirri of both dividers derive from the anlagen near the paroral membrane; (5) the dorsal kinety anlagen come from dedifferentiation of the parental structures in the mid-body region; (6) caudal cirri are formed at the posterior ends of the two rightmost dorsal kineties. In the light of the present findings, it was concluded that the Antarctic population of E. balteatus reported by Song and Wilbert (2002) was misidentified. A new species, Euplotes wilberti nov. spec., is established for this population.
    Źródło:
    Acta Protozoologica; 2012, 51, 1
    1689-0027
    Pojawia się w:
    Acta Protozoologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    iTRAQ-based quantitative proteomics analysis reveals inhibitory mechanismsof the antimicrobial peptide MDAP-2 against Salmonella gallinarum
    Autorzy:
    Zhang, Y.
    Yu, S.
    Ying, X.
    Jia, B.
    Liu, L.
    Liu, J.
    Kong, L.
    Pei, Z.
    Ma, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087299.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Salmonella gallinarum
    AMP
    iTRAQ
    inhibitory mechanism
    Źródło:
    Polish Journal of Veterinary Sciences; 2020, 23, 3; 405-414
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biological characteristics of a new antibacterial peptide and its antibacterial mechanisms against Gram-negative bacteria
    Autorzy:
    Pei, Z.
    Ying, X.
    Tang, Y.
    Liu, L.
    Zhang, H.
    Liu, S.
    Zhang, D.
    Wang, K.
    Kong, L.
    Gao, Y.
    Ma, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087656.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    antimicrobial peptide
    biological characteristics
    antibacterial mechanism
    Gram-negative bacteria
    Źródło:
    Polish Journal of Veterinary Sciences; 2018, 21, 3; 533-542
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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