Synchronous immobilization and conversion of polysulfides on a VO₂-VN binary host targeting high sulfur load Li-S batteries

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>

Antimony Selenide Nanorods Decorated on Reduced Graphene Oxide with Excellent Electrochemical Properties for Li-Ion Batteries

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>

Effects of reactive oxidants generation and capacitance on photoelectrochemical water disinfection with self-doped titanium dioxide nanotube arrays

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>

Preconditioning of canine adipose tissue-derived mesenchymal stem cells with deferoxamine potentiates anti-inflammatory effects by directing/reprogramming M2 macrophage polarization

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>

Activation of formyl CH and hydroxyl OH bonds in HMF by the CuO(1 1 1) and Co₃O₄(1 1 0) surfaces: A DFT study

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>

Predictive value of preoperative lymphocyte-to-monocyte ratio for patients with upper tract urothelial carcinoma

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>

黎族植物染色技艺的文化意蕴及当代传承

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.

Chemical Compositions and Volatile Compounds of Tricholoma matsutake from Different Geographical Areas at Different Stages of Maturity

Qiang Li,Li Zhang,Wanhua Li,Xiaolin Li,Wenli Huang,Hua Yang,Linyong Zheng 한국식품과학회 2016 Food Science and Biotechnology Vol.25 No.1

Tricholoma matsutake is a commercially important edible fungus. Volatile compounds, chemical compositions, and nutritional values of fruiting bodies at different stages of maturity from different geographical areas were analyzed. The main volatile compounds in T. matsutake fruiting bodies were (E)-2-octenal, phenylacetaldehyde, 3-octanone, methyl cinnamate, benzaldehyde, and 1- octen-3-ol. Kinds and levels of volatile compounds from different geographical areas varied. As the fruiting bodies aged, levels of methyl cinnamate and 1-octen-3-ol gradually declined. Potassium was the most abundant element in T. matsutake fruiting bodies. Of 17 amino acids detected in fruiting bodies, glutamate was the most abundant. Volatile compounds, chemical compositions, and nutritional values of T. matsutake varied with age and geographical origin and can serve as chemical indicators for classication of T. matsutake from different geographical areas and at different stages of maturity.

Analysis of Bacterial Diversity and Communities Associated with Tricholoma matsutake Fruiting Bodies by Barcoded Pyrosequencing in Sichuan Province, Southwest China

( Qiang Li ),( Xiao Lin Li ),( Cheng Chen ),( Shu Hong Li ),( Wen Li Huang ),( Chuan Xiong ),( Xing Jin ),( Lin Yong Zheng ) 한국미생물 · 생명공학회 2016 Journal of microbiology and biotechnology Vol.26 No.1

Endophytes play an important role in the growth and development of the host. However, the study of endophytes is mostly focused on plants, and reports on bacteria associated with fungi are relatively rare. We studied the bacteria associated with fruiting bodies of Tricholoma matsutake picked from seven main T. matsutake-producing areas in Sichuan, China, by barcoded pyrosequencing. About 8,272 reads were obtained per sample, representing 40 phyla, 103 classes, and 495 genera of bacteria and archaea, and 361.797 operational taxonomic units were observed at a 97% similarity level. The bacterial community was always both more abundant and more diverse than the archaeal community. UniFrac analysis showed there were some difference of bacterial communities among the samples sites. Three bacterial phyla, Proteobacteria, Bacteroidetes, and Firmicutes, were dominant in all samples. Correlation analysis showed there was a significant correlation between some soil properties and bacterial community associated with T. matsutake. This study demonstrated that the bacteria associated with T. matsutake fruiting bodies were diversified. Among these bacteria, we may find some strains that can promote the growth of T. matsutake.

Posttranscriptional deregulation of Src due to aberrant miR34a and miR203 contributes to gastric cancer development

Qiang Hao,Xiao Zhao Lu,Nan Nan Liu,Xiao Chang Xue,Meng Li,Cun Zhang,Xin Qin,Wei Na Li,Zhen Shu,Bin Song,Qing Wang,Li Qiang Song,Wei Zhang,Ying Qi Zhang 생화학분자생물학회(구 한국생화학분자생물학회) 2013 BMB Reports Vol.46 No.6