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    Wyświetlanie 1-9 z 9
    Tytuł:
    Numerical simulation on mining effects of upper coal seam on lower coal seam of splitting area of splitting and merging coal seam
    Symulacja numeryczna efektów wydobywania węgla w górnym pokładzie węgla na dolny pokład węgla na obszarze rozszczepienia w pokładzie o cechach rozszczepienia i scalania
    Autorzy:
    Zha, W. H.
    Hua, X. Z.
    Xiong, L. J.
    Huang, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/348696.pdf
    Data publikacji:
    2012
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    rozszczepienie i scalanie
    naprężenia stropu
    prawo pęknięć
    symulacja numeryczna
    splitting and merging
    floor stress
    failure law
    numerical simulations
    Opis:
    The main mining coal seams 71 and 72 of Huaibei mine area show a relation between splitting and merging. Under the slicing mining circumstance of the splitting area, it is the key problem to face the mining area to ensure the safety of the lower 72 coal mining. Based on face 7225 of Xutuan Coal Mine the influence of 71 coal seam mining on the coal seam 72 was analyzed by the FLAC3D. The law of stress propagation in the floor, failure extent and movement during the mining of coal seam 71 and coal seam 72 were studied by the numerical simulation; it provides the basis for roof management and support selection of 72 coal seam mining.
    Główne pokłady węglowe nr 71 i 72 kopalni Huaibei wykazują cechy zarówno rozszczepienia, jak i scalania. Podczas wybierania warstwowego na obszarze rozszczepienia głównym problemem jest zapewnienie bezpieczeństwa dolnego pokładu nr 72. Na przykładzie przodka 7225 kopalni Xutuan przeanalizowano wpływ wydobycia w pokładzie nr 71 na pokład nr 72 przy użyciu programu FLAC3D. Propagację fal naprężeń w spągu, zakres pęknięcia i przesunięcia podczas wybierania pokładu węgla nr 71 i 72 zbadano za pomocą symulacji numerycznej, co daje podstawy do lepszej kontroli stropu i do wyboru obudowy pod wybieranie pokładu węgla nr 72.
    Źródło:
    AGH Journal of Mining and Geoengineering; 2012, 36, 3; 471-479
    1732-6702
    Pojawia się w:
    AGH Journal of Mining and Geoengineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    CO2 concentration affects in vitro pig embryo developmental capacity
    Autorzy:
    Zhang, L.
    Lin, Z.
    Bi, Y.
    Zheng, X.
    Xiao, H.
    Hua, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087657.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    CO2
    developmental capacity
    pig embryos
    in vitro
    Źródło:
    Polish Journal of Veterinary Sciences; 2018, 21, 3; 609-614
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new adaptation for in vitro co-culture of single porcine parthenogenetic embryos using feeder cells
    Autorzy:
    Zhang, L.
    Lin, Z.
    Hua, Z.
    Zheng, X.
    Xiao, H.
    Hua, W.
    Ren, H.
    Zhu, Z.
    Molenaar, A.
    Bi, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087368.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    feeder cells
    porcine
    embryos
    in vitro
    Źródło:
    Polish Journal of Veterinary Sciences; 2019, 4; 711-716
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impact of different sources of donor cells upon the nuclear transfer efficiency in Chinese indigenous Meishan pig
    Autorzy:
    Hua, Z.
    Xu, G.
    Liu, X.
    Bi, Y.
    Xiao, H.
    Hua, W.
    Li, L.
    Zhang, L.
    Ren, H.
    Zheng, X.
    Powiązania:
    https://bibliotekanauki.pl/articles/31224.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    Somatic cell nuclear transfer (SCNT) is currently the most efficient and precise method to generate genetically tailored pig models for both agricultural and biomedical research. However, its efficiency is crucially dependent on the source of nuclear donor cells. In this study, we compared the cloning efficiency by using three lines of donor cells that are derived from fetal, newborn and adult fibroblasts of Chinese indigenous Meishan pig. We showed that cleavage rate and blastocyst formation rate of the reconstructed embryos were not significantly different between the fetal (80.7% and 15.6%) and newborn ear skin (77.5% and 12.3%) fibroblast groups (p>0.05), but in both groups these indices were significantly higher than that found in the adult ear skin (70.5% and 8.8%; p<0.05). Reconstructed embryos derived from fetal, newborn, and adult ear skin fibroblasts were transferred to four surrogates, respectively. For the fetal, newborn, and adult ear skin fibroblasts, the number of pregnancies were two (50.0%), two (50.0%), and one (25.0%), respectively, and the number of deliveries were two (50.0%), one (25.0%), and zero (0.0%), respectively. Seven and two cloned piglets were obtained from the fetal and newborn ear skin fibroblasts respectively, while no piglets were obtained from the adult ear skin fibroblasts. Two cloned piglets from the newborn ear skin fibroblasts died shortly after birth because of neonatal asphyxia caused by dystocia. The birth weights of the piglets derived from the fetal and newborn ear skin fibroblasts were 1230.5 and 1310.0g, respectively, which were statistically insignificant (p>0.05), but both were significantly higher than that of the control groups (p<0.05). Microsatellite analyses demonstrated that the genotypes of all cloned piglets were identical to their donor cells. Therefore, cloned pigs were successfully produced using two sources of donor cells isolated from the fetal and newborn ear skin fibroblasts of Meishan piglet, and indicating a better cloning efficiency than that obtained from adult fibroblasts. We concluded that the nuclear donor cell lines have significant impact on the developmental competence of cloned embryos as well as on the cloning efficiency of Meishan pig.
    Źródło:
    Polish Journal of Veterinary Sciences; 2016, 19, 1
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Annealing Temperature and Ambient on Formation, Composition and Bandgap of $Cu_2ZnSnS_4$ Thin Films
    Autorzy:
    Sun, Y.
    Yao, B.
    Meng, X.
    Wang, D.
    Long, D.
    Hua, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/1205220.pdf
    Data publikacji:
    2014-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    68.55.-a
    Opis:
    Amorphous Cu-Zn-Sn-S precursor films were prepared by sol-gel and spin-coating with copper chloride, zinc chloride, tin chloride and thiourea solutions as starting materials. A $Cu_2ZnSnS_4$ film with kesterite structure and a small amount of chlorine formed when the precursor was annealed under Ar ambient at temperature above 200°C, but its atomic ratios of Cu:Zn:Sn:S far deviated from stoichiometric ratios of the $Cu_2ZnSnS_4$. However, when the precursor films were annealed with sulfur powder together at temperatures between 360 and 480°C, the CZTS film containing a very small amount of Cl formed, and its atomic ratio change little for Cu, Zn, and Sn, increases for S and decreases for Cl with increasing temperature. When the temperature is 480°C, a CZTS only has Cu, Zn, Sn, and S element is fabricated, and the atomic ratio of Cu:Zn:Sn:S is near the stoichiometric ratio. The bandgap of the CZTS decreases with increasing annealing temperature. The mechanisms of the formation and the properties of the CZTS are suggested in the present work.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 3; 751-756
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Influence of Cycle Sputtering Deposition on the Properties of Cu₂ZnSnS₄ Thin Films
    Autorzy:
    Sun, Y.
    Yao, B.
    Long, D.
    Meng, X.
    Liu, L.
    Hua, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/1398930.pdf
    Data publikacji:
    2016-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.40.Fy
    Opis:
    Three kinds of precursor thin films with stacking orders of Cu/Sn/ZnS, Cu/Sn/ZnS/Cu/Sn/ZnS and Cu/Sn/ZnS/Cu/Sn/ZnS/Cu/Sn/ZnS were prepared by magnetron sputtering and annealed with sulfur powder. The microstructure, morphology and optical properties of thin films were investigated by X-ray diffraction, the Raman scattering, scanning electron microscopy and UV-visible spectrophotometer. The increase of cycle number decreases the sulfurizing temperature of the formation of Cu₂ZnSnS₄ phase. Chemical composition can be controlled by cycle sputtering deposition. After sulfurizing at 500°C, the particle size and the band gap increase with increasing cycle number.
    Źródło:
    Acta Physica Polonica A; 2016, 129, 6; 1169-1172
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Crystallization Process of $Fe_{75}Co_5Zr_{10}B_{10}$ Amorphous Alloy
    Autorzy:
    Sun, Y.
    Zuo, B.
    Wang, D.
    Meng, X.
    Liu, J.
    Wang, L.
    Hua, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399278.pdf
    Data publikacji:
    2013-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.43.Dq
    64.60.My
    Opis:
    $Fe_{75}Co_5Zr_{10}B_{10}$ amorphous alloy prepared by melt-spinning was annealed at various temperatures. The thermal property and microstructures were investigated by differential thermal analysis, X-ray diffraction, and transmission electron microscopy. The crystallization process of $Fe_{75}Co_5Zr_{10}B_{10}$ amorphous alloy is complex. The α-Fe phase precipitates from the amorphous matrix in the initial stage of crystallization. The α-Mn type (χ) phase precipitates at 570°C, but transforms to α-Fe phase and the Laves C14(λ) phase at higher temperature. In the final stage of crystallization, $Fe_3Zr$, $Fe_2Zr$, and unknown phases are observed and the λ-phase disappears. The α-Fe phase preferentially nucleates after annealing at 530C for 10 min and the χ-phase preferentially nucleates after annealing at 600C for 10 min. The nucleation barrier of χ-phase is larger than that of α-Fe phase. The local structure of χ-phase is more similar to amorphous phase.
    Źródło:
    Acta Physica Polonica A; 2013, 124, 4; 685-687
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect of Nb Content on the Thermal, Structural, and Magnetic Properties of FeNbB Ribbons
    Autorzy:
    Hua, Z.
    Zuo, B.
    Li, M.
    Wang, X.
    Wang, L.
    Liu, J.
    Wang, D.
    Dong, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1365063.pdf
    Data publikacji:
    2014-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    65.60.+a
    61.43.Dq
    Opis:
    Amorphous $Fe_{80-x}Nb_{x}B_{20}$ (x = 5, 10, 15) ribbons were prepared by single-roller melt spinning method. The thermal, structural and magnetic properties of $Fe_{80-x}Nb_{x}B_{20}$ (x = 5, 10, 15) ribbons were investigated using differential thermal analysis, X-ray diffraction, and vibrating sample magnetometer. The thermal stability is the lowest for $Fe_{70}Nb_{10}B_{20}$ ribbon and the highest for $Fe_{65}Nb_{15}B_{20}$ ribbon. Along with the increase of Nb content, the supercooled liquid region Δ $T_{x}$ increases, indicating that the amorphous formation ability improves. The primary stages of crystallization of the three ribbons are different. The primary devitrification phases are $Fe_{23}B_6$ type for $Fe_{70}Nb_{10}B_{20}$ and $Fe_{75}Nb_5B_{20}$ ribbons, and α-Fe type for $Fe_{65}Nb_{15}B_{20}$ ribbon. $Fe_{80-x}Nb_{x}B_{20}$ (x = 5, 10) ribbons are ferromagnetic and the $Fe_{65}Nb_{15}B_{20}$ ribbon is paramagnetic. The saturation magnetization ($M_{s}$) decreases with increasing Nb content.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 5; 1149-1151
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimal expression and purification of sapelovirus A structural protein VP1, and its immunogenicity in mice
    Autorzy:
    Zhao, T.T.
    Cui, L.
    Chen, L.
    Li, J.J.
    Liang, Q.L.
    Wu, P.J.
    Yu, X.Q.
    Zhang, Z.H.
    Hua, X.G.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087686.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    sapelovirus A
    prokaryotic expression
    purification
    Źródło:
    Polish Journal of Veterinary Sciences; 2018, 21, 3; 573-579
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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