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Song, Yingze,Zhao, Wen,Kong, Long,Zhang, Li,Zhu, Xingyu,Shao, Yuanlong,Ding, Feng,Zhang, Qiang,Sun, Jingyu,Liu, Zhongfan The Royal Society of Chemistry 2018 ENERGY AND ENVIRONMENTAL SCIENCE Vol.11 No.9
<P>Lithium-sulfur (Li-S) batteries are deemed as one of the most promising next-generation energy storage systems. However, their practical application is hindered by existing drawbacks such as poor cycling life and low Coulombic efficiency due to the shuttle effect of lithium polysulfides (LiPSs). We herein present an <I>in situ</I> constructed VO2-VN binary host which combines the merits of ultrafast anchoring (VO2) with electronic conducting (VN) to accomplish smooth immobilization-diffusion-conversion of LiPSs. Such synchronous advantages have effectively alleviated the polysulfide shuttling, promoted the redox kinetics, and hence improved the electrochemical performance of Li-S batteries. As a result, the sulfur cathode based on the VO2-VN/graphene host exhibited an impressive rate capability with ∼1105 and 935 mA h g<SUP>−1</SUP> at 1C and 2C, respectively, and maintained long-term cyclability with a low capacity decay of 0.06% per cycle within 800 cycles at 2C. More remarkably, favorable cyclic stability can be attained with a high sulfur loading (13.2 mg cm<SUP>−2</SUP>). Even at an elevated temperature (50 °C), the cathodes still delivered superior rate capacity. Our work emphasizes the importance of immobilization-diffusion-conversion of LiPSs toward the rational design of high-load and long-life Li-S batteries.</P>
Wang, Xia,Wang, Hong,Li, Qiang,Li, Hongsen,Xu, Jie,Zhao, Guoxia,Li, Hongliang,Guo, Peizhi,Li, Shandong,Sun, Yang-kook The Electrochemical Society 2017 Journal of the Electrochemical Society Vol.164 No.13
<P>A promising anode material for lithium-ion batteries (LIBs) consisting of Sb2Se3 nanorods and reduced graphene oxide (rGO) sheets has been prepared by an effective solvothermal approach. The synergetic effect between Sb2Se3 nanorods and rGO matrix provides not only high conductivity paths and strong electron contact interface, but also alleviates the volume change of Sb2Se3 nanorods, resulting in excellent lithium-storage performance. When tested as an anode material for LIBs, a high capacity of 868.30 mAh g(-1) can be retained after 100 cycles at 200 mA g(-1). Even at 2000 mA g(-1), a satisfactory capacity of 430.40 mAh g(-1) after long 550 cycles can be delivered. Ex situ X-ray diffraction study suggests that the Sb2Se3/rGO composite follows the combined Li+ intercalation, conversion reaction and alloying reaction mechanism. These features suggest the Sb2Se3/rGO composite a viable choice for application as an anode material in high-performance LIBs. (C) 2017 The Electrochemical Society. All rights reserved.</P>
Cho, Kangwoo,Lee, Seonggeun,Kim, Hyeonjeong,Kim, Hyung-Eun,Son, Aseom,Kim, Eun-ju,Li, Mengkai,Qiang, Zhimin,Hong, Seok Won Elsevier BV 2019 Applied Catalysis B Vol.257 No.-
<P><B>Abstract</B></P> <P>We herein provide photoelectrochemical (PEC) disinfection activities of anodically prepared TiO<SUB>2</SUB> nanotube (TNT) arrays (diameter ˜ 100 nm, length ˜ 16 μm on average) that were electrochemically self-doped before (bk-TNT) and after (bl-TNT) an atmospheric annealing at 450 °C. The X-ray diffraction indicated predominating anatase TiO<SUB>2</SUB> signal on bl-TNT, while substantial lattice distortion was noticed for bk-TNT. Although the X-ray photoelectron spectra indicated negligible Ti<SUP>3+</SUP> on surface of both TNTs, linear sweep (cyclic) voltammetry and electrochemical impedance spectrometry confirmed the bk-TNT to show greater double layer capacitance and overall photocurrent, coupled with lower charge transfer resistance. Nevertheless, the PEC disinfection of <I>E. coli</I> was significantly invigorated on bl-TNT, while the bactericidal rates in tap water were comparable or even far greater than those in 0.1 M Na<SUB>2</SUB>SO<SUB>4</SUB> solutions, depending on [<I>E. coli</I>]<SUB>0</SUB> (10<SUP>5</SUP> or 10<SUP>7</SUP> CFU/mL). Under a presumed diffusion-controlled kinetic regime in this study, observed effects of capacitance and electrolyte could be interpreted in terms of electrostatic interaction between the electrical double layer of photoanodes and charged bio-solids, such as repulsion by co-ions (SO<SUB>4</SUB> <SUP>2−</SUP>) and adsorption/surface blocking. Analogous PEC experiments on model organic compounds degradation (4-chlorophenol and methylene blue) corroborated a long-term stability of the bl-TNT (up to 30 consecutive cycles) and the role of surface hydroxyl radical as the primary oxidant.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Self-doped anatase (bl-TNT) and amorphous TiO<SUB>2</SUB> nanotube (bk-TNT) were interrogated. </LI> <LI> Lower double layer capacitance of bl-TNT led to higher PEC disinfection of <I>E. coli</I>. </LI> <LI> PEC bactericidal rates in tap water were similar or greater than in Na<SUB>2</SUB>SO<SUB>4</SUB> solution. </LI> <LI> Electrostatic interaction between photoanode and bio-solids determined the kinetics. </LI> <LI> Commercial applicability for point-of-use disinfection was demonstrated. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Li, Tao,Xu, Hang,Yang, Lu,Tan, Ping,Wei, Qiang Elsevier 2019 Clinica chimica acta Vol.492 No.-
<P><B>Abstract</B></P> <P><B>Background</B></P> <P>To determine the predictive value of preoperative lymphocyte-to-monocyte ratio (LMR) for pathological and survival outcomes in upper tract urothelial carcinoma (UTUC) after radical nephroureterectomy (RNU).</P> <P><B>Methods</B></P> <P>This retrospective study included 704 UTUC patients between 2008 and 2017. We used a cutoff LMR of 3.6 to evaluate its relationship with oncological outcomes after RNU, using the Kaplan–Meier method and logistic regression models.</P> <P><B>Results</B></P> <P>During median follow-up of 39 months, decreased preoperative LMR was an independent predictor of poor pathological outcomes. Kaplan–Meier analysis revealed that patients with low LMR (<3.6) had poor cancer-specific survival (CSS), recurrence-free survival (RFS), and overall survival (OS); this prognostic value was ascertained for patients with high pathological grade and more advanced stage UTUC, but not for patients with low pathological features. Multivariate Cox proportional hazards model revealed that low LMR was an independent predictor of poor CSS, RFS and OS [hazard ratio (HR) = 1.42, <I>P</I> = 0.02; HR = 1.39, <I>P</I> = 0.008; HR = 1.38, <I>P</I> = 0.017, respectively].</P> <P><B>Conclusion</B></P> <P>Preoperative low LMR was an independent predictor of poor pathological and oncological outcomes of UTUC after RNU. Subgroup analysis confirmed that the prognostic value of LMR was confined to patients with a high pathological grade and more advanced stage tumor.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Preoperative low lymphocyte-to-monocyte ratio (LMR) predicts worse pathologic result for upper tract urothelial carcinoma (UTUC) patients after radical nephroureterectomy (RNU). </LI> <LI> Preoperative low LMR is associated with poor clinical outcomes for UTUC patients after RUN. </LI> <LI> Preoperative low LMR exert a prognostic value mainly for UTUC patient with high pathologic grade and stage tumor. </LI> </UL> </P>
黎珏辰(Li Juechen),?强(Chen Qiang) 동아인문학회 2019 동아인문학 Vol.49 No.-
Hainan Li nationality’s plant dyeing technology has a long history. Its cultural implication is embodied in three aspects: primitive thinking, color concept and health concept. These three aspects reflect the “son of nature” Li nationality"s life attitude and code of conduct which originated from nature, followed nature, integrated with nature and returned to nature. In the modernization process of Li nationality society, the inheritance of the dyeing techniques of Li nationality plants faces two major challenges: insufficient sources of dyes and insufficient successors of dyeing techniques. Thanks to the efforts of the local government and all sectors of society, these two major problems are being solved. Under the background of modern fast-paced life, the inheritors of Li nationality"s plant dyeing technique fight the coldness of mechanical age with concentration and craft. This kind of life aesthetics can enlighten people living in the industrial age with increasingly mechanical and monotonous life style, and urge them to pursue the natural and plain life style in line with the requirements of ecological aesthetics.
Park, Su-Min,Li, Qiang,Ryu, Min-Ok,Nam, Aryung,An, Ju-Hyun,Yang, Ji-In,Kim, Sang-Min,Song, Woo-Jin,Youn, Hwa-Young Elsevier 2020 Veterinary immunology and immunopathology Vol. No.
<P><B>Abstract</B></P> <P>Preconditioning with hypoxia or hypoxia-mimetic agents has been tried with mesenchymal stem cells (MSCs) to improve the secretion of anti-inflammatory factors. These preconditioning procedures upregulate hypoxia inducible factor (HIF) 1-alpha leading to the transcription of HIF-dependent tissue protective and anti-inflammatory genes. Due to the limited number of studies exploring the activity of deferoxamine (DFO)—a hypoxia-mimetic agent—in MSCs, we aimed to determine whether DFO can enhance the secretion of anti-inflammatory substances in canine adipose tissue-derived (cAT)-MSCs. Furthermore, we investigated whether this activity of DFO could affect macrophage polarization and activate anti-inflammatory reactions. cAT-MSCs preconditioned with DFO exhibited enhanced secretion of anti-inflammatory factors such as prostaglandin E2 and tumor necrosis factor-α-stimulated gene-6. To evaluate the interaction between DFO preconditioned cAT-MSCs and macrophages, RAW 264.7 cells were co-cultured with cAT-MSCs using the Transwell system, and changes in the expression of factors related to macrophage polarization were analyzed using the quantitative real-time PCR and western blot assays. When RAW 264.7 cells were co-cultured with DFO preconditioned cAT-MSCs, the expression of M1 and M2 markers decreased and increased, respectively, compared to co-culturing with non-preconditioned cAT-MSCs. Thus, cAT-MSCs preconditioned with DFO can more effectively direct and reprogram macrophage polarization into the M2 phase, an anti-inflammatory state.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Deferoxamine enhances the secretion of anti-inflammatory substances in cAT-MSCs. </LI> <LI> DFO preconditioned cAT-MSCs exhibit enhanced prostaglandin E2 and TSG-6 secretion. </LI> <LI> DFO preconditioned cAT-MSCs reprogram macrophage polarization into the M2 phase. </LI> <LI> Preconditioning of cAT-MSCs with DFO may be applicable clinically. </LI> </UL> </P>
Ren, Jun,Song, Kai-he,Li, Zhenhuan,Wang, Qiang,Li, Jun,Wang, Yingxiong,Li, Debao,Kim, Chan Kyung Elsevier 2018 APPLIED SURFACE SCIENCE - Vol.456 No.-
<P><B>Abstract</B></P> <P>The first principle calculations with on-site Coulomb repulsion U terms were carried out to investigate the 5-hydroxymethylfurfural (HMF) adsorption on the CuO(1 1 1) and Co<SUB>3</SUB>O<SUB>4</SUB>(1 1 0) surfaces, two widely used oxidation catalysts. The adsorption of HMF molecule is energetically favoured in both cases, and HMF is more inclined to bridge adsorption via hydroxyl and formyl groups binding with surface O and metal sites. Moreover, the adsorption energy relies on both the coordination type of surface lattice oxygen to which the H atom binds and the formation of H-bond involving hydroxyl and formyl groups on the adsorbed HMF. Also, the hydroxyl OH bond breaking is very easy and is likely to be the first step in HMF oxidation, and then the OH insertion reaction to produce 2,5-furandicarboxylic acid (FDCA). The corresponding experimental results also show that the CuO and Co<SUB>3</SUB>O<SUB>4</SUB> surfaces are promising candidate catalysts.</P> <P><B>Highlights</B></P> <P> <UL> <LI> CuO(1 1 1) and Co<SUB>3</SUB>O<SUB>4</SUB>(1 1 0) surfaces catalyze the oxidation of 5-hydroxymethylfurfural (HMF). </LI> <LI> Initial binding was formed through bridged-adsorption with O atoms in HMF. </LI> <LI> Oxidation reaction proceeds through the OH bond breaking pathway. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>Schematic potential energy diagram for the formyl CH and hydroxyl OH bonds of HMF dissociation on CuO(1 1 1) and Co<SUB>3</SUB>O<SUB>4</SUB>(1 1 0) surfaces. Obviously, the hydroxyl OH bond breaking is easier than that of the formyl CH bond on the two surfaces, which indicates the first step of oxidation of HMF to FDCA should be hydroxyl OH bond breaking.</P> <P>[DISPLAY OMISSION]</P>
Proanthocyanidins accelerate the germination of cucumber (Cucumis sativus L.) seeds
Li-jun Zhu,Xing-guang Deng,Li-juan Zou,Jun-qiang Wu,Da-wei Zhang,Honghui Lin 한국식물학회 2016 Journal of Plant Biology Vol.59 No.2
Proanthocyanidins (PAs) are the end products of the flavonoid biosynthetic pathway in many seeds, but their biological function is rarely unknown during seed germination. In the present study, we observed that PAs pretreatment accelerated cucumber seeds germination with maximum efficiency at 0.15% by measuring germination percentage and radical length. Using inhibitors of abscisic acid (ABA), gibberellins (GA) and alternative oxidase (AOX) and H2O2 scavenger pretreatment and gene expression analysis, we found that the accelerated effect of 0.15% PAs on seed germination was due to the decreased ABA biogenesis and enhanced GA production. ROS are induced by PAs pretreatment. Then, the enhanced ROS contributed to GA and ethylene accumulation and ABA decrease in seeds. Moreover, the improvement of GA was involved in the further induction of antioxidant enzymes activities. Therefore, our findings uncover a novel role of PAs in seed germination and clarify the relationships between ROS, ABA, GA and ethylene during seed germination.
Simplified Algorithm of the Novel Steel-concrete Mixed Structure under Lateral Load
Li, Liang,Li, Guo-qiang,Liu, Yu-shu Council on Tall Building and Urban Habitat Korea 2012 International journal of high-rise buildings Vol.1 No.4
In order to improve the seismic behaviors of traditional steel-concrete mixed structure, a novel steel concrete mixed structure consisting of steel frames braced with buckling restrained braces (BRBs) and a concrete tube is proposed. Based on several assumptions, the simplified mechanical model of the novel mixed structure is established, and the shear and bending stiffness formulas of the steel frames, BRBs and concrete tube are respectively introduced. The equilibrium differential equation of the novel mixed structure under horizontal load is developed based on the structural elastic theory. The simplified algorithms to determine the lateral displacement and internal forces of the novel mixed structure under the inverted-triangle distributed load, uniformly load and top-concentrated load are then obtained considering several boundary conditions and compatible deformation conditions. The effectiveness of the simplified algorithms is verified by FEM comparison.