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52篇 您的检索式:作者名="Jiansen"
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1Transmission Dynamics of an Outbreak of the COVID-19 Delta Variant B.1.617.2——Guangdong Province,China,May-June 2021显示文摘On May 21,2021,a local case of coronavirus disease 2019(COVID-19)was confirmed in a 75-year-old woman(experienced onset of symptoms on May 18)in Liwan District,Guangzhou City,Guangdong Province,China.The number of infections has increased in the following 10 days and led to 5 generations of transmission.Meng Zhang Jianpeng Xiao Aiping Deng Yingtao Zhang Yali Zhuang Ting Hu Jiansen Li Hongwei Tu Bosheng Li Yan Zhou Jun Yuan Lei Luo Zimian Liang Youzhi Huang Guoqiang Ye Mingwei Cai Gongli Li Bo Yang Bin Xu Ximing Huang Yazun Cui Dongsheng Ren Yanping Zhang Min Kang Yan Li 2021China CDC weekly2021,3,27:51
2Effect of high magnetic field on the crystallization of Nd_2Fe_(14)B/α-Fe nanocomposite magnets显示文摘Nd8.1Dy0.9Fe76.95Co8.55B5.5 nanocomposite magnets annealed with and without a 10 T magnetic field were inves-tigated in this article. The ribbons with coexisting amorphous and crystalline phases were selected to do this study. The re-sults of M?ssbauer spectroscopy revealed that the content of α-Fe increased when annealed in high strength magnetic field. The size of the grains also increased considerably after the application of magnetic annealing. All these led to the decrease of the magnetic properties, especially the coercivity of the ribbons.WANG Zhanyong XU Hui NI Jiansen LI Qiang ZHOU Bangxin 2006Rare Metals2006,25,4:6
3Tianwen-1 MINPA observations in the solar wind显示文摘The Mars Ion and Neutral Particle Analyzer(MINPA)is one of the three scientific instruments onboard the Tianwen-1 orbiter to investigate the Martian space environment.During Tianwen-1’s transfer orbit to Mars,the MINPA was switched on to measure the solar wind ions.Here,we present the first results of the MINPA observations in the solar wind.During cruise,nearly half of the MINPA ion field-of-view(FOV)was blocked by the lander capsule;thus only the solar-wind ions with azimuthal speeds pointing towards the unblocked FOV sectors could be detected.We perform a detailed comparison of the MINPA’s solar wind observations with data from Earth-based missions when MINPA reached its count-rate peak,finding a general consistency of the ion moments between them.The blocking effect due to the lander is evaluated quantitatively under varying solar-wind velocity conditions.Despite the blocking effect,the MINPA’s solar wind measurements during the transfer orbit suggest a good performance.AiBing Zhang LingGao Kong WenYa Li Lei Li BinBin Tang ZhaoJin Rong Yong Wei JiJie Ma YiTeng Zhang LiangHai Xie YuXian Wang JianSen He Bin Liu WenJing Wang Bin Su JiaWei Li Xu Tan Fang Wang TaiFeng Jin FuHao Qiao Peter Wurz Yan Zhu YunFei Bai YiRen Li XinBo Zhu YueQiang Sun YongLiao Zou Chi Wang 2022Earth and Planetary Physics2022,6,1:5
4Interpretation of the Traditional Chinese Medicine portion of the diagnosis and treatment protocol for corona virus disease 2019(Trial Version 7)显示文摘The TCM protocol in the Diagnosis and Treatment Protocol for corona virus disease 2019(COVID-19)(Trial Version 7) has been updated from previous versions. The protocol was formulated under the direct leadership of the National Administration of Traditional Chinese Medicine, based on the experience of a panel of experts, supported by evidence from fever clinics and from the outcomes of emergency(EM) observation rooms and inpatients throughout China(especially in Wuhan, Hubei Province) in combination with the latest scientific research results and data. The present interpretation of the TCM protocol is based on an overall understanding of the revised content, and aims to guide and standardize its clinical application to provide a reference for clinicians.Song Ping Zhao Linhua Li Xiuyang Su Jiansen Jiang Zhaoyuan Song Bin Liu Wenke Tang Shuang Lei Ye Ding Qiyou Yang Ze Lin Jiaran Wei Yu Tong Xiaolin 2020Journal of Traditional Chinese Medicine2020,40,3:5
5Investigation on nanocomposite magnets by three-dimensional atom probe显示文摘With the fast development in nano ma- terials, to obtain the detailed microstructure informa- tion, microscopes with much higher resolution than the conventional ones are required. A three-dimen- sional atom probe (3DAP), an instrument with near- atomic resolutions of about 0.06 and 0.2 nm in depth and transverse direction, respectively, has been em- ployed to map out the elemental distribution of some conductive materials within a nano-scale volume. This instrument is fit to analyze the elemental distri- bution in nano materials and nano precipitation in common materials. 3DAP is applied to investigate the microstructure of Nd2Fe14B/α?Fe nanocomposite magnets. B, Fe-enriched, Zr-enriched and Nd, Fe-enriched clusters have been found, which cannot be identified by any other instrument.WANG Zhanyong ZHOU Bangxin NI Jiansen XU Hui 2006Chinese Science Bulletin2006,51,13:4
6Discrete energetic(~50-200 keV) electron events in the high-altitude cusp/polar cap/lobe显示文摘We identified 28 discrete electron events(DEEs) with enhanced fluxes at ~50-200 keV in the high-altitude cusp/polar cap/lobe,using the electron measurements by the BeiDa Image Electron Spectrometer(BD-IES) instrument onboard an inclined(55°)geosynchronous orbit(IGSO) satellite from October 2015 to January 2016. We find that among the 28 DEEs, 22 occur in the nightside and mostly in the northern cusp/polar cap/lobe, while 6 occur in the dayside and all in the southern cusp; 24 events correspond to an average interplanetary magnetic field(IMF) component B_z>0, 3 correspond to an average IMF B_z<0, and 1 has no OMNI IMF data. In these DEEs, the observed average omnidirectional electron differential flux generally fits well to a power-law spectrum, J^E^(-γ), with the spectral index y ranging from 2.6 to 4.6, while the average electron flux varies over three orders of magnitude from event to event. The spectral index of these cusp DEEs are(strongly) larger than the spectral index of solar wind superhalo electrons(radiation belt electrons) observed by the WIND 3 D Plasma & Energetic Particle instrument(the BD-IES). At^110 keV,the electron flux of DEEs in the cusp/polar cap/lobe shows a weak positive correlation with the solar wind superhalo electron flux but no obvious correlation with the radiation belt electron flux. These results suggest that these DEEs probably originate from transient processes acting on the solar wind superhalo electrons, e.g., the mid/high-latitude reconnection.WANG LingHua ZONG QiuGang SHI QuanQi WANG YongFu TU ChuanYi HE JianSen TIAN Hui WIMMER-SCHWEINGRUBER Robert F. ZOU Hong 2017Science China(Technological Sciences)2017,60,12:4
7Kinetics of nitrobenzene degradation coupled to indigenous microorganism dissimilatory iron reduction stimulated by emulsified vegetable oil显示文摘Widespread contamination by nitrobenzene(NB) in sediments and groundwater requires better understanding of the biogeochemical removal process of the pollutant. NB degradation, coupled with dissimilatory iron reduction, is one of the most efficient pollutant removal methods. However, research on NB degradation coupled to indigenous microorganism dissimilatory iron reduction stimulated by electron donors is still experimental. A model for remediation in an actual polluted site does not currently exist.Therefore, in this study, the dynamics was derived from the Michaelis–Menten model(when the mass ratio of emulsified vegetable oil and NB reached the critical value 91:1). The effect of SO_4^(2-), NO_3^-, Ca^(2+)/Mg^(2+), and the grain size of aquifer media on the dynamics were studied, and the NB degradation dynamic model was then modified based on the most significant factors. Utilizing the model, the remediation time could be calculated in a contaminated site.Jun Dong Linjie Ding Zifang Chi Jiansen Lei Yan Su 2017Journal of Environmental Sciences2017,29,4:4
8The function and regulation of OTU deubiquitinases显示文摘Post-translational modification of cellular proteins by ubiquitin regulates numerous cellular processes,including cell division,immune responses,and apoptosis.Ubiquitin-mediated control over these processes can be reversed by deubiquitinases(DUBs),which remove ubiquitin from target proteins and depolymerize polyubiquitin chains.Recently,much progress has been made in the DUBs.In humans,the ovarian tumor protease(OTU)subfamily of DUBs includes 16 members,most of which mediate cell signaling cascades.These OTUs show great variation in structure and function,which display a series of mechanistic features.In this review,we provide a comprehensive analysis of current progress in character,structure and function of OTUs,such as the substrate specificity and catalytic activity regulation.Then we discuss the relationship between some diseases and OTUs.Finally,we summarize the structure of viral OTUs and their function in immune escape and viral survival.Despite the challenges,OTUs might provide new therapeutic targets,due to their involvement in key regulatory processes.Jiansen Du Lin Fu Yingli Sui Lingqiang Zhang 2020Frontiers of Medicine2020,14,5:4
9Therapeutic vaccination with Salmonella -delivered codon-optimized outer inflammatory protein DNA vaccine enhances protection in Helicobacter pylori infected mice显示文摘Jiansen Chen Miaoduan Lin Neng Li Liping Lin Feifei She 2012Vaccine2012,,36:3
10Solar ultraviolet bursts in a coordinated observation of IRIS,Hinode and SDO显示文摘Solar ultraviolet(UV) bursts are small-scale compact brightenings in transition region images. The spectral profiles of transition region lines in these bursts are significantly enhanced and broadened, often with chromospheric absorption lines such as Ni ii 1335.203 and 1393.330 A superimposed. We investigate the properties of several UV bursts using a coordinated observation of the Interface Region Imaging Spectrograph(IRIS), Solar Dynamics Observatory(SDO), and Hinode on February 7, 2015. We have identified 12 UV bursts, and 11 of them reveal small blueshifts of the Ni ii absorption lines. However, the Ni ii lines in one UV burst exhibit obvious redshifts of ~20 km s^-1, which appear to be related to the cold plasma downflows observed in the IRIS slit-jaw images. We also examine the three-dimensional magnetic field topology using a magnetohydrostatic model, and find that some UV bursts are associated with magnetic null points or bald patches. In addition, we find that these UV bursts reveal no obvious coronal signatures from the observations of the Atmospheric Imaging Assembly(AIA) on board SDO and the EUV Imaging Spectrometer(EIS) on board Hinode.CHEN YaJie TIAN Hui ZHU XiaoShuai SAMANTA Tanmoy WANG LingHua HE JianSen 2019Science China(Technological Sciences)2019,62,9:3
11Influence of zirconium addition on the microstructure and magnetic properties of nanocomposite Nd_(10.1)Fe_(78.2-x)Co_5Zr_xB_(6.7) permanent magnets显示文摘Nanocomposite Nd10.1Fe78.2?xCo5ZrxB6.7 (x = 0, 1.5, 2.5, 2.7, 3, 4) permanent magnets were prepared by melt-spun and annealing. The microstructure and magnetic properties of the permanent magnets were investigated. The re- sults reveal that the addition of Zr element significantly reduces the grain size and improves the thermal stability of the amorphous phase. A fine nanocomposite microstructure with an average grain size of about 35 nm can be developed at a wheel speed of 16 m·s?1 with the content of Zr up to 2.7 at.%. After optimal annealing (710°C× 4 min), the magnetic prop- erties of the Nd10.1Fe75.5Co5Zr2.7B6.7 bonded magnets were achieved as follows: Br = 0.72 T, jHc = 769 kA·m?1, and (BH)max = 85.0 kJ·m?3.FENG Shanshan NI Jiansen WANG Zhanyong WU Yisheng ZHOU Bangxin XU Hui 2007Rare Metals2007,26,3:2
12The solar wind plasma upstream of Mars observed by Tianwen-1:Comparison with Mars Express and MAVEN显示文摘On the great journey to Mars,China’s first planetary exploration mission,the Tianwen-1 came within 26 million kilometers of Mars from 31 October 2020 to 25 January 2021 and was getting closer to its destination,the red planet,in search of answers to the cataclysmic climate change that occurred in Martian history.Both the escape of the Martian atmosphere and the loss of surface water were firmly influenced by solar activities.Tianwen-1 provided a unique chance to depict the solar wind streams between Earth and Mars during the minimum of Solar Cycle 25.During the three-month cruise phase of Tianwen-1,the solar wind flows were successively observed at Earth,Tianwen-1,and Mars.After the field of view correction and noise reduction,the solar wind velocity and density measured by Tianwen-1 show good agreement with those at Earth and Mars.The results indicate that the performance of the ion analyzer onboard the Tianwen-1 orbiter is reliable and stable.It is worth looking forward to the joint observations of ion escape with other Mars probes in the following Martian years.Kai FAN Limei YAN Yong WEI Aibing ZHANG Linggao KONG Markus FRÄNZ Fei HE Lihui CHAI Chongjing YUAN Yuqi WANG Jun ZHONG Zhaojin RONG Zhonghua YAO Yongxin PAN Jun CUI Jiansen HE Wenya LI Binbin TANG Chi WANG 2022Science China Earth Sciences2022,65,4:2
13Microstructural characteristics of Nd_2Fe_(14)B/α-Fe nanocomposite ribbons bearing Nb element显示文摘微观结构和磁性上的 Nb 的效果(Nd0.9Dy0.1 ) 9.5Fe79-xCo5NbxB6.5 (x = 0, 1 ) nanocomposite 磁铁被调查。好、一致的微观结构被完成因为带子在 710WANG Zhanyong LIU Wenqing ZHOU Bangxin NI Jiansen XU Hui LI Qiang 2008Rare Metals2008,27,3:2
14Dynamics of the charged particles released from a Sun-grazing comet in the solar corona显示文摘The sun-grazing comet C/2011 W3(Lovejoy)showed a distorted,unconventional tail morphology near its perihelion(1.2Rs).Based on the“Solar Corona and Inner Heliosphere”modeling result of the magnetic field and plasma dynamics in the solar corona,we use the Runge-Kutta method to simulate the moving trajectory of charged dust and ion particles released at different positions from the C/2011 W3 orbit.We find that the dust particles near the sun,which are subject to a strong magnetic Lorentz force,travel differently from their counterparts distant from the sun,where the latter are mainly affected by the solar gravitational force and radiation pressure.According to the simulation results,we propose that the magnetic mirror effect can rebound the charged dust particles back away from the sun and be regarded as one crucial cause of the dust-free zone formation.We find that ions mainly move along magnetic field lines at an acute angle to the comet's direction of motion.The cometary ions'movement direction was determined by the comet's velocity and the coronal magnetic field,which are responsible for the C/2011 W3’s unique comet tail shape near perihelion.Additionally,the ion particles also experience perpendicular drift motion,mainly dominated by the electric field drift,which is similar to and can be used to approximate the solar wind's transverse velocity at its source region.ChuanPeng Hou JianSen He Lei Zhang Ying Wang Die Duan 2021Earth and Planetary Physics2021,5,3:2
15Chromobox homolog 4 overexpression inhibits TNF-α-induced matrix catabolism and senescence by suppressing activation of NF-κB signaling pathway in nucleus pulposus cells显示文摘Intervertebral disc degeneration(IDD)is featured as enhanced catabolism of extracellular matrix(ECM)in the nucleus pulposus(NP),in which tumor necrosis factor-alpha(TNF-α)-related cell senescence is involved.Chromobox homolog protein 4(CBX4)exhibits anti-inflammatory effects and shows promising therapeutic potential.Thus,in the present study,we explore the role of CBX4 in IDD.Immunohistochemistry staining reveals that CBX4 expression is decreased in severe degenerative NP tissues compared to mild degenerative tissues,and real-time PCR and western blot analysis results show that CBX4 expression is downregulated under TNF-αstimulation in NP cells.siRNA and adenoviruses are used to knockdown or overexpress CBX4,respectively.The results demonstrate that CBX4 knockdown augments the catabolism of ECM in human NP cells,while CBX4 overexpression in rat NP cells restores the ECM degradation induced by TNF-α,as illustrated by immunofluorescence and western blot analysis.In addition,transcriptome sequencing results reveal the regulatory effect of CBX4 on the cell cycle,and further western blot analysis and senescence-associatedβ-galactosidase staining assay indicate that CBX4 overexpression alleviates cell senescence in the presence of TNF-α.Moreover,the phosphorylation of p65,which indicates the activation of NF-κB signaling,is measured by western blot analysis and immunofluorescence assay,and the results reveal that CBX4 overexpression reduces the TNF-α-induced increase in the p-p65/p65 ratio.In addition,the effect of CBX4 overexpression in NP cells is suppressed by NF-κB agonist.In summary,our results indicate that CBX4 overexpression can suppress TNF-α-induced matrix catabolism and cell senescence in the NP by inhibiting NF-κB activation.This study may provide new approaches for preventing and treating IDD.Yangyang Zhang Shuangxing Li Junmin Hong Jiansen Yan Zhengqi Huang Jiajun Wu Zhihuai Deng Tianyu Qin Kang Xu Wei Ye 2022Acta Biochimica et Biophysica Sinica2022,54,7:2
16Antifouling mechanism of natural product-based coatings investigated by digital holographic microscopy显示文摘Using natural product-based antifouling coatings has proven to be an effective strategy to combat biofouling.However,their antifouling mechanisms are still unclear.In this study,the antifouling mechanism of natural product-based coatings consisting of bio-sourced poly(lactic acid)-based polyurethane and ecofriendly antifoulant(butenolide)derived from marine bacteria was revealed by observing 3D bacterial motions utilizing a 3D tracking technique-digital holographic microscopy(DHM).As butenolide content increases,the density of planktonic marine bacteria(Pseudomonas sp.)near the surface decreases and thus leads to a reduced adhesion,indicating that butenolide elicits the adaptive response of Pseudomonas sp.to escape from the surface.Meanwhile,among these remained cells,an increased percentage is found to undergo subdiffusive motions compared with the case of smaller dose of butenolide.Further experiments show that butenolide can accelerate their swimming velocity and reduce flick frequency.Antibacterial assay confirms that butenolide-based coating shows high efficacy of antifouling performance against Pseudomonas sp.but without killing them like 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one(DCOIT).Jiansen Pan Qingmei Peng Guoliang Zhang Qingyi Xie Xiangjun Gong Pei-Yuan Qian Chunfeng Ma Guangzhao Zhang 2021Journal of Materials Science & Technology2021,,25:2
17Performance of mortar and concrete made with a fine aggregate of desert sand显示文摘ZHANG Gubxue SONG Jianxia YANG Jiansen 2006Building and Environment2006,41,1:1
18Enhanced thermoelectric performance in three-dimensional superlattice of topological insulator thin films显示文摘Fan Zheyong Zheng Jiansen Wang Huiqiong 2012Nanoscale Research Letters2012,7,1:1
19Performance-based design and seismic reliability analysis using designed experiments and neural networks 显示文摘Jiansen Zhang Ricardo O 2004Probabilistic Engineering Mechanics2004,19,3:1
20Performance of mortar and concrete made with a fine aggregate of desert sand显示文摘Zhang Guoxue Song Jianxia Yang Jiansen etc 2006Building and Environment2006,41,11:1
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