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    Wyświetlanie 1-6 z 6
    Tytuł:
    Investigation on co-pyrolysis of sewage sludge with coal
    Autorzy:
    Tan, Z.-X.
    Ai, P.
    Li, Y.-M.
    Ji, X.-Y.
    Feng, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/207582.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    coal
    carbon dioxide
    sewage sludge
    co-pyrolysis
    FTIR analysis
    coal sludge
    thermal reactions
    węgiel
    dwutlenek węgla
    osady ściekowe
    FTIR
    szlam węglowy
    reakcje termiczne
    kopiroliza
    piroliza osadów ściekowych
    Opis:
    Co-pyrolysis characteristics of sludge with coal and sludge briquetted with coal were studied by the TG-FTIR method. From TG data, weight loss of sludge briquetted was higher than that of sludge and sludge and coal which means that thermal reaction effect of sludge briquetted is better than those of other two materials. Gas products of pyrolysis were CO, CO2, H2O, alcohol, ketone, acid, hydrocarbon, amine and azine from the FTIR analysis. At last, evolving patterns of the pyrolyses and the yields of their gas products have been recorded, providing extremely important data on the mechanism of the process.
    Źródło:
    Environment Protection Engineering; 2014, 40, 1; 117-126
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermodynamic and Electronic Properties of $OsB_2$ from First-Principles Calculations
    Autorzy:
    Cheng, Y.
    Yang, J.
    Wang, Y.
    Ji, G.
    Chen, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/1365243.pdf
    Data publikacji:
    2014-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.15.Mb
    61.50.Ks
    67.25.de
    71.20.-b
    Opis:
    The pressure induced phase transitions of $OsB_2$ from the orthorhombic structure (Orth) to the hexagonal structure (Hex) is investigated by using ab initio plane-wave pseudopotential density functional theory, together with quasi-harmonic Debye model. We find that the pressure-induced phase transition occurs at 2.8 GPa and 12.5 GPa by local density approximation and general gradient approximation, respectively. It is predicted that $OsB_2$ has no phase transition temperature from the Orth structure to the Hex structure. Moreover, the dependences of the relative volume V/$V_0$ on the pressure, thermal expansion coefficient α on the pressure and temperature are also successfully obtained. The electronic properties including energy band, total and partial density of states and electron density difference for two structures are also analyzed. The Mulliken charges and Bond populations for both Orth and Hex structures are also obtained.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 5; 1186-1190
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new troodontid theropod from the Late Cretaceous of central China, and the radiation of Asian troodontids
    Autorzy:
    Lu, J
    Xu, L.
    Liu, Y.
    Zhang, X.
    Jia, S.
    Ji, Q.
    Powiązania:
    https://bibliotekanauki.pl/articles/20912.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    new theropod
    Late Cretaceous
    Central China
    Asian troodontid
    troodontid
    Theropoda
    Troodontidae
    Xixiasaurus
    Cretaceous
    Henan province
    China
    paleontology
    Opis:
    A new troodontid dinosaur, Xixiasaurus henanensis gen. et sp. nov., from the Upper Cretaceous Majiacun Formation of the Xixia Basin, Henan Province, is erected, based on a partial skull. It is characterized by bearing 22 maxillary teeth, a distinct opening on the lateral surface of the base of nasal process of the premaxilla, the rostral end of the upper jaw forming a tapered U−shape, and the mandibular symphyseal region slightly inflected medially. Xixiasaurus is most closely related to the Mongolian Byronosaurus among troodontids. Byronosaurus, Urbacodon, and Xixiasaurus may form a new clade, suggesting an endemic radiation of troodontids across Asia, including multiple taxa without dental serrations. The discovery of Xixiasaurus in the Xixia Basin may imply that the Xixiasaurus−bearing Majiacun Formation is Campanian in age.
    Źródło:
    Acta Palaeontologica Polonica; 2010, 55, 3; 381-388
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Horizontal transfer and functional evaluation of high pathogenicity islands in Avian Escherichia coli
    Autorzy:
    Tu, J.
    Qi, K.
    Song, X.
    Xue, T.
    Ji, H.
    Shao, Y.
    Liu, H.
    Zhou, X.
    Zhu, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/30119.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    High pathogenicity islands (HPIs) in Escherichia coli encode genes that are primarily involved in iron uptake and regulation, and confer virulence and pathogenicity. The aim of this study was to investigate the transfer of HPIs in avian E. coli and identify the function of HPI in the acceptor strain. The HPI transfer strain was obtained under conditions of low temperature and low iron abundance, and the donor and acceptor strains were confirmed. E. coli HPIs are transferred by horizontal gene transfer events, which are likely mediated primarily by homologous recombination in HPI-adjacent sequences. Assays for biological activity and pathogenicity changes in the acceptor strain indicated that HPIs might not be involved in pathogenesis in avian E. coli, and thus the main function of HPIs in this strain of bacteria may be to regulate iron nutrition.
    Źródło:
    Polish Journal of Veterinary Sciences; 2017, 20, 2
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Bending, Impact Fracture Behavior and Characteristics of Stainless Steel Clad Plates with Different Rolling Temperature
    Autorzy:
    An, Q.
    Fan, K. Y.
    Ge, Y. F.
    Liu, B. X.
    He, J.
    Wang, S.
    Chen, C. X.
    Ji, P. G.
    Tolochko, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/2049433.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    stainless steel clad plate
    interface characteristics
    bending behavior
    impact morphologies
    delamination crack
    Opis:
    The interface characteristics, bending and impact behavior, as well as fracture characteristics of stainless steel clad plates fabricated by vacuum hot rolling at different rolling temperatures of 1100°C, 1200°C and 1300°C are investigated in detail. The interface bonding strength is gradually increased with the increasing rolling temperature due to the sufficient diffusion behavior of alloy element. The bending toughness and impact toughness are gradually decreased, while the bending strength increase with the increase of the rolling temperature, which is attributed to mechanisms of matrix softening and interface strengthening at high rolling temperature. Due to the weak interface at 1100°C, the bending and impact crack propagation path was displaced by delamination cracks, which in turn lead to reduction in stress intensity of the main crack, playing an effective role in toughening the stainless steel clad plates. Moreover, the impact fracture morphologies of clad plates show a typical ductile-brittle transition phenomenon, which is attributed to the matrix softening behavior with the increasing rolling temperature.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 1; 229-239
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Coated Ammonium Dinitramide on the Properties of Nitrate-ester Plasticized Polyether Solid Rocket Propellants
    Autorzy:
    Pang, W. Q.
    Li, J. Q.
    DeLuca, L. T.
    Ke, W.
    Fu, X. L.
    Zhong, F. X.
    Li, H.
    Ji, Y. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/358292.pdf
    Data publikacji:
    2018
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    energetic materials
    NEPE composite solid propellants
    ADN
    hazardous properties
    combustion characteristics
    Opis:
    Several industrial and research types of nitrate-ester plasticized polyether (NEPE) solid propellants were experimentally analyzed. In general, their compositions differed in the mass fraction of ammonium dinitramide (ADN), which was used as a promising highly energetic filler, as an alternative to ammonium perchlorate (AP). ADN exhibits high performance, low signature and non-polluting characteristics. The propellant composition without ADN, but with AP, was used as the reference. The microstructure and granularity distribution of the uncoated and coated ADN particles were experimentally analyzed. It was found that uncoated ADN particles exhibited irregular shape, while the ADN particles after coating are spherical. Because of their irregular shape, uncoated ADN particles caused inferior processability of the propellant slurry when added to the propellant formulation. Consequently, the NEPE propellants with coated ADN were studied in further detail. The rheological properties, energetic properties, mechanical sensitivities and combustion properties (burning rate and pressure exponent) of the NEPE propellants with coated ADN were studied and compared with the reference NEPE propellant. The addition of ADN particles to the propellant formulations increased the standard theoretical specific impulse and heat of explosion of the propellants, while decreasing the density. The propellants containing ADN particles were much more sensitive to impact and friction compared to the reference sample. Moreover, increasing the ADN mass fraction in the propellant formulation can significantly affect the combustion behaviour and increase the burning rate and pressure exponent compared to of the reference formulation. However it appears that ADN is a very promising candidate as a new energetic material in compositions of NEPE propellants, although several important questions concerning ADN’s suitability, especially in the context of its sensitivity to friction and impact, remain to be answered.
    Źródło:
    Central European Journal of Energetic Materials; 2018, 15, 4; 590-609
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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