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1Time-sensitivity of the Kaiser effect of acoustic emission in limestone and its application to measurements of in-situ stress显示文摘Measuring in-situ stress by using the Kaiser effect in rocks has such advantages as time- effi ciency, low cost and little limitation, but the precision of the method is dependent on rock properties and delay time of the measurement. In this paper, experiments on the Kaiser effect in limestones were performed, and it was found that the limestones had good ability to retain a memory of their recent stress history and high time-sensitivity. The longer the experiment was delayed from the extraction of the stone, the larger the Felicity ratio was. As the Felicity ratio approached 1, signifi cant Kaiser effect was observed. In-situ stress should be determined by the limestone measurements when the delay time was 40-120 days. Finally, the in-situ stress in a limestone formation could be successfully measured in practice.Jin Yan Qi Zili Chen Mian Zhang Guangqing Xu Guangqiang 2009Petroleum Science2009,6,2:15
2Tensile and Fracture Properties of 15 vol% SiC_p/2009Al Composites Fabricated by Hot Isostatic Pressing and Hot Extrusion Processes显示文摘15 vol% silicon carbide particle(Si Cp)-reinforced 2009 Al matrix(15 vol% Si Cp/2009Al) composites were fabricated by hot isostatic pressing(HIP) and hot extrusion processes. The tensile and fracture properties of 15 vol% Si Cp/2009 Al were studied. The results showed that hot extrusion increased the ultimate tensile strength(UTS), yield strength(YS), elongation(EL), reduction in area(RA), and fracture toughness of the composites. The heat treatment resulted in the increase in UTS, YS, and fracture toughness, but a decrease in EL and RA. Both hot extrusion and heat treatment had negligible effects on elastic modulus(E). With the increase of Si Cpsize, the UTS, YS, and E decreased, but the EL and RA increased. The fracture toughness increased first and then decreased with increasing Si Cpsize, and when the Si Cpsize was about 7 lm, the composites obtained the maximum fracture toughness value of 31.74 MPa m^(1/2).Junhui Nie Jianzhong Fan Shaoming Zhang Shaohua Wei Tao Zuo Zili Ma Zhaobing Xiang 2014Acta Metallurgica Sinica(English Letters)2014,27,5:8
3Temperature dependence of the point defect properties of GaN thin films studied by terahertz time-domain spectroscopy显示文摘The dielectric functions of GaN for the temperature and frequency ranges of 10–300 K and 0.3–1 THz are obtained using terahertz time-domain spectroscopy.It is found that there are oscillations of the dielectric functions at various temperatures.Physically,the oscillation behavior is attributed to the resonance states of the point defects in the material.Furthermore,the dielectric functions are well fitted by the combination of the simple Drude model together with the classical damped oscillator model.According to the values of the fitting parameters,the concentration and electron lifetime of the point defects for various temperatures are determined,and the temperature dependences of them are in accordance with the previously reported result.Therefore,terahertz time-domain spectroscopy can be considered as a promising technique for investigating the relevant characteristics of the point defects in semiconductor materials.FANG HeNan ZHANG Rong LIU Bin LI YeCao FU DeYi LI Yi XIE ZiLi ZHUANG Zhe ZHENG YouDou WU JingBo JIN BiaoBing CHEN Jian WU PeiHeng 2013Science China(Physics,Mechanics & Astronomy)2013,56,11:6
4Stabilization and trajectory tracking of autonomous airship's planar motion显示文摘The stabilization and trajectory tracking problems of autonomous airship’s planar motion are studied. By defining novel configuration error and velocity error, the dynamics of error systems are derived. By applying Lyapunov stability method, the state feedback control laws are designed and the close-loop error systems are proved to be uniformly asymptotically stable by Matrosov theorem. In particular, the controller does not need knowledge on system parameters in the case of set-point stabilization, which makes the controller robust with respect to parameter uncertainty. Numerical simulations illustrate the effectiveness of the controller designed.Zhang Yan Qu Weidong Xi Yugeng Cai Zili 2008Journal of Systems Engineering and Electronics2008,19,5:6
5CO oxidation over ceria supported Au_(22) nanoclusters: Shape effect of the support显示文摘Gold(Au) nanoclusters have recently emerged as ideal models for understanding Au catalysis, because the nanosized Au particles have precise atomic numbers and uniform size. In this work, we studied for the first time the support shape effect on the catalysis of Au nanoclusters by using CO oxidation as a model reaction. Au_(22)(L^8)_6(L = 1,8-bis(diphenylphosphino) octane) nanoclusters were supported on CeO_2 rods or cubes, then pretreated at different temperatures(up to 673 K), allowing the gradual removal of the organic phosphine ligands. CO oxidation test over these differently pretreated samples shows that CeO_2 rods are much better supports than cubes for Au_(22) nanoclusters in enhancing the reaction rate. In situ IR spectroscopy coupled with CO adsorption indicates that the shape of CeO_2 support can impact the nature and quantity of exposed Au sites, as well as the efficiency of organic ligand removal. Although CeO_2 rods are helpful in exposing a greater percentage of total Au sites upon ligands removal, the percentage of active Au sites(denoted by Au d+, 0 < d < 1) is lower than that on CeO_2 cubes. The in situ extended X-ray absorption spectroscopy(EXAFS) and high-angle annular dark-field scanning transmission electron microscopy(HAADF-STEM) results show that the Au nanoclusters bound more strongly to the CeO_2 rods than to the cubes where the Au nanoclusters show more sintering. Considering the typical redox mechanism for CO oxidation over supported Au nanoclusters and nanoparticles, it is concluded that the reactivity of the lattice oxygen of CeO_2 is the determining factor for CO oxidation over Au_(22)/CeO_2. CeO_2 rods offer more reactive lattice oxygen and abundant oxygen vacancies than the cubes and thus make the rods a superior support for Au nanoclusters in catalyzing low temperature CO oxidation.Zili Wu David R.Mullins Lawrence F.Allard Qianfan Zhang Laisheng Wang 2018Chinese Chemical Letters2018,29,6:4
6Significance of neuroglobin in serum of acute atherosclerotic cerebral infarction patients显示文摘This study sought to examine neuroglobin (NGB) in the serum of acute cerebral infarction patients with double-antibody sandwich enzyme-linked immunosorbent assay to identify all risk factors, calculate infarct size, assess neurological impairment, and analyze the relation between NGB and each of these factors. The double-antibody sandwich assay indicated that levels of NGB in serum were unaltered within 6 hours following acute cerebral infarction compared with normal levels. NGB levels then underwent a distinct change, peaking at 24 hours then returning to normal levels in 72 hours. The results suggest that the level of NGB might be related to infarct size and low-density lipoprotein at 24 hours after acute cerebral infarction. There were no significant differences in neurological impairment scores and infarct size at different periods following infarction. The findings indicated that the level of NGB in serum of acute cerebral infarction patients was correlated with infarct time.Shoucai Zhao Zhaohu Chu Lingsong Ma Yinong Chen Lei Wang Benxiao Wang Zili Huang Jun Zhang 2011Neural Regeneration Research2011,6,27:4
7Genetic and Molecular Characterization of H9N2 Avian Influenza Viruses Isolated from Live Poultry Markets in Hubei Province, Central China, 2013–2017显示文摘H9N2 subtype avian influenza virus(AIV)is an influenza A virus that is widely spread throughout Asia,where it jeopardizes the poultry industry and provides genetic material for emerging human pathogens.To better understand the epidemicity and genetics of H9 subtype AIVs,we conducted active surveillance in live poultry markets(LPMs)in Hubei Province from 2013 to 2017.A total of 4798 samples were collected from apparent healthy poultry and environment.Realtime RT-PCR revealed that the positivity rate of influenza A was 26.6%(1275/4798),of which the H9 subtype accounted for 50.3%(641/1275)of the positive samples.Of the 132 H9N2 viral strains isolated,48 representative strains were subjected to evolutionary analysis and genotyping.Phylogenetic analysis revealed that all H9N2 viral genes had 91.1%–100%nucleotide homology,clustered with genotype 57,and had high homology with human H9N2 viruses isolated from2013 to 2017 in China.Using a nucleotide divergence cutoff of 95%,we identified ten distinct H9N2 genotypes that continued to change over time.Molecular analysis demonstrated that six H9N2 isolates had additional potential glycosylation sites at position 218 in the hemagglutinin protein,and all isolates had I155 T and Q226 L mutations.Moreover,44 strains had A558 V mutations in the PB2 protein and four had E627 V mutations,along with H9N2 human infection strains A/Beijing/1/2016 and A/Beijing/1/2017.These results emphasize that the H9N2 influenza virus in Hubei continues to mutate and undergo mammalian adaptation changes,indicating the necessity of strengthening the surveillance of the AIV H9N2 subtype in LPMs.Zhibin Hu Fuhu Peng Zhenghui Xiong Wanpo Zhang Tingting Li Yuejun Shi Jun Xie Xin Jin Jingjing Huang Hongde Xiao Dingren Bi Nianhua Song Zili Li 2021Virologica Sinica2021,36,2:4
8Progress on AlGaN-based solar-blind ultraviolet photodetectors and focal plane arrays显示文摘Solar-blind ultraviolet(UV)photodetectors(PDs)have attracted tremendous attention in the environmental,industrial,military,and biological fields.As a representative Ill-nitride material,AlGaN alloys have broad development prospects in the field of solar-blind detection due to their superior properties,such as tunable wide bandgaps for intrinsic UV detection.In recent decades,a variety of AlGaN-based PDs have been developed to achieve high-precision solar-blind UV detection.As integrated optoelectronic technology advances,AlGaN-based focal plane arrays(FPAs)are manufactured and exhibit outsta nding solar-blind imaging capability.Con sidering the rapid development of AlGaN detection techniques,this paper comprehensively reviews the progress on AlGaN-based solar-blind UV PDs and FPAs.First,the basic physical properties of AlGaN are presented.The epitaxy and p-type doping problems of AlGaN alloys are then discussed.Diverse PDs,including photoconductors and Schottky,metal-semiconductor-metal(MSM),p-i-n,and avalanche photodiodes(APDs),are dem on strated,and the physical mechanisms are analyzed to improve device performance.Additionally,this paper summarizes imaging technologies used with AlGaN FPAs in recent years.Benefit!ng from the development of AlGaN materials and optoelectronic devices,solar-blind UV detection technology is greeted with significant revolutions.Qing Cai Haifan You Hui Guo Jin Wang Bin Liu Zili Xie Dunjun Chen Hai Lu Youdou Zheng Rong Zhang 2021Light(Science & Applications)2021,10,6:4
9Naringenin is a Potential Immunomodulator for Inhibiting Liver Fibrosis by Inhibiting the cGAS-STING Pathway显示文摘Background and Aims:Naringenin is an anti-inflammatory flavonoid that has been studied in chronic liver disease.The mechanism specific to its antifibrosis activity needs further investigation This study was to focused on the cyclic guanosine monophosphate-adenosine monophosphate synthase(cGAS)pathway in hepatic stellate cells and clarified the antifibrosis mechanism of naringenin.Methods:The relationship between the cGAS-stimulator of interferon genes(STING)pathway and liver fibrosis was analyzed using the Gene Expression Omnibus database.Histopathology,immunohistochemistry,fluorescence staining,Western blotting and polymerase chain reaction were performed to assess gene and protein expression levels associated with the cGAS pathway in clinical liver tissue samples and mouse livers.Molecular docking was performed to evaluate the relationship between naringenin and cGAS,and western blotting was performed to study the expression of inflammatory factors downstream of cGAS in vitro.Results:Clinical database analyses showed that the cGAS-STING pathway is involved in the occurrence of chronic liver disease.Naringenin ameliorated liver injury and liver fibrosis,decreased collagen deposition and cGAS expression,and inhibited inflammation in carbon tetrachloride(CCl4)-treated mice.Molecular docking found that cGAS may be a direct target of naringenin.Consistent with the in vivo results,we verified the inhibitory effect of naringenin on activated hepatic stellate cells(HSCs).By using the cGAS-specific agonist double-stranded(ds)DNA,we showed that naringenin attenuated the activation of cGAS and its inflammatory factors affected by dsDNA.We verified that naringenin inhibited the cGAS-STING pathway,thereby reducing the secretion of inflammatory factors by HSCs to ameliorate liver fibrosis.Conclusions:Interrupting the cGAS-STING pathway helped reverse the fibrosis process.Naringenin has potential as an antihepatic fibrosis drug.Li Chen Siwei Xia Shuqi Wang Yuanyuan Zhou Feixia Wang Zhanghao Li Yang Li Desong Kong Zili Zhang Jiangjuan Shao Xuefen Xu Feng Zhang Shizhong Zheng 2023Journal of Clinical and Translational Hepatology2023,11,1:3
10Methionine metabolism in chronic liver diseases:an update on molecular mechanism and therapeutic implication显示文摘As one of the bicyclic metabolic pathways of one-carbon metabolism,methionine metabolism is the pivot linking the folate cycle to the transsulfuration pathway.In addition to being a precursor for glutathione synthesis,and the principal methyl donor for nucleic acid,phospholipid,histone,biogenic amine,and protein methylation,methionine metabolites can participate in polyamine synthesis.Methionine metabolism disorder can aggravate the damage in the pathological state of a disease.In the occurrence and development of chronic liver diseases(CLDs),changes in various components involved in methionine metabolism can affect the pathological state through various mechanisms.A methionine-deficient diet is commonly used for building CLD models.The conversion of key enzymes of methionine metabolism methionine adenosyltransferase(MAT)1 A and MAT2A/MAT2B is closely related to fibrosis and hepatocellular carcinoma.In vivo and in vitro experiments have shown that by intervening related enzymes or downstream metabolites to interfere with methionine metabolism,the liver injuries could be reduced.Recently,methionine supplementation has gradually attracted the attention of many clinical researchers.Most researchers agree that adequate methionine supplementation can help reduce liver damage.Retrospective analysis of recently conducted relevant studies is of profound significance.This paper reviews the latest achievements related to methionine metabolism and CLD,from molecular mechanisms to clinical research,and provides some insights into the future direction of basic and clinical research.Zhanghao Li Feixia Wang Baoyu Liang Ying Su Sumin Sun Siwei Xia Jiangjuan Shao Zili Zhang Min Hong Feng Zhang Shizhong Zheng 2020Signal Transduction and Targeted Therapy2020,5,1:3
11Study of high pressure sintering behavior of CBN composites starting with CBN-Al mixtures显示文摘Cubic boron nitride(CBN) composites starting with CBN-Al mixtures were sintered on WC-16 wt%Co substrate under static high pressure of 5.0 GPa at temperatures of 800 to 1 400℃for 30 min.Vickers hardness of the sintered samples increased with increasing CBN content and the highest hardness of 32.7 GPa was achieved for the CBN-5 wt%Al specimens sintered at 1 400℃.The reactions between CBN and Al started to occur at about 900℃and the reaction products strongly depended on the Al content,sintering temperature and Co diffused from the substrates according to the x-ray diffraction(XRD) observations.The CBN composite sintered at 1 200℃from a CBN-15 wt%Al mixture showed the best cutting performance.Li Yongjun Li Sicheng Lv Ran Qin Jiaqian Zhang Jian Wang Jianghua Wang Fulong Kou Zili He Duanwei (Institute of Atomic and Molecular Physics,Sichuan University,Chengdu 610065,China) 2008金刚石与磨料磨具工程2008,28,S1:3
12Succinate dehydrogenase SDH1–1 positively regulates cotton resistance to Verticillium dahliae through a salicylic acid pathway显示文摘Background:Verticillium wilt,caused by the soil-borne fungus of Verticillium dahliae Kleb.,is one of the most devastating diseases of cotton.The complex mechanism underlying cotton resistance to Verticillium wilt remains uncharacterized.Identifying an endogenous resistance gene may be helpful to control this disease.Previous studies revealed that succinate dehydrogenase(SDH)is involved in reactive oxygen species(ROS)-induced stress signaling pathway that is likely to be triggered by salicylic acid(SA).Here,through the metabolomics and differential expression analyses in wilt-inoculated cotton(Gossypium hirsutum),we noticed that Gh SDH1–1 gene in cotton may play an important role in the resistance to V.dahlia.Then we reported Gh SDH1–1 gene and its functional analysis in relation to the resistance of cotton to V.dahliae.Results:The Gh SDH1–1 gene in cotton root was significantly up-regulated after V.dahlia inoculation,and its expression level peaked at 12 and 24 h post-infection.SA can also induce the up-regulation of Gh SDH1–1.Additionally,the functional analysis showed that Gh SDH1–1-silenced cotton was more susceptible to V.dahliae than the control because of the significant decrease in abundance of immune-related molecules and severe damage to the SA-signaling pathway.In Arabidopsis thaliana,high expression of Gh SDH1–1 conferred high resistance to V.dahliae.Arabidopsis that overexpressed Gh SDH1–1 had higher resistance to V.dahliae infection compared with the wild-type.Conclusions:Our findings provide new insights into the role of Gh SDH1–1;it positively regulates cotton resistance to Verticillium wilt.The regulatory mechanism of Gh SDH1–1 is closely related to SA-related signaling pathway.ZHANG Xiangyue FENG Zili ZHAO Lihong LIU Shichao WEI Feng SHI Yongqiang FENG Hongjie ZHU Heqin 2020Journal of Cotton Research2020,3,2:3
13Structural properties of GaN(0001) epitaxial layers revealed by high resolution X-ray diffraction显示文摘High-resolution X-ray diffraction has been used to analyze GaN(0001) epitaxial layers on sapphire substrates. Several structural properties of GaN, including the lattice constants, strains, and dislocation densities are revealed by the technique of X-ray dffraction (XRD). Lattice constants calculated from the omega/2theta scan are c=0.5185 nm and a=0.3157 nm. Also, the in-plane strain is -1.003%, while out of the plane, the epitaxial film is almost relaxed. Several methods are used to deduce the mosaicity and dislocation density of GaN, showing that the edge type dislocations are the overwhelming majority.XIE ZiLi 1,2,3, ZHOU YuanJun 1 , SONG LiHong 1,2 , LIU Bin 1 , HUA XueMei 1,2 , Xiu XiangQian 1 , ZHANG Rong 1,2,3 & ZHENG YouDou 1,2,3 1 JiangSu Provincial Key Laboratory of Advanced Photonic and Electronic Materials and Department of Physics, Nanjing University, Nanjing 210093, China 2 Nanjing National Laboratory of Microstructures, Nanjing 210093, China 3 NJU-Yangzhou Institute of Opto-electronics, Yangzhou, 225001, China 2010Science China(Physics,Mechanics & Astronomy)2010,53,1:3
14Simulation of growing GaN in vertical HVPE reactor显示文摘The paper reports the setting up of a model of fluid dynamic for GaN HVPE system and the simulation. It is found that when the direction of gravity is opposite to the direction of GaCl flow inlet,there exits a distance at which the uniformity of the deposition is optimal. Here the good uniformity of the deposition is obtained when the distance between the substrate and GaCl inlet is 5 cm. The parameters of gas flow used in growing GaN are also optimized. In addition, the influence of gravity and buoyancy on the deposition of GaN is discussed, too. It is found that the angle between the direction of gravity and the direction of GaCl flow inlet has a major effect on the deposition rate and the uniformity of the growth. Compared with the situation when the direction of gravity is the same with the direction of GaCl flow inlet, although the deposition rate of GaN has decreased obviously, the uniformity of the deposition has improved largely when the direction of gravity is opposite to the direction of GaCl flow inlet.ZHAO ChuanZhen, XIU XiangQian , ZHANG Rong , XIE ZiLi, LIU Bin, LIU ZhanHui, YAN HuaiYue & ZHENG YouDou Jiangsu Provincial Key Laboratory of Advanced Photonic and Electronic Materials, Department of Physics, Nanjing University, Nanjing 210093, China 2010Science China(Physics,Mechanics & Astronomy)2010,53,1:3
15Effect of the V/Ⅲ ratio during buffer layer growth on the yellow and blue luminescence in undoped GaN epilayer显示文摘Effect of the V/III ratio during buffer layer growth on the yellow and blue luminescence in undoped GaN epilayer has been studied by means of photoluminescence spectroscopy and high resolution X-ray diffraction.It is found that the densities of screw and edge threading dislocations increase with the V/III ratio of the buffer layer,and the intensities of the yellow luminescence(YL) and blue luminescence(BL) emissions also increase dramatically.However,the density ratio of the edge threading dislocation to the screw threading dislocation remains invariant,as well as the intensity ratio of YL emission to BL emission.It can be concluded from these phenomena that the edge threading dislocation and screw threading dislocation can enhance the YL and BL emissions,respectively.CHAI XuZhao ZHANG Yun LIU Bin XIE ZiLi HAN Ping YE JianDong HU LiQun XIU XiangQian ZHANG Rong ZHENG YouDou 2013Science China(Physics,Mechanics & Astronomy)2013,56,9:2
16Influence of welding parameters on interface evolution and mechanical properties of FSW Al/Ti lap joints显示文摘Friction stir welding(FSW)was performed to produce Al/Ti lap joints under various welding conditions.More heat was generated when rotational rate increased or traversing rate decreased.Two types of Al/Ti interfaces–mixed interface and diffusive interface–were formed under different welding conditions.The diffusive interface was formed with low heat input,and the mixed interface was formed more heat.The grains at the mixed interface were larger than those at the diffusive interface because of the higher heat input.Moreover,the microstructure of the mixed interface had a lower texture intensity compared with that of the diffusive interface,which was attributed to the enhanced continuous dynamic recrystallization(CDRX).TiAl3 was formed at the diffusive interface.When the interface varied to the mixed interface as heat input increased,TiAl was fomed within the Al/Ti mixture following the formation of TiAl3.In addition,TiAl3 precipitates were observed in the diffusion layer.The hardness value of the mixed interface was higher than 350 HV,due to the larger amount of intermetallic compounds(IMCs).The lap shear strength reached a maximum value of 147 MPa with medium heat input and an interface that exits in a critical state between diffusive and mixed interfaces.All the specimens fractured at the interface,which was attributed to the presence of IMCs.Mingrun Yu Hongyun Zhao Zhihua Jiang Zili Zhang Fei Xu Li Zhou Xiaoguo Song 2019Journal of Materials Science & Technology2019,35,8:2
17Multifaceted functions of STING in human health and disease:from molecular mechanism to targeted strategy显示文摘Since the discovery of Stimulator of Interferon Genes(STING)as an important pivot for cytosolic DNA sensation and interferon(IFN)induction,intensive efforts have been endeavored to clarify the molecular mechanism of its activation,its physiological function as a ubiquitously expressed protein,and to explore its potential as a therapeutic target in a wide range of immune-related diseases.With its orthodox ligand 2’3’-cyclic GMP–AMP(2’3’-cGAMP)and the upstream sensor 2’3’-cGAMP synthase(cGAS)to be found,STING acquires its central functionality in the best-studied signaling cascade,namely the cGAS–STING–IFN pathway.However,recently updated research through structural research,genetic screening,and biochemical assay greatly extends the current knowledge of STING biology.A second ligand pocket was recently discovered in the transmembrane domain for a synthetic agonist.On its downstream outputs,accumulating studies sketch primordial and multifaceted roles of STING beyond its cytokine-inducing function,such as autophagy,cell death,metabolic modulation,endoplasmic reticulum(ER)stress,and RNA virus restriction.Furthermore,with the expansion of the STING interactome,the details of STING trafficking also get clearer.After retrospecting the brief history of viral interference and the milestone events since the discovery of STING,we present a vivid panorama of STING biology taking into account the details of the biochemical assay and structural information,especially its versatile outputs and functions beyond IFN induction.We also summarize the roles of STING in the pathogenesis of various diseases and highlight the development of small-molecular compounds targeting STING for disease treatment in combination with the latest research.Finally,we discuss the open questions imperative to answer.Zili Zhang Haifeng Zhou Xiaohu Ouyang Yalan Dong Alexey Sarapultsev Shanshan Luo Desheng Hu 2023Signal Transduction and Targeted Therapy2023,8,1:2
18A garnet-electrolyte based molten Li-I_(2) battery with high performance显示文摘Lithium-iodine(Li-I_(2))battery exhibits high potential to match with high-rate property and large energy density.However,problems of the system,such as evident sublimation of iodine elements,dissolution of iodine species in electrolyte,and lithium anode corrosion,prevent the practical use of rechargeable Li-I_(2)batteries.In this work,a molten Li-I_(2)typical cell design which has distinct advantages based on the solid-state garnet electrolyte with the eutectic iodate cathode is firstly developed.The U-shaped ceramic electrolyte tube can separate Li anode from the eutectic iodate cathode,so as to better tackle the above-mentioned inherent challenges for the liquid electrolyte systems.Without self-discharging and lithium anode corrosion,this solid-state battery system demonstrates high safety margin and excellent electrochemical performance.Also,the simple battery structure also indicates the easy assembly process and recycling of electrode materials.With the cathode loading of 593 mg in a single cell,an energy density of~506.7 Wh·kg^(-1)was achieved at 1 C and a long-term cycling life for 2,000 cycles also displays negligible capacity decay.Bin Sun Panpan Wang Jing Xu Qianzheng Jin Zili Zhang Hui Wu Yang Jin 2022Nano Research2022,15,5:2
19Inhibition of ASCT2 induces hepatic stellate cell senescence with modified proinflammatory secretome through an IL-1α/NF-κB feedback pathway to inhibit liver fibrosis显示文摘Senescence of activated hepatic stellate cells(aHSCs) is a stable growth arrest that is implicated in liver fibrosis regression.Senescent cells often accompanied by a multi-faceted senescence-associated secretory phenotype(SASP).But little is known about how alanine-serine-cysteine transporter type-2(ASCT2),a high affinity glutamine transporter,affects HSC senescence and SASP during liver fibrosis.Here,we identified ASCT2 is mainly elevated in aHSCs and positively correlated with liver fibrosis in human and mouse fibrotic livers.We first discovered ASCT2 inhibition induced HSCs to senescence in vitro and in vivo.The proinflammatory SASP were restricted by ASCT2 inhibition at senescence initiation to prevent paracrine migration.Mechanically,ASCT2 was a direct target of glutaminolysisdependent proinflammatory SASP,interfering IL-1α/NF-κB feedback loop via interacting with precursor IL-1α at Lys82.From a translational perspective,atractylenolide Ⅲ is identified as ASCT2 inhibitor through directly bound to Asn230 of ASCT2.The presence of -OH group in atractylenolide Ⅲ is suggested to be favorable for the inhibition of ASCT2.Importantly,atractylenolide Ⅲ could be utilized to treat liver fibrosis mice.Taken together,ASCT2 controlled HSC senescence while modifying the proinflammatory SASP.Targeting ASCT2 by atractylenolide Ⅲ could be a therapeutic candidate for liver fibrosis.Feixia Wang Zhanghao Li Li Chen Ting Yang Baoyu Liang Zili Zhang Jiangjuan Shao Xuefen Xu Guoping Yin Shijun Wang Hai Ding Feng Zhang Shizhong Zheng 2022Acta Pharmaceutica Sinica B2022,12,9:2
20High-efficiency green micro-LEDs with GaN tunnel junctions grown hybrid by PA-MBE and MOCVD显示文摘We fabricated p-i-n tunnel junction(TJ)contacts for hole injection on c-plane green micro-light-emitting diodes(micro-LEDs)by a hybrid growth approach using plasma-assisted molecular beam epitaxy(PA-MBE)and metal–organic chemical vapor deposition(MOCVD).The TJ was formed by an MBE-grown ultra-thin unintentionally doped In Ga N polarization layer and an n^(++)∕n^(+)-GaN layer on the activated p^(++)-Ga N layer prepared by MOCVD.This hybrid growth approach allowed for the realization of a steep doping interface and ultrathin depletion width for efficient inter-band tunneling.Compared to standard micro-LEDs,the TJ micro-LEDs showed a reduced device resistance,enhanced electroluminescence intensity,and a reduced efficiency droop.The size-independent J-V characteristics indicate that TJ could serve as an excellent current spreading layer.All these results demonstrated that hybrid TJ contacts contributed to the realization of high-performance micro-LEDs with long emission wavelengths.YAOZHENG WU BIN LIU FEIFAN XU YIMENG SANG TAO TAO ZILI XIE KE WANG XIANGQIAN XIU PENG CHEN DUNJUN CHEN HAI LU RONG ZHANG YOUDOU ZHENG 2021Photonics Research2021,9,9:2
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