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1
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Analytic Equation of State and Thermodynamic Properties, for α-, β-, and γ-Si₃N₄ Based on Analytic Mean Field Approach

100%
Wang L., Sun J., Yang W., Tian R.
Acta Physica Polonica A
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2008
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vol. 114
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issue 4
807-818
EN
The analytic mean field potential approach is applied to α-, β-, and γ-Si₃N₄. The analytic expressions for the Helmholtz free energy, internal energy, and equation of state were derived. The formalism for the case of the Morse potential is used in this work. Its six potential parameters are determined through fitting the compression experimental data of α-, β-, and γ-Si₃N₄. The calculated compression curves of α-, β-, and γ-Si₃N₄ are in good agreement with the available experimental data. This suggests that the analytic mean field potential approach is a very useful approach to study the thermodynamic properties of Si₃N₄. Furthermore, we predict the variation of the free energy and internal energy with the molar volume at several higher temperatures and calculate the temperature dependence of the molar volume, bulk modulus, thermal expansion coefficient and isochoric heat capacity at zero pressure.
2
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Efficacy evaluation of two live virus vaccines against an emerging pseudorabies virus variant

100%
Wang M., Wang L., Zhao Q.
Polish Journal of Veterinary Sciences
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2019
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issue 4
3
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PHASE TRANSITION AND PLASTICITY ENHANCEMENT OF Ti-Cu-BASED BULK METALLIC GLASSES

100%
Wang L., Zhang G., Sun X., Wang X.
Archives of Metallurgy and Materials
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2018
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vol. 63
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issue 1
4
Content available remote

The Antibacterial Activities of Ag/Nano-TiO_2 Modified Silicone Elastomer

100%
Wang L., Sun T., Zhou S., Shao L.
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vol. 125
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issue 2
248-250
EN
We studied the ability of Ag/nano-TiO_2 to inhibit Staphylococcus aureus growth on silicone elastomer material. Ag/nano-TiO_2 silicone elastomer was prepared with different concentrations of 0%, 2%, 4%, 6%, 8%, 10%. The antibacterial efficacy of Ag/nano-TiO_2 silicone elastomer was determined by the inhibition zone method and the impregnated culture method. The antibacterial timeliness of Ag/nano-TiO_2 silicone elastomer was tested by direct contact method. The samples were kept through thermal aging process in an accelerated aging chamber. The effect of concentrations of Ag/nano-TiO_2 was insignificant (P < 0.05). There was significant difference between the Ag/nano-TiO_2 silicone elastomer and the blank silicone elastomer (P < 0.5). There was also significant difference among specimen groups whose aging periods were 50°C, 100°C, 150°C, 200°C for 87 h (P < 0.5). The silicone elastomer with different concentrations of Ag/nano-TiO_2 effectively inhibits Staphylococcus aureus growth.
5
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The Influence of Different Resin Cements and Pretreatments on the Bond Strength between Zirconia and Cement

100%
Sun T., Hu C., Wang L., Shao L.
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vol. 125
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issue 2
313-315
EN
The aim of this study was to analyze the influence of various luting materials and surface treatments on adhesive strength for zirconia ceramics and luting cements. The zirconia framework specimens were made into cylinders. Prior to cement, zirconia framework specimens underwent various surface treatments (sandblasting with 110 μm Al_2O_3 particles, milling with 240-grift silicon sand paper and silanization). Resin luting cement and glass ionomer luting cement were then applied on the surface of zirconia specimens. The specimens were then subjected to a shear force. The fractured surfaces were visually analyzed by scanning electron microscopy. The shear bond strength values of resin luting cement bonded to zirconia specimens were significantly higher than glass ionomer luting cement bonded to zirconia specimens (P < 0.05). The shear bond strength values of zirconia specimens sandblasted with 110 μm Al_2O_3 particles were significantly higher than those milled with silicon carbide papers and underwent silanization (P < 0.05). The shear bond strength values of zirconia specimens milled with silicon carbide papers and underwent silanization were not significantly different (P < 0.05). The highest shear bond strength values were achieved when the zirconia specimens were sandblasted and bonded to resin luting cement. Airborne-particle abrasion was an effective method which could enhance the bond strength of zirconia ceramics and cements. The resin luting cement exhibited a higher bond to zirconia than glass ionomer luting cement.
6

Use of inter-simple sequence repeat markers to develop strain-specific SCAR markers for Flammulina velutipes

88%
Su H., Wang L., Liu L., Chi X., Zhang X.
Journal of Applied Genetics
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2008
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vol. 49
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issue 3
233-235
EN
In this paper, we report for the first time on authentication of Flammulina velutipes cultivars by using strain-specific sequence-characterized amplified region (SCAR) markers developed from inter-simple sequence repeat (ISSR) markers. The genomic DNA polymorphism was analyzed by the ISSR technique in 7 strains of F. velutipes presently cultivated in China on a commercial scale. Eight primers selected from 20 ISSR primers amplified 104 clear and stable bands, of which 81 bands were polymorphic. Among the selected primers, primer ISSR9 can distinguish strain No. 12 from the other 6 strains by amplifying a unique and reproducible band of approximately 750 bp. According to the sequence of the strain-specific fragment, a pair of SCAR primers was designed to diagnose strain No. 12 on the molecular level. The validity of the SCAR marker was confirmed by using DNA samples from another 12 strains of F. velutipes obtained from different parts of China. Our data provided the foundation for a precise and rapid PCR-based strain-diagnostic system for F. Velutipes.
7
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Explanation of the Optical Spectra and Spin-Hamiltonian Parameters for Nickel(II) in Cadmium Bromide Crystal

88%
Gong J., Wang L., Feng W., Yang X., Zhang F.
Acta Physica Polonica A
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2011
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vol. 120
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issue 3
497-500
EN
Based on crystal- and ligand-field theory, double-spin-orbital coupling approach was used to analyze the crystal-field energy levels and spin-Hamiltonian parameters of Ni^{2+} ion at trigonal site in CdBr_2. The local lattice distortion (Δ R and τ_{Ni^{2+}}) is estimated from the crystal field parameters; the crystal field energy Hamiltonian was diagonalized in the full basis consisting of 45 wave functions of the Ni^{2+} ion. Results of calculations are in good agreement with experimental data. The reasonableness of the theoretical results is discussed.
8
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Crystallization Process of Fe_{75}Co_5Zr_{10}B_{10} Amorphous Alloy

76%
Sun Y., Zuo B., Wang D., Meng X., Liu J., Wang L., Hua Z.
Acta Physica Polonica A
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2013
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vol. 124
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issue 4
685-687
EN
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.
9
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Expression and immunological evaluation of elongation factor Tu of Streptococcus suis serotype 2

76%
Xia X. J., Wang L., Cheng L. K., Shen Z. Q., Li S. G., Wang J. L.
Polish Journal of Veterinary Sciences
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2017
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issue 2
10
Content available remote

Improving Triggering Characteristics for a Surface-Flashover Triggered Vacuum Switch

76%
He Z., Wang L., Li F., Yao W., Dong M., Zhao C.
Acta Physica Polonica A
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2009
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vol. 115
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issue 6
1019-1021
EN
A surface-breakdown triggered vacuum switch with parallel disk electrodes and semiconductor surface flashover trigger electrode has many advantages, it is easy to be triggered and machined. The resistance of the trigger gap has been increased in terms of modifying the thickness of the semiconductor layer and improving coating process technology. The trigger gap resistance, trigger voltage and trigger waveforms were experimentally tested. The results show that the triggering characteristics can be improved by increasing the trigger resistance.
11
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The Effect of Nb Content on the Thermal, Structural, and Magnetic Properties of FeNbB Ribbons

64%
Hua Z., Zuo B., Li M., Wang X., Wang L., Liu J., Wang D., Dong L.
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vol. 125
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issue 5
1149-1151
EN
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.
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