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Off-hours admission does not impact outcomes in patients undergoing primary percutaneous coronary intervention and with a first medical contact-to-device time within 90 min

作者： GAO Si-ze NI Bang-fa ZHANG Gui-ying XIAO Cai-jin LIU Cun-xiong CHEN Zhe NIE Peng LIU Chao ZHAO Chang-jun College of Physics Science and Engineering Technology Guangxi University

This system is designed to pick up sound signals from large volume,low-threshold energy, low-background superheated droplets bubble detectors.A sound-sensitive bubble detector is composed of a container filled with a mixture of superheated droplets and gel,a temperature and pressure control system,and an audio acquisition system attached on the outer surface of the container.The superheated droplets are in a metastable and superheated state at ambient temperature and pressure.When the outside

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Chinese Medical Journal 2021年第15期134卷 1795-1802页

作者： Wen-Jian Ma si-De gao si-Zhuang Huang Xu-ze Lin Yue-Jin Yang Meng-Yue Yu Department of Cardiology Fuwai HospitalNational Center for Cardiovascular DiseasesChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100037China

Background:It remains unclear whether the outcomes of ST-elevation myocardial infarction(STEMI)patients treated with primary percutaneous coronary intervention(PPCI)during off-hours are as favorable as those treated during on-hours,especially those with a first medical contact-to-device(FMC-to-device)time within 90 min.We aimed to determine whether off-hours admission impacted late outcomes in patients undergoing PPCI and with an FMC-to-device time0.05).According to the Cox regression analyses,off-hours admission was not a predictor of 2-year MACEs(P=0.788).similarly,the Kaplan-Meier curves showed that the risks of a MACE,all-cause death,reinfarction,and target vessel revascularization were not significantly different between the two groups(P>0.05).Conclusions:This real-world,multicenter retrospective study demonstrated that for STEMI patients who underwent PPCI within 90 min,off-hours admission was safe,with no difference in the risk of 2-year M

关键词： First medical contact-to-device time ST-segment elevation myocardial infarction Primary percutaneous coronary intervention Major adverse cardiovascular events Off-hours

High cycle rotating bending fatigue performance and fracture behavior in a pearlite-ferrite dual-phase steel

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Journal of Iron and Steel Research(International) 2022年第3期29卷 519-528页

作者： Xin-bo Ji si-xin Zhao Li-ming Fu Jian Peng Jia-qiang gao Da-jiang Yu Zong-ze Huang Ai-dang Shan School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghai200240China Baosteel Research Institute Baoshan Iron and Steel Co.Ltd.Shanghai201900China

To clarify the effects of ferrite morphologies and contents on high-cycle fatigue property of pearlite-ferrite dual-phase(DP)steel used for fabrication of commercial vehicle crankshafts,two types of DP steels with different ferrite grain sizes(S10:13.1μm and S30:21.4μm)and ferrite contents(S10:~9.5 vol.%and S30:~30.4 vol.%)were prepared.Stress amplitude-logarithm of number of high cycles to failure fatigue of the two DP steels was evaluated.Experimental results showed a fatigue strength of 510 and 400 MPa for S10 and S30 steels,respectively,at 10^(7) cycles.Fatigue cracks in S10 steel extended preferentially along the grain boundary,but it was easy for crack propagation to extend within a pearlite colony to form a zigzag crack morphology.Crack roughness was enhanced and high stress was introduced to the crack surface due to this kind of crack propagation behavior,which has positive effects on slowing down crack propagation.However,the crack propagation in S30 steel mainly occurred inside the soft equiaxed coarse ferrite grain.Analysis revealed that little stress was introduced to the crack surface.These results show that it is possible to improve high cycle fatigue strength of pearlite-ferrite DP steel by appropriately manipulating the volume fraction and microstructure morphology of ferrite phase.

关键词： Pearlite-ferrite steel Ferrite morphology Ferrite content Fatigue perfomance Fracture characteristics

Mechanically robust bamboo node and its hierarchically fibrous structural design

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National Science Review 2023年第2期10卷 199-211页

作者： si-Ming Chen si-Chao Zhang Huai-Ling gao Quan Wang LiChuan Zhou Hao-Yu Zhao Xin-Yu Li Ming Gong Xiao-Feng Pan Chen Cui ze-Yu Wang YongLiang Zhang HengAn Wu Shu-Hong Yu Department of Chemistry Institute of Biomimetic Materials & Chemistry Anhui Engineering Laboratory of Biomimetic MaterialsDivision of Nanomaterials & Chemistry Hefei National Research Center for Physical Sciences at the Microscale Institute of Energy Hefei Comprehensive National Science Center University of Science and Technology of China CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern MechanicsEngineering and Materials Science Experiment CenterUniversity of Science and Technology of China Institute of Innovative Materials (I2M) Department of Materials Science and EngineeringDepartment of Chemistry Southern University of Science and Technology

Although short bamboo nodes function in mechanical support and fluid exchange for bamboo survival,their structures are not fully understood compared to unidirectional fibrous internodes.Here,we identify the spatial heterostructure of the bamboo node via multiscale imaging strategies and investigate its me chanical properties by multimodal mechanical tests.We find three kinds of hierarchical fiber reinforcement schemes that originate from the bamboo node,including spatially tightened interlocking,triaxial interconnected scaffolding and isotropic intertwining.These reinforcement schemes,built on porous vascular bundles,microfibers and more-refined twist-aligned nanofibers,govern the structural stability of the bamboo via hierarchical toughening.In addition,the spatial liquid transport associated with these multiscale fibers within the bamboo node is experimentally verified,which gives perceptible evidence for life-indispensable multidirectional fluid exchange.The functional integration of mechanical reinforcement and liquid transport reflects the fact that the bamboo node has opted for elaborate structural optimization rather than ingredient richness.This study will advance our understanding of biological materials and provide insight into the design of fiber-reinforced structures and biomass utilization.

关键词： biological materials bamboo node hierarchical fiber structural reinforcement functional integration

Modified tungsten oxide as a binder-free anode in lithium-ion battery for improving electrochemical stability

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Tungsten 2022年第4期4卷 356-369页

作者： Jia-Bin Hou Ke Zhang Jin-Hua Xiao Zi-Qi Xu Wen-Jing gao Xin-Yi gao si-Ke Zhou ze-Zhou Jiao Meng-Ru Yi Yan-Hong Yin Zi-Ping Wu Faculty of Materials Metallurgy and Chemistry Jiangxi University of Science and TechnologyGanzhou341000China Chongyi Zhangyuan Tungsten Co. LtdGanzhou341000China Ganzhou Key Laboratory of Advanced Metals and Functional Materials Ganzhou341000China

As the anode active substance of lithium ions battery(LIB),the low conductivity/ion diffusivity and large volume changes of tungsten oxide(WO_(3))lead to its serious polarization during the lithiation/delithiation process,decreasing the cycling stability.To address these challenges,a binder-free anode consisting of nitrogen-doped tungsten oxide nanosheets,encapsulated in carbon layers(N-doped WO_(3)@CL)and entangled with carbon nanotubes macro-films(CMF),was successfully synthesized through a combination of hydrothermal and online assembly method.Compared with the pristine tungsten oxide entangled with carbon nanotubes macro-films(WO_(3)@CMF),the synthesized N-doped WO_(3)@CL@CMF as a binder-free LIB anode demonstrated better electrochemical performance,which could be attributed to(1)surface defects of WO_(3)created by N dopant providing more channels to improve Li^(+)diffusion,(2)the N-doped WO_(3)@CL with a flower-like structure shortening the diffusion length of Li^(+)ions and further leading to high Li^(+)incorporation,and(3)carbon layers and carbon nanotubes synergistically alleviating the large volume change of the N-doped WO_(3)@CL@CMF electrode during the charging and discharging process.The present study offers insights into employing nitrogen dopant and a carbon matrix to mediate the conductivity and wrapped structure in the WO_(3)semiconductor powder,which provides an important strategy for large-scale design of the binder-free LIB anode with high performance.

关键词： Tungsten oxide Nitrogen-doped Carbon layers Carbon nanotubes Binder-free anode

Mir-30d increases intracellular survival of Helicobacter pylori through inhibition of autophagy pathway

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World Journal of Gastroenterology 2016年第15期22卷 3978-3991页

作者： Xiao-Jun Yang Ruo-Huang si Yu-He Liang Bing-Qiang Ma ze-Bin Jiang Bin Wang Peng gao Department of General Surgery Gansu Provincial Hospital Department of General Surgery The People’s Hospital of Baoji City

AIM: To determine if mir-30 d inhibits the autophagy response to Helicobacter pylori(H. pylori) invasion and increases H. pylori intracellular survival.METHODS: The expression of mir-30 d was detected by quantitative polymerase chain reaction(PCR), and autophagy level was examined by transmission electron microscopy, western blot, and GFP-LC3 puncta assay in human AGS cells and GES-1 cells. Luciferase reporter assay was applied to confirm the specificity of mir-30 d regulation on the expression of several core molecules involved in autophagy pathway. The expression of multiple core proteins were analyzed at both the m RNA and protein level, and the intracellular survival of H. pylori after different treatments was detected by gentamicin protection assay.RESULTS: Autophagy level was increased in AGS and GES-1 cells in response to H. pylori infection, which was accompanied by upregulation of mir-30 d expression(P sion. mir-30 d mimic decreased the luciferase activity of wild type reporter plasmids carrying the 3′ untranslated region(UTR) of all five tested genes(ATG2B, ATG5, ATG12, BECN1, and BNIP3L), whereas it had no effect on the mutant reporter plasmids. These five genes are core genes of autophagy pathway, and their expression was reduced significantly after mir-30 d mimic transfection(P siON: Mir-30 d increases intracellular survival of H. pylori in gastric epithelial cells through inhibition of multiple core proteins in the autophagy pathway.

关键词： mir-30d Helicobacter pylori Autophagy Gene expression Gastric cancer

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酒钢强磁Ⅰ段球磨机吐出矿石回收利用研究

矿冶工程 2009年第4期29卷 36-38页

作者：司胜高泽宾酒钢选矿厂甘肃嘉峪关735100

酒钢选矿厂强磁球磨机吐块直接丢弃,造成资源浪费。通过模拟选矿厂的生产流程进行了强磁球磨机吐块回收利用的实验室可磨性、可选性试验研究,取得了较好的试验指标,并通过应用评价,为回收利用该部分资源提供了依据,工业应用取得了较好... 详细信息

酒钢选矿厂强磁球磨机吐块直接丢弃,造成资源浪费。通过模拟选矿厂的生产流程进行了强磁球磨机吐块回收利用的实验室可磨性、可选性试验研究,取得了较好的试验指标,并通过应用评价,为回收利用该部分资源提供了依据,工业应用取得了较好效果。

关键词：选矿吐块可磨性可选性

Luminescent properties of Ce^(3+),Er^(3+) co-doped La_3si_6N_(11)

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Journal of Rare Earths 2019年第3期37卷 248-252页

作者： Yuan Xue Ronghui Liu Yuanhong Liu Huibing Xu Guantong Chen Xia Zhang Wei gao ze Jiang National Engineering Research Center for Rare Earth Materials General Research Institute for Nonferrous Metals Grirem Advanced Materials Co. Ltd.

In order to obtain near-infrared phosphor pumped by blue chip with high luminous efficiency, a novel near-infrared phosphor Ce^(3+)/Er^(3+) doped La_3si_6N_(11) was designed and firstly prepared via conventional solid-state reactions. The structure and morphology of Ce^(3+)/Er^(3+) doped La_3si_6N_(11) were investigated by X-ray diffraction(XRD) and scanning electron microscopy(SEM). Compared with Er^(3+) doped La_3si_6N_(11),the emission intensity of the Ce^(3+), Er^(3+) co-doped phosphor can be increased more than 5 times.Meanwhile, the mechanism of energy transfer from Ce^(3+) to Er^(3+) is confirmed according to the excitation,emission spectra and decay lifetimes curve. Above results suggest that La_3 si_6 N_(11):Ce^(3+),Er^(3+) is a promising near-infrared phosphor for blue pumped LEDs(light-emitting diodes).

关键词： Solid state reaction Energy transfer Near-infrared phosphor La3si6N11:Ce3+ Er3+ Rare earths

Light hybrid micro/nano-robots:From propulsion to functional signals

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Nano Research 2022年第6期15卷 5355-5375页

作者： Yuxin gao ze Xiong Jizhuang Wang Jinyao Tang Dan Li College of Chemistry and Materials Science Jinan UniversityGuangzhou 510632ChinaGuangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and ApplicationsJinan UniversityGuangzhou 510632China Department of Chemistry The University of Hong KongHong KongChina

Untethered motile micro/nanorobots(MNRs)that can operate in hard-to-reach small space and perform noninvasive tasks in cellular level hold bright future in healthcare,nanomanufacturing,biosensing,and environmental remediation.Light,as a flexible encoding method with tunable freedom of intensity,wavelength,polarization,and propagation direction,endows unique spatialtemporal precision and dexterity to the manipulation of MNRs.Meanwhile,light has been extensively investigated as functional signals in bioimaging,phototherapy,as well as photoelectrochemical reactions.The hybridization of light and other actuation method ushers in novel MNRs with broadened design space,improved controllability,and advanced functionality.In this review,the fundamental mechanisms of light-driven MNRs will be revisited.On top of it,light hybrid systems,coupling with magnetic,electric,chemical,or ultrasound field,will be reviewed,with light for propulsion or as functional signal.The rational hybridization of multiple stimulus in MNRs not only promises simple combination of two driving forces,but more importantly,motivates rethinking of light-driven MNRs for unprecedented applications.

关键词： micro/nanorobots micro/nanomotors multiple stimulus light-driven functional signals

High-Entropy Spinel Oxide Nanofibers as Catalytic Sulfur Hosts Promise the High Gravimetric and Volumetric Capacities for Lithium–Sulfur Batteries

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Energy & Environmental Materials 2022年第2期5卷 645-654页

作者： Liyuan Tian ze Zhang Sheng Liu Guoran Li Xueping gao Institute of New Energy Material Chemistry School of Materials Science and EngineeringRenewable Energy Conversion and Storage CenterNankai UniversityTianjin 300350China

The exploration of new catalytic hosts is highly important to tackle the sluggish electrochemical kinetics of sulfur redox for achieving high energy density of lithium–sulfur batteries.Herein,for the first time,we present high-entropy oxide(HEO,(Mg_(0.2)Mn_(0.2)Ni_(0.2)Co_(0.2)Zn_(0.2))Fe_(2)O_(4))nanofibers as catalytic host of sulfur.The HEO nanofibers show a synergistic effect among multiple metal cations in spinel structure that enables strong chemical confinement of soluble polysulfides and fast kinetics for polysulfide conversion.Consequently,the S/HEO composite displays the high gravimetric capacity of 1368.7 mAh g^(−1) at 0.1 C rate,excellent rate capability with the discharge capacity of 632.1 mAh g^(−1) at 5 C rate,and desirable cycle stability.Furthermore,the S/HEO composite shows desirable sulfur utilization and good cycle stability under a harsh operating condition of high sulfur loading(4.6 mg cm^(−2))or low electrolyte/sulfur ratio(5μL mg^(−1)).More impressively,the high volumetric capacity of 2627.9 mAh cm^(−3) is achieved simultaneously for the S/HEO composite due to the high tap density of 1.92 g cm^(−3),nearly 2.5 times of the conventional sulfur/carbon composite.Therefore,based on high-entropy oxide materials,this work affords a fresh concept of elevating the gravimetric/volumetric capacities of sulfur cathodes for lithium–sulfur batteries.

关键词： catalytic host high-entropy oxide lithium-sulfur battery polysulfide conversion spinel oxide nanofibers