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Low-cycle Fatigue Performances of P/M Ti-Fe-Mo-Al-Nd Alloy
Haiyan Liu,Huiping Tang,Cheng Li,Yuanping Huang,Boyun Huang,Yong Liu 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
The low-cycle fatigue performance and fracture of the P/M Ti-Fe-Mo-Al-Nd Alloys after sintering and forging have been studied. The linear regression equation of low-cycle fatigue lifetime has been obtained; the fatigue performances are objected under two different conditions. The fatigue fracture surface is analyzed by SEM. The low-cycle fatigue behavior of the P/M titanium alloy has been discussed.
( Haiyan Zhu ),( Zhiwu Chen ),( Zengchun Ma ),( Hongling Tan ),( Chengrong Xiao ),( Xianglin Tang ),( Boli Zhang ),( Yuguang Wang ),( Yue Gao ) 한국응용약물학회 2017 Biomolecules & Therapeutics(구 응용약물학회지) Vol.25 No.6
Tanshinone IIA (Tan IIA) is a pharmacologically active substance extracted from the rhizome of Salvia miltiorrhiza Bunge (also known as the Chinese herb Danshen), and is widely used to treat atherosclerosis. The pregnane X receptor (PXR) is a nuclear receptor that is a key regulator of xenobiotic and endobiotic detoxification. Tan IIA is an efficacious PXR agonist that has a potential protective effect on endothelial injuries induced by xenobiotics and endobiotics via PXR activation. Previously numerous studies have demonstrated the possible effects of Tan IIA on human umbilical vein endothelial cells, but the further mechanism for its exerts the protective effect is not well established. To study the protective effects of Tan IIA against hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) in human umbilical vein endothelial cells (HUVECs), we pretreated cells with or without different concentrations of Tan IIA for 24 h, then exposed the cells to 400 μM H<sub>2</sub>O<sub>2</sub> for another 3 h. Therefore, our data strongly suggests that Tan IIA may lead to increased regeneration of glutathione (GSH) from the glutathione disulfide (GSSG) produced during the GSH peroxidase-catalyzed decomposition of H<sub>2</sub>O<sub>2</sub> in HUVECs, and the PXR plays a significant role in this process. Tan IIA may also exert protective effects against H<sub>2</sub>O<sub>2</sub>-induced apoptosis through the mitochondrial apoptosis pathway associated with the participation of PXR. Tan IIA protected HUVECs from inflammatory mediators triggered by H<sub>2</sub>O<sub>2</sub> via PXR activation. In conclusion, Tan IIA protected HUVECs against H<sub>2</sub>O<sub>2</sub>-induced cell injury through PXR-dependent mechanisms.
Tanshinone IIA Protects Endothelial Cells from H2O2-Induced Injuries via PXR Activation
Haiyan Zhu,Zhiwu Chen,Zengchun Ma,Hongling Tan,Chengrong Xiao,Xianglin Tang,Boli Zhang,Yuguang Wang,Yue Gao 한국응용약물학회 2017 Biomolecules & Therapeutics(구 응용약물학회지) Vol.25 No.6
Tanshinone IIA (Tan IIA) is a pharmacologically active substance extracted from the rhizome of Salvia miltiorrhiza Bunge (also known as the Chinese herb Danshen), and is widely used to treat atherosclerosis. The pregnane X receptor (PXR) is a nuclear receptor that is a key regulator of xenobiotic and endobiotic detoxification. Tan IIA is an efficacious PXR agonist that has a potential protective effect on endothelial injuries induced by xenobiotics and endobiotics via PXR activation. Previously numerous studies have demonstrated the possible effects of Tan IIA on human umbilical vein endothelial cells, but the further mechanism for its exerts the protective effect is not well established. To study the protective effects of Tan IIA against hydrogen peroxide (H2O2) in human umbilical vein endothelial cells (HUVECs), we pretreated cells with or without different concentrations of Tan IIA for 24 h, then exposed the cells to 400 μM H2O2 for another 3 h. Therefore, our data strongly suggests that Tan IIA may lead to increased regeneration of glutathione (GSH) from the glutathione disulfide (GSSG) produced during the GSH peroxidase-catalyzed decomposition of H2O2 in HUVECs, and the PXR plays a significant role in this process. Tan IIA may also exert protective effects against H2O2-induced apoptosis through the mitochondrial apoptosis pathway associated with the participation of PXR. Tan IIA protected HUVECs from inflammatory mediators triggered by H2O2 via PXR activation. In conclusion, Tan IIA protected HUVECs against H2O2-induced cell injury through PXR-dependent mechanisms.
Jun Tang,Qingquan Liu,Haiyan Yuan,Yongxia Zhang,Weilin Wang,Suzhen Huang 한국유전학회 2018 Genes & Genomics Vol.40 No.8
Iris lactea var. chinensis is a perennial herbaceous halophyte with high salt tolerance and ornamental value. Previous RNA sequencing analysis revealed a transcription factor gene IlWRKY2 expression was upregulated by salt stress. To obtain the full-length sequence, the basic characteristics of IlWRKY2 and its expression pattern under salt stress. Full-length cDNA of IlWRKY2 was cloned by 3′/5′ RACE based on the intermediate sequence obtained by RNA sequencing analysis. Structure analysis of IlWRKY2 were performed by Compute pI/MW tool, PSIPRED and SWISS-MODEL analysis. Sequence analysis of IlWRKY2 were performed by BLAST program, DNAman software, MEGA software and MEME program. IlWRKY2 expression pattern was analyzed by quantitative real-time polymerase chain reaction. The open reading frame of IlWRKY2 is 1338 bp in length, which encodes a protein of 446 amino acids. Amino acid sequence analysis revealed that the IlWRKY2 contains one WRKY domains with a zinc finger motif C–X5–C–X23–H–X–H. Phylogenetic analysis showed that the IlWRKY2 was much closer to EgWRKY41 from Elaeis guineensis and MaWRKY42 from Musa acuminata subsp. malaccensis. Furthermore, the expression of IlWRKY2 in I. lactea var. chinensis shoots was upregulated by different concentrations of NaCl treatment and increased 16-fold after treatment with 200 mM NaCl for 12 h. Obtained the full-length cDNA of IlWRKY2 which belongs to Group II-b WRKY subfamily. IlWRKY2 expression was obviously induced by salt stress in I. lactea var. chinensis shoots and it may play an important role in halophyte I. lactea var. chinensis adaptation to environmental salt stress.
Zhu, Haiyan,Chen, Zhiwu,Ma, Zengchun,Tan, Hongling,Xiao, Chengrong,Tang, Xianglin,Zhang, Boli,Wang, Yuguang,Gao, Yue The Korean Society of Applied Pharmacology 2017 Biomolecules & Therapeutics(구 응용약물학회지) Vol.25 No.6
Tanshinone IIA (Tan IIA) is a pharmacologically active substance extracted from the rhizome of Salvia miltiorrhiza Bunge (also known as the Chinese herb Danshen), and is widely used to treat atherosclerosis. The pregnane X receptor (PXR) is a nuclear receptor that is a key regulator of xenobiotic and endobiotic detoxification. Tan IIA is an efficacious PXR agonist that has a potential protective effect on endothelial injuries induced by xenobiotics and endobiotics via PXR activation. Previously numerous studies have demonstrated the possible effects of Tan IIA on human umbilical vein endothelial cells, but the further mechanism for its exerts the protective effect is not well established. To study the protective effects of Tan IIA against hydrogen peroxide ($H_2O_2$) in human umbilical vein endothelial cells (HUVECs), we pretreated cells with or without different concentrations of Tan IIA for 24 h, then exposed the cells to $400{\mu}M$ $H_2O_2$ for another 3 h. Therefore, our data strongly suggests that Tan IIA may lead to increased regeneration of glutathione (GSH) from the glutathione disulfide (GSSG) produced during the GSH peroxidase-catalyzed decomposition of $H_2O_2$ in HUVECs, and the PXR plays a significant role in this process. Tan IIA may also exert protective effects against $H_2O_2$-induced apoptosis through the mitochondrial apoptosis pathway associated with the participation of PXR. Tan IIA protected HUVECs from inflammatory mediators triggered by $H_2O_2$ via PXR activation. In conclusion, Tan IIA protected HUVECs against $H_2O_2$-induced cell injury through PXR-dependent mechanisms.
Structure and Electrical Performance of Na<sub>2</sub>C<sub>6</sub>O<sub>6</sub> under High Pressure
Wang, Xuan,Zhang, Peijie,Tang, Xingyu,Guan, Junjie,Lin, Xiaohuan,Wang, Yajie,Dong, Xiao,Yue, Binbin,Yan, Jinyuan,Li, Kuo,Zheng, Haiyan,Mao, Ho-kwang American Chemical Society 2019 The Journal of Physical Chemistry Part C Vol. No.
<P>Sodium rhodizonate (Na<SUB>2</SUB>C<SUB>6</SUB>O<SUB>6</SUB>) has very high theoretical capacity as a positive electrode material of sodium-ion batteries, but it still has problems such as low actual capacity and poor electronic/ionic conductivity. In order to improve its conductivity, we investigated its structure and electrical properties under high pressure. By performing in situ X-ray diffraction, Raman, infrared absorption, and alternating current impedance spectroscopy in the range of 0-30 GPa at room temperature, we observed a phase transition at ∼11 GPa, with the conductivity increasing by an order of magnitude. Above ∼20 GPa, Na<SUB>2</SUB>C<SUB>6</SUB>O<SUB>6</SUB> gradually amorphized. During the decompression process, the pressure regulation of the structure and properties of the material are reversible. Our study shows that applying external pressure is an effective tool to improve the conductivity of molecular battery materials. The investigation will help to obtain next-generation electrode materials.</P> [FIG OMISSION]</BR>
Zhongyang Li,Qudong Wang,Huaping Tang,Tianwen Liu,Chuan Lei,Haiyan Jiang,Wenjiang Ding 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.10
The variation of microstructure and mechanical properties along the cross section of squeeze cast Al-5Mg-3Zn-1Cu-1Sialloy is studied under both squeeze-cast and peak-aged condition (470 °C × 24 h + 125 °C × 24 h). For squeeze-cast alloy,along the depth direction, second dendrite arm space and the percentage of -Al increase significantly, while the volumefraction of T-Mg32(AlZnCu)49 and Mg2Siphase showed a dramatic decrease. The ultimate tensile strength of squeeze-castalloy slightly decreased from 357.04 MPa for the surface layer to 344.21 MPa for the central layer, yield strength droppedfrom 296.86 MPa to 241.03 MPa, but the elongation almost tripled from 1.42% to 3.78%. After peak aging, the ultimatetensile strength of surface layer and central layer reached 538.45 MPa and 504.03 MPa, yield strength reached 447.46 MPaand 442.65 MPa, and the elongation reached 5.23% and 3.97% respectively. Meanwhile the difference of ultimate tensilestrength and elongation was increased, but that of yield strength reduced after aging treatment. Precipitation strengtheningis the main strengthening mechanism while the improvement in ductility is due to the dissolution of T-Mg32(AlZnCu)49 andthe morphological change of eutectic Mg2Si.
Peng Lan,Liang Li,Zhanpeng Tie,Haiyan Tang,Jiaquan Zhang 대한금속·재료학회 2019 METALS AND MATERIALS International Vol.25 No.6
A plane stress model was developed to study the coupled effect of mold taper and corner radius on the thermal–mechanicalbehavior of a 250 mm × 280 mm continuously cast bloom for a given special steel. Good agreement was obtained in both shellthickness and the off-corner cracking location from modeling and trial experiment. The results show that increasing moldtaper results in the obvious decrease of surface temperature near the corner, while enlarging mold corner radius makes theshell surface temperature at the corner region more even with the mold taper between 0 and 1.5% m−1. It is also found thatboth the mold corner radius and taper are the key factors influencing the shell crack sensitivity but with different mechanism. For the internal crack, the mold taper takes more dominant effect for its corner radius between 0–10 mm, as the hoop strainat the solidification front decreases with increasing mold taper. For the surface crack, more sensitivity is noticed to the moldcorner radius. Increasing mold corner radius leads to the increase of the surface hoop strain in the corner region, almostregardless of mold taper. The proper mold taper and corner radius for the present bloom casting should be 1.0–1.5% m−1and 15–25 mm respectively.