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Zhihao Liu,Kui Qiu,Yu Dong,Zhaobo Jin,Luwei Liu,Jirong Wu 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.12
A non-aqueous phase (Sb/Fe/NMP) desulfurization system for the removal of hydrogen sulfide from naturalgas was constructed by introducing SbCl3 and FeCl3 in a specific ratio into N-methylpyrrolidone (NMP). The desulfurizingagent and its sulfur product were characterized, and the absorption pattern of H2S by the system wasinvestigated by static desulfurization experiments. The results indicate that the desulfurizer’s sulfur capacity can reach16 g/L at room temperature and pressure, and that adding the optimum amount of water and appropriate temperatureincrease can assist to increase desulfurization efficiency. The system maintained a sulfur capacity level of more than90% of the initial sulfur capacity after five consecutive desulfurization-regeneration cycles. XRD and XPS spectrogramrevealed that the regenerated solid product was high purity sulfur. Sb3+ is a key component to ensure the effectiveabsorption of H2S. The presence of a moderate amount of Fe3+ can oxidize and absorb small amounts of H2S and promotethe oxidative regeneration of the system. In addition, we combined the obtained experimental data with densityflooding theory (DFT) theoretical calculations to show that the effective coordination of Sb(III) with HS in the NMPenvironment is the main reason for the effective absorption of H2S by the desulfurizer. NMP is not involved in thecoordination absorption process of hydrogen sulfide.
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Silencing IL-23 expression by a small hairpin RNA protects against asthma in mice
Yanchun Li,Shucheng Hua,Jirong Lu,Meng Sun,Huanji Cheng,Shanyu Li,Li Liu,Hongmei Qiao 생화학분자생물학회 2011 Experimental and molecular medicine Vol.43 No.4
To determine the impact of IL-23 knockdown by RNA interference on the development and severity of ovalbumin (OVA)-induced asthmatic inflammation, and the potential mechanisms in mice, the IL-23-specific RNAi-expressing pSRZsi-IL-23p19 plasmid was constructed and inhaled into OVA-sensitized mice before each challenge, as compared with that of control mice treated with alum or budesonide. Inhalation of the pSRZsi-IL-23p19, significantly reduced the levels of OVA-challenge induced IL-23 in the lung tissues by nearly 75%, determined by RT-PCR. In addition, knockdown of IL-23 expression dramatically reduced the numbers of eosinophils and neutrophils in BALF and mitigated inflammation in the lungs of asthmatic mice. Furthermore, knockdown of IL-23 expression significantly decreased the levels of serum IgE, IL-23,IL-17, and IL-4, but not IFNγ, and its anti-inflammatory effects were similar to or better than that of treatment with budesonide in asthmatic mice. Our data support the notion that IL-23 and associated Th17 responses contribute to the pathogenic process of bronchial asthma. Knockdown of IL-23 by RNAi effectively inhibits asthmatic inflammation, which is associated with mitigating the production of IL-17 and IL-4 in asthmatic mice.
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Silencing IL-23 expression by a small hairpin RNA protects against asthma in mice
Li, Yanchun,Sun, Meng,Cheng, Huanji,Li, Shanyu,Liu, Li,Qiao, Hongmei,Hua, Shucheng,Lu, Jirong Korean Society for Biochemistry and Molecular Bion 2011 Experimental and molecular medicine Vol.43 No.4
To determine the impact of IL-23 knockdown by RNA interference on the development and severity of ovalbumin (OVA)-induced asthmatic inflammation, and the potential mechanisms in mice, the IL-23-specific RNAi-expressing pSRZsi-IL-23p19 plasmid was constructed and inhaled into OVA-sensitized mice before each challenge, as compared with that of control mice treated with alum or budesonide. Inhalation of the pSRZsi-IL-23p19, significantly reduced the levels of OVA-challenge induced IL-23 in the lung tissues by nearly 75%, determined by RT-PCR. In addition, knockdown of IL-23 expression dramatically reduced the numbers of eosinophils and neutrophils in BALF and mitigated inflammation in the lungs of asthmatic mice. Furthermore, knockdown of IL-23 expression significantly decreased the levels of serum IgE, IL-23, IL-17, and IL-4, but not IFN${\gamma}$, and its anti-inflammatory effects were similar to or better than that of treatment with budesonide in asthmatic mice. Our data support the notion that IL-23 and associated Th17 responses contribute to the pathogenic process of bronchial asthma. Knockdown of IL-23 by RNAi effectively inhibits asthmatic inflammation, which is associated with mitigating the production of IL-17 and IL-4 in asthmatic mice.
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Enhanced Strength–Corrosion Synergy of 6061Al Casting Alloy Through Erbium Addition
Guilan Xie,Puli Cao,Daibo Zhu,Jingxin Li,Chaohua Jiang,Juan Li,Yang Liu,Jirong Liu,Yulong Zhu 대한금속·재료학회 2023 METALS AND MATERIALS International Vol.29 No.12
The purpose of this work is to investigate the effect of Er on mechanical properties and corrosion behavior of 6061 alloys. Thetensile strength and corrosion resistance of the 6061 alloys first enhanced and then declined synergistically with the increaseof Er content. Microstructure analysis revealed that the morphology, composition, and potential of secondary phases changedsignificantly as Er content changed. When the Er content is 0.6 wt%, the needle-like β-AlFeSi phases transformed into thegranular AlFeSiEr phases, which led to an increase in the tensile strength of the 6061 alloys. At the same time, compared withthe acicular β-AlFeSi phases, the granular AlFeSiEr phases own a lower potential difference with α-Al, which weakened thecorrosion of the micro-galvanic couples. However, as the Er content is higher than 0.6 wt%, the granular AlFeSiEr phaseschanged to block-shaped, which can adversely affect the tensile strength and corrosion resistance of the 6061 alloys. EISresults show that, compared with the acicular β-AlFeSi phases, the 6061 alloys with granular AlFeSiEr phases form moreuniform oxide films and exhibit better corrosion resistance. This study indicates that through appropriate Er addition, thesynergistic enhancement of tensile strength and corrosion resistance of the 6061 alloys can be obtained, which is of greatsignificance for the strengthening and long-term service of aluminum alloys.
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