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58篇 您的检索式:作者名="LEI Yongjun"
    题名 作者 年代 出处 被引量
1Production of bioactive ginsenoside compound K in metabolically engineered yeast显示文摘Xing Yan Yun Fan Wei Wei Pingping Wang Qunfang Liu Yongjun Wei Lei Zhang Guoping Zhao Jianmin Yue Zhihua Zhou 2014Cell Research2014,24,6:81
2Stenting for symptomatic intracranial arterial stenosis in China:1-year outcome of a multicentre registry study显示文摘background and purpose A multicentre prospective registry study of individually tailored stenting for a patient with symptomatic intracranial atherosclerotic stenosis(ICAS)combined with poor collaterals in China showed that the short-term safety and efficacy of stenting was acceptable.However,it remained uncertain whether the low event rate could be of a long term.We reported the 1-year outcome of this registry study to evaluate the long-term efficacy of individually tailored stenting for patients with severe symptomatic ICAS combined with poor collaterals.Methods Patients with symptomatic ICAS caused by 70%-99% stenosis located at the intracranial internal carotid,middle cerebral,intracranial vertebral or basilar arteries combined with poor collaterals were enrolled.Balloon-mounted stent or balloon plus self-expanding stent were selected based on the ease of vascular access and lesion morphology determined by the operators.The primary outcome was the rate of 30-day stroke,transient ischaemic attack and death,and 12-month ischaemic stroke within the same vascular territory,haemorrhagic stroke and vascular death after stenting.results From September 2013 to January 2015,300 patients(ages 58.3±9.78 years)were recruited.Among them,159 patients were treated with balloon-mounted stent and 141 with balloon plus self-expanding stent.During the 1-year follow-up,25 patients had a primary end point event.The probability of primary outcome at 1 year was 8.1%(95% CI 5.3% to 11.7%).In 76 patients with digital subtraction angiography follow-up,27.6%(21/76)had re-stenosis≥50% and 18.4%(14/76)had re-stenosis≥70%.No baseline characteristic was associated with the primary outcome.Conclusion The event rate remains low over 1 year of individually tailored stenting for patients with severe symptomatic ICAS combined with poor collaterals.Further randomised trial of comparing individually tailored stenting with best medical therapy is needed.Ning Ma Yong Zhang Jie Shuai Changchun Jiang Qiyi Zhu Kangning Chen Li Liu Baomin Li Xiangqun Shi Lianbo Gao Yajie Liu Feng Wang Yongli Li Tieyan Liu Hongbo Zheng Dapeng Mo Feng Gao Yilong Wang Yongjun Wang Lei Feng Zhongrong Miao 2018Stroke & Vascular Neurology2018,3,3:29
3Research Progress on Heat Stress of Rice at Flowering Stage显示文摘Global warming has caused frequent occurrence of heat stress at the flowering stage of single-season rice in the Yangtze River region of China, which results in declines of spikelet fertility and yield in rice. Rice flowering stage is the most sensitive period to high temperatures, and therefore, the key for heat stress happening is the flowering stage coinciding with high temperature, which causes spikelet fertility decreasing in heat-sensitive varieties, and is the major factor for heat injury differences among various rice planting regions. With the development of rice breeding, temperature indexes for heat stress has been converted from daily maximum temperature of 35 oC to 38 oC with the stress duration of more than 3 d. During the flowering stage, anther dehiscence inhibition and low pollen shedding onto the stigma are two main reasons for spikelet fertility reduction under high temperatures. At panicle initiation stage, high temperatures aggravate spikelet degeneration, and destroy floral organ development. Various types of rice varieties coexist in production, and indica-japonica hybrid rice demonstrates the highest heat resistance in general, followed by indica and japonica rice varieties. In production, avoiding high temperature is the main strategy of preventing heat stress, and planting suitable cultivars and adjustment of sowing date are the most effective measures. Irrigation is an effective real-time cultivation measure to decline the canopy temperature during the rice flowering stage. We suggested that further study should be focused on exploring heat injury differences among different rice variety types, and innovating rice-planting methods according to planting system changes in rice planting regions with extreme heat stress. Meanwhile, high temperature monitor and warning systems should be improved to achieve optimal heat stress management efficiencies.WANG Yaliang WANG Lei ZHOU Jianxia HU Shengbo CHEN Huizhe XIANG Jing ZHANG Yikai ZENG Yongjun SHI Qinghua ZHU Defeng ZHANG Yuping 2019Rice science2019,26,1:13
4Generation of hircine-induced pluripotent stem cells by somatic cell reprogramming显示文摘Jiangtao Ren Yongjun Pak Lixiazi He Lei Qian Yijun Gu Hui Li Lingjun Rao Jing Liao Chun Cui Xun Xu Jinqiu Zhou Hakchol Ri Lei Xiao 2011Cell Research2011,21,5:10
5Porous bimetallic Pt-Fe nanocatalysts for highly efficient hydrogenation of acetone显示文摘多孔的 Pt-Fe 二金属的 nanocrystals 被综合了经由自己组装并且能有效地从丙酮便于 2-propanol 的合成。二金属的催化剂为一个连续过程有三维的隧道和多达 972 h 1 的表演周转频率(TOF ) 超过 50 h。初步的机械学的研究建议高反应与由二金属的 Pt-Fe 合金和 Fe 2 O 3x 。一基于模型系统理解真实催化行为和催化机制被显示了帮助制作改进 Pt/Fe 3 有为大规模工业应用有大潜力的增加的活动和一生的 O 4 催化剂。Yongjun Ji Yuen Wu Guofeng Zhao Dingsheng Wang Lei Liu Wei He Yadong Li 2015Nano Research2015,8,8:10
6Mechanosignaling activation of TGFβmaintains intervertebral disc homeostasis显示文摘Intervertebral disc(IVD) degeneration is the leading cause of disability with no disease-modifying treatment.IVD degeneration is associated with instable mechanical loading in the spine, but little is known about how mechanical stress regulates nucleus notochordal(NC) cells to maintain IVD homeostasis. Here we report that mechanical stress can result in excessive integrin α_vβ_6-mediated activation of transforming growth factor beta(TGFβ), decreased NC cell vacuoles, and increased matrix proteoglycan production, and results in degenerative disc disease(DDD). Knockout of TGFβ type II receptor(TβRII) or integrin α_v in the NC cells inhibited functional activity of postnatal NC cells and also resulted in DDD under mechanical loading.Administration of RGD peptide, TGFβ, and α_vβ_6-neutralizing antibodies attenuated IVD degeneration. Thus,integrin-mediated activation of TGFβ plays a critical role in mechanical signaling transduction to regulate IVD cell function and homeostasis. Manipulation of this signaling pathway may be a potential therapeutic target to modify DDD.Qin Bian Lei Ma Amit Jain Janet L Crane Khaled Kebaish Mei Wan Zhengdong Zhang X Edward Guo Paul D Sponseller Cheryle A Seguin Lee H Riley Yongjun Wang Xu Cao 2017Bone Research2017,5,1:9
7A novel two-layered optical satellite network of LEO/MEO with zero phase factor显示文摘Optical satellite communication has advantages over the RF satellite communication in capacity, speed, secrecy and anti-interference.Space information superhighway composed of GEO/MEO/LEO satellites which are linked by optical inter-satellite links(OISL) would play important roles in communication, navigation, martial recon, remote sensing and deep space exploration.A novel LEO/MEO two-layered optical satellite network with global coverage is designed with the street-of-coverage technique.The layer of LEO satellites is the walker-delta constellation with zero phase factor and has the quasi-stable logical structure of Mesh.Equatorial and polar orbit satellites constitute the layer of MEO satellite, which can cover LEO layer effectively.Rising satellites of the system can provide 99.9% of coverage for the whole globe and 100% for China averagely.The network can provide a minimum elevation angle at 21 ? with single-satellite visibility for China, and at 16 ? with the dual-satellite visibility.Simulation results of the inter-satellite links show LEO constellation of zero phase factor outperforms non-zero phase factor constellations in azimuth angle, elevation angle and distance, which is very fit for the OISL.Simulation results of the communication performance indicate a little difference between short wave band and long wave band at low communication speed(several Gbit/s);however, the wave band at 1550 nm is a better choice at high communication speed(100 Gbit/s).LI YongJun , WU JiLi, ZHAO ShangHong, MENG Wen, MA LiHua, SHI Lei, CHU XingChun, HOU Rui & LI Tian Telecommunication Engineering Institute, Air Force Engineering University, Xi’an 710077, China 2010Science China(Information Sciences)2010,53,6:8
8Mutation of kri1l causes definitive hematopoiesis failure via PERK-dependent excessive autophagy induction显示文摘Xiao-E Jia Ke Ma Tao Xu Lei Gao Shuang Wu Cong Fu Wenjuan Zhang Zhizhang Wang Kaiyu Liu Mei Dong Changbin Jing Chunguang Ren Zhiwei Dong Yi Chen Yi Jin Qiuhua Huang Xing Chang Min Deng Li Li Lingfei Luo Jun Zhu Yongjun Dang Hung-Chun Chang Leonard I Zon Yi Zhou Saijuan Chen Weijun Pan 2015Cell Research2015,25,8:8
9Hexagonal boron nitride nanosheet for effective ambient N2 fixation to NH3显示文摘Industrial production of NH3 from N2 and H2 significantly relies on Haber-Bosch process,which suffers from high energy consume and CO2 emission.As a sustainable and environmentally-benign alternative process,electrochemical artificial N2 fixation at ambient conditions,however,is highly required efficient electrocatalysts.In this study,we demonstrate that hexagonal boron nitride nanosheet (h-BNNS) is able to electrochemically catalyze N2 to NH3.In acidic solution,h-BNNS catalyst attains a high NH3 formation rate of 22.4 μg·h-1·mg-1cat.and a high Faradic efficiency of 4.7% at-0.75 V vs.reversible hydrogen electrode,with excellent stability and durability.Density functional theory calculations reveal that unsaturated boron at the edge site can activate inert N2 molecule and significantly reduce the energy barrier for NH3 fonmation.Ya Zhang Huitong Du Yongjun Ma Lei Ji Haoran Guo Ziqi Tian Hongyu Chen Hong Huang Guanwei Cui Abdullah M. Asiri Fengli Qu Liang Chen Xuping Sun 2019Nano Research2019,12,4:5
10Research on Large Volume Airgun Source Signal Reception in Hutubi, Xinjiang Using Seismic Network Data显示文摘We used data from the Xinjiang Digital Seismic Network and PSD( Power Spectral Density) method to perform noise level assessment for six stations. We calculated the median of the power spectral density to evaluate the noise level of different stations. After the comparison of the power spectral density of different stations and the airgun signal recognition,we found that noise level of stations with recognizable airgun source signals is lower than that of stations without recognizable signals. The largest difference of the power spectral density is 40 d B,and the smallest is 15 d B. Finally,we found that the failure to recognize the signal of airgun sources at some stations is due to the noise level.Su Jinbo Wang Qiong Wang Haitao Shi Yongjun Chen Xiangjun Feng Lei Chen Hao Zhang Wenxiu 2016Earthquake Research in China2016,30,3:4
11Secondary prevention medication persistence and prognosis of acute ischaemic stroke or transient ischaemic attack显示文摘Introduction The risk of disability and mortality is high among recurrent stroke,which highlights the importance of secondary prevention measures.We aim to evaluate medication persistence for secondary prevention and the prognosis of acute ischaemic stroke or transient ischaemic attack(TIA)in China.Methods Patients with acute ischaemic stroke or TIA from the China National Stroke Registry II were divided into 3 groups based on the percentage of persistence in secondary prevention medication classes from discharge to 3 months after onset(level I:persistence=0%,level II:0%Lei Zhang Junfeng Shi Yuesong Pan Zixiao Li Hongyi Yan Chelsea Liu Wei Lv Xia Meng Yongjun Wang 2021Stroke & Vascular Neurology2021,6,3:3
12Doxorubicin-loaded zein in situ gel for interstitial chemotherapy of colorectal cancer显示文摘The aim of this research was to evaluate doxorubicin(DOX)-loaded zein in situ gels,a new drug delivery system in which a liquid state drug can be transformed into semi-solid after intratumoral injection.In vitro release of DOX-loaded zein was investigated and the pharmacokinetics,biodistribution and therapeutic efficacy of these DOX-loaded zein formulations were investigated using BAI B/c nude tumor-bearing mice.In vitro release of DOX from the gels extended up to 7 days.Efficient accumulation of DOX in the tumor with lower drug concentration in blood and normal organs was obtained resulting in effective inhibition of tumor growth and fewer off-target side effects.In conclusion,a DOX-loaded in situ gel was developed with sustained release,enhanced anti-cancer efficacy for colorectal cancer in vivo,and especially with reduced off-target side effects.Ning Shen Jie Hu Linan Zhang Li Zhang Yongjun Sun Yinghua Xie Shaomei Wu Lei Liu Zibin Gao 2012Acta Pharmaceutica Sinica B2012,2,6:3
13Therapeutic Effect of Human Umbilical Cord Multipotent Mesenchymal Stromal Cells in a Rat Model of Stroke显示文摘Wenbin Liao Jiang Xie Jian Zhong Yongjun Liu Lei Du Bin Zhou Jie Xu Pengxia Liu Shaoguang Yang Jiming Wang Zhibo Han Zhong Chao Han 2009Transplantation2009,,3:2
14Evaluation of energy transfer and utilization efficiency of azo dye removal by different pulsed electrical discharge modes显示文摘The degradation of an azo dye, acid orange 7 (AO7), caused by different high voltage pulsed electrical discharge modes (spark, streamer and corona discharge) induced by the various initial conductivities was investigated. A new type of pulsed high voltage source with thyratron switch and Blumlein pulse forming net (BPFN) was used. The typical discharge waveforms of voltage, current, power, pulse en-ergy and the pictures of spark, streamer and corona discharge modes were presented. The results in-dicated that pulsed electrical discharges led to complete decolorization and substantial decrease of the chemical oxygen demand (COD) of the dye solution. The main intermediate products were monitored by GC-MS. The discharge modes changed from spark to streamer and to corona discharge, and the streamer length decreased with the liquid conductivity increasing. At a constant input power, the peak voltage, peak current, peak power and energy per pulse of the three discharge modes ranked in the following order: spark > streamer > corona. The effective energy transfer efficiency of AO7 removal was higher for spark discharge (57.2%) than for streamer discharge (40.4%) and corona discharge (27.6%). Moreover, the energy utilization efficiency of AO7 removal for spark discharge was 1.035×10^(-9) mol/J, and for streamer and corona discharge they were 0.646×10^(-9) and 0.589×10^(-9) mol/J. Both the energy transfer efficiency and the energy utilization efficiency of spark discharge were the highest.SHEN YongJun LEI LeCheng ZHANG XingWang 2008Chinese Science Bulletin2008,53,12:2
15Robust nonlinear control of spacecraft formation flying using constraint forces显示文摘A robust nonlinear control method is presented for spacecraft precise formation flying.With the constraint forces and consid-ering nonlinearity and perturbations,the problem of the formation keeping is changed to the Lagrange systems with the holonomic constraints and the differential algebraic equations (DAE).The nonlinear control laws are developed by solving the DAE.Because the traditional numerical solving methods of DAE are very sensitive to the various errors and the resulting con-trol laws are not robust in engineering application,the robust control law designed method is further developed by designing the correct coefficients to correct the errors of the formation array constraints.A numeral study simulated the robustness of this method for the various errors in the formation flying mission,including the initial errors of spacecraft formation,the reference satellite orbit determination errors,the relative perturbation forces model errors,and so on.XING JianJun TANG GuoJin CHENG WenKe LEI YongJun 2011Science China(Technological Sciences)2011,54,9:2
16The detection of tetrahydrofuran hydrate formation and saturation using magnetic resonance imaging technique显示文摘Tetrahydrofuran(THF) hydrate was formed in bulk as well as in glass beads pack with a mean diameter of 3.0 mm by controlling the temperature under ambient pressure.Images of THF hydrate formation procedure were obtained using the magnetic resonance imaging(MRI) technique.The experiment results showed that MRI is an effective method for the detection of hydrate formation.Saturation of hydrate formed both in bulk and glass beads can be confirmed by intensity integration of MRI images.Yu Liu Yongchen Song Yongjun Chen Lei Yao Qingping Li 2010Journal of Natural Gas Chemistry2010,19,3:2
17Discovery of carbon-based strongest and hardest amorphous material显示文摘Carbon is one of the most fascinating elements due to its structurally diverse allo tropic forms stemming from its bonding varieties(sp,sp^(2)and sp^(3)).Exploring new forms of carbon has been the eternal theme of scientific research.Herein,we report on amorphous(AM) carbon materials with a high fraction of sp^(3)bonding recovered from compression of fullerene C_(60) under high pressure and high temperature,previously unexplored.Analysis of photoluminescence and absorption spectra demonstrates that they are semiconducting with a bandgap range of 1.5-2.2 eV,comparable to that of widely used AM silicon.Comprehensive mechanical tests demonstrate that synthesized AM-Ⅲ carbon is the hardest and strongest AM material known to date,and can scratch diamond crystal and approach its strength.The produced AM carbon materials combine outstanding mechanical and electronic properties,and may potentially be used in photovoltaic applications that require ultrahigh strength and wear resistance.Shuangshuang Zhang Zihe Li Kun Luo Julong He Yufei Gao Alexander V.Soldatov Vicente Benavides Kaiyuan Shi Anmin Nie Bin Zhang Wentao Hu Mengdong Ma Yong Liu Bin Wen Guoying Gao Bing Liu Yang Zhang Yu Shu Dongli Yu Xiang-Feng Zhou Zhisheng Zhao Bo Xu Lei Su Guoqiang Yang Olga P.Chernogorova Yongjun Tian 2022National Science Review2022,9,1:2
18Spatial externalities in China regional economic growth显示文摘Lei Tian H. Holly Wang Yongjun Chen 2010China Economic Review2010,,:2
19An orthogonal dual-regulation strategy for sensitive biosensing applications显示文摘Biosensing systems based on controllable motion behaviors of droplets have attracted extensive attention,but still face challenges of insufficient sensitivity and uncontrollable dynamic range due to imprecise manipulation of droplet motion on the surfaces.Here,we report an orthogonal dual-regulation strategy for precise motion control of droplets and we demonstrate its utility as a sensitive sensing system with controllable dynamic ranges of sensing for adenosine triphosphate,miRNA,thrombin and kanamycin,as well as discrimination of five kinds of D NA.We endowed a DNA-contained bio-droplet sliding on a lubricant-infused structural surface with micro-grooves to separately adjust the resistance from liquid phase and solid phase.The resistance from liquid phase mainly depended on hydrophobic interaction between DNA and lubricant,which can be finely tuned by different DNA’s average chain length.Meanwhile,the resistance from solid surface was determined by the energy barrier from the periodic micro-grooves,which can be adjusted by varying the droplet’s sliding direction on the surface.The hydrophobic interaction is conformed to be orthogonal to the micro-grooves’anisotropic resistance by three different methods.This orthogonal dual-regulation strategy thus demonstrated its ability to precisely control bio-droplets’motion behaviors and sensitive detection with adjustable dynamic ranges for various bio-targets.The dual-regulation strategy will provide significant insights for super-wettable biosensors,visual inspection and beyond.Xian Yang Jinhua Wang Zhongfeng Gao Weiqi Zhang Hai Zhu Yongjun Song Quan Wang Mingjie Liu Lei Jiang Yu Huang Fan Xia 2022National Science Review2022,9,9:2
20Nonlinear control of multiple spacecraft formation flying using the constraint forces in Lagrangian systems显示文摘Getting inspiration from the constraint forces in the classical mechanics, we presented the nonlinear control method of multiple spacecraft formation flying to accurately keep the desired formation arrays. Considering nonlinearity and perturbation, we changed the question of the formation array control to the Lagrange equations with the holonomic constraints and the differential algebraic equations (DAE), and developed the nonlinear control for design of the follower spacecraft tracking control laws by solving the DAE. Because of using the idea of the constraint forces, this approach can adequately utilize the characteristic of the dynamic equations, i.e., the space natural forces, and accurately keep the arbitrary formation array. Simulation results of the circular formation keeping with the linear and nonlinear dynamical equations were included to illuminate the control performance.XING JianJun LEI YongJun CHENG WenKe TANG GuoJin 2009Science China(Technological Sciences)2009,52,10:2
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