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| 1 | Combining sap flow measurement-based canopy stomatal conductance and ^(13)C discrimination to estimate forest carbon assimilation显示文摘The available methods for studying C uptake of forest and their problems in practices are reviewed, and a new approach to combining sap flow and 13C techniques is proposed in this paper. This approach, obtained through strict mathematic derivation, combines sap flow measure-ment-based canopy stomatal conductance and 13C discrimi-nation to estimate instantaneous carbon assimilation rate of a forest. Namely the mean canopy stomatal conductance (gc) acquired from accurate measurement of sap flux density is integrated with the relationship between 13C discrimination (?) and Ci/Ca (intercellular/ambient CO2 concentrations) and with that between Anet (net photosynthetic rate) and gCO2 (stomatal conductance for CO2) so that a new relation be-tween forest C uptake and ? as well as gc is established. It is a new method of such kind for studying the C exchange be-tween forest and atmosphere based on experimental ecology. | ZHAO Ping LU Ping MA Ling SUN Guchou RAO Xingquan CAI Xi'an ZENG Xiaoping | 2005 | Chinese Science Bulletin2005，50，18： | 9 |
| 2 | MiRNA-203 suppresses tumor cell proliferation, migration and invasion by targeting Slug in gastric cancer显示文摘 | Liuqing Yang Hongwei Liang Yanbo Wang Shanting Gao Kai Yin Zhijian Liu Xi Zheng Ying Lv Lei Wang Chen-Yu Zhang Xi Chen Guifang Xu Weijie Zhang Xiaoping Zou | 2016 | Protein & Cell2016，7，5： | 7 |
| 3 | Fe5C2 nanoparticles as low-cost HER electrocatalyst:the importance of Co substitution显示文摘Constructing and understanding the doping effect of secondary metal in transition metal carbide(TMC)catalysts is pivotal for the design of low-cost hydrogen evolution reaction(HER) electrocatalysts. In this work, we developed a wet-chemistry strategy for synthesizing Co-modified Fe_5C_2 nanoparticles((Fe_(1-x)Cox)_5C_2 NPs) as highly active HER electrocatalysts in basic solution. The structure of(Fe_(1-x)Cox)_5C_2 NPs was characterized by X-ray diffraction(XRD), extended X-ray absorption fine structure spectra(EXAFS) and scanning/transmission electron microscopy(S/TEM), indicating that the isomorphous substitution of cobalt in the lattice of Fe_5C_2.(Fe_(0.75) Co_(0.25))_5C_2 exhibited the best HER activity(174 mV for j = -10 mA/cm^2). Computational calculation results indicate that Co provides the most active site for HER. X-ray adsorption spectra(XAS) studies further suggested that the electron transfer in Fe–C bonds are enhanced by the substitution of Co, which modulates the hydrogen adsorption on the adjacent electronic-enriched carbon, and therefore promotes HER activity. Our results affirm the design of lowcost bimetallic TMCs based HER catalysts. | Siwei Li Pengju Ren Ce Yang Xi Liu Zhen Yin Weizhen Li Hanjun Yang Jian Li Xiaoping Wang Yi Wang Ruochen Cao Lili Lin Siyu Yao Xiaodong Wen Ding Ma | 2018 | Science Bulletin2018，63，20： | 6 |
| 4 | Changes in sea ice kinematics in the Arctic outflow region and their associations with Arctic Northeast Passage accessibility显示文摘Amplification of climate warming in the Arctic is causing a dramatic retreat of sea ice, which means the Arctic sea routes are becoming increasingly accessible. This study used a satellite-derived sea ice motion product to quantify the kinematic features of sea ice in the Arctic outflow region which specially referred to the Fram Strait and to the north of the Northeast Passage(NEP). An observed trend of increased southward sea ice displacement from the central Arctic to the Fram Strait indicated enhancement of the Transpolar Drift Stream(TDS). In the regions to the north of the NEP, the long-term trend of northward sea ice speed in the Kara sector was +0.04 cm/s per year in spring. A significant statistical relationship was found between the NEP open period and the northward speed of the sea ice to the north of the NEP. The offshore advection of sea ice could account for the opening of sea routes by 33% and 15% in the Kara and Laptev sectors, respectively. The difference in sea level pressure across the TDS,i.e., the Central Arctic Index(CAI), presented more significant correlation than for the Arctic atmospheric Dipole Anomaly index with the open period of the NEP, and the CAI could explain the southward displacement of sea ice toward the Fram Strait by more than 45%. The impact from the summer positive CAI reinforces the thinning and mechanical weakening of the sea ice in the NEP region, which improves the navigability of the NEP. | Dawei Gui Xiaoping Pang Ruibo Lei Xi Zhao Jia Wang | 2019 | Acta Oceanologica Sinica2019，38，8： | 5 |
| 5 | Per os infectivity factors:a complicated and evolutionarily conserved entry machinery of baculovirus显示文摘Baculoviruses are a family of arthropod-specific large DNA viruses that infect insect species belonging to the orders Lepidoptera,Hymenoptera and Diptera.In nature,occlusion-derived viruses(ODVs) initiate baculovirus primary infection in the midgut epithelium of insect hosts,and this process is largely dependent on a number of ODV envelope proteins designated as per os infectivity factors(PIFs).Interestingly,PIF homologs are also present in other invertebrate large DNA viruses,which is indicative that per os infection is an ancient and phylogenetically conserved entry mechanism shared by these viruses.Here,we review the advances in the knowledge of the functions of individual PIFs and recent discoveries about the PIF complex,and discuss the evolutionary implications of PIF homologs in invertebrate DNA viruses.Furthermore,future research highlights on the per os infection mechanism are also prospected. | Xi Wang Xiaoping Liu George Alliwa Makalliwa Jiang Li Hualin Wang Zhihong Hu Manli Wang | 2017 | Science China(Life Sciences)2017，60，8： | 4 |
| 6 | Experimental and numerical investigations of scale-up effects on the hydrodynamics of slurry bubble columns显示文摘Experiments and simulations were conducted for bubble columns with diameter of 0.2 m(180 mm i.d.), 0.5 m(476 mm i.d.) and 0.8 m(760 mm i.d.) at high superficial gas velocities(0.12–0.62 m·s-1) and high solid concentrations(0–30 vol%). Radial profiles of time-averaged gas holdup, axial liquid velocity, and turbulent kinetic energy were measured by using in-house developed conductivity probes and Pavlov tubes. Effects of column diameter, superficial gas velocity, and solid concentration were investigated in a wide range of operating conditions. Experimental results indicated that the average gas holdup remarkably increases with superficial gas velocity, and the radial profiles of investigated flow properties become steeper at high superficial gas velocities. The axial liquid velocities significantly increase with the growth of the column size, whereas the gas holdup was slightly affected. The presence of solid in bubble columns would inhibit the breakage of bubbles, which results in an increase in bubble rise velocity and a decrease in gas holdup, but time-averaged axial liquid velocities remain almost the same as that of the hollow column. Furthermore, a 2-D axisymmetric k–ε model was used to simulate heterogeneous bubbly flow using commercial code FLUENT 6.2. The lateral lift force and the turbulent diffusion force were introduced for the determination of gas holdup profiles and the effects of solid concentration were considered as the variation of average bubble diameter in the model. Results predicted by the CFD simulation showed good agreement with experimental data. | Zhaoqi Li Xiaoping Guan Lijun Wang Youwei Cheng Xi Li | 2016 | Chinese Journal of Chemical Engineering2016，24，8： | 4 |
| 7 | Selective catalytic hydrogenation of naphthalene to tetralin over a NiMo/Al2O3 catalyst显示文摘The selective catalytic hydrogenation of naphthalene to high-value tetralin was systematically investigated.A series of Al2O3 catalysts containing different active metals(Co,Mo,Ni,W)were prepared by incipient wetness impregnation.The effects of different active metals forms(oxidation,reduction,sulfuration)and reaction conditions on naphthalene hydrogenation were investigated and the catalysts were characterized by XRD,XPS,BET,NH3-TPD and SEM.Especially,Ni-Mo/Al2O3 was first used in this reactive system.The results show that the oxidative4%Ni O-20%MoO3/Al2O3 is the best catalyst for the preparation of tetralin.The conversion of naphthalene and the selectivity of tetralin can reach 95.62%and 99.75%respectively at 200℃,8 h and 6 MPa.Compared with reduced and sulfureted 4%Ni O-20%MoO3/Al2O3 catalysts,oxidative 4%Ni O-20%MoO3/Al2O3 has a well dispersed and uniform monolayer of the active metals,larger pore volume and size,and larger total acidity.NiO-MoO3/Al2O3 has a synergistic effect between NiO activity and MoO3 selectivity. | Xiaoping Su Pu An Junwen Gao RuchengWang Yujuan Zhang Xi Li Yangkun Zhao Yongqi Liu Xiaoxun Ma Ming Sun | 2020 | Chinese Journal of Chemical Engineering2020，28，10： | 4 |
| 8 | Unification and Harmonization in True Color Image City Map显示文摘True color image city map is a sort of new-style map which combines the high resolution image and map symbols and shows both advantages in visualization. At the same time, the map unification and harmonization should be taken into account dur-ing the design process, since some visual conflicts appear when map symbols overlaid on the true color image. The objective of this research is to explore the rules in the process of true color image city map design based on chromatic and aesthetic knowledge. At the end, taking the Image Atlas of Guangzhou as an example, image color adjustment, road network presentation, and symbol de-signing issues will be discussed in the application. | ZHAO Xi PANG Xiaoping ZHANG Shengli ZHANG Xiang | 2007 | Geo-Spatial Information Science2007，10，1： | 3 |
| 9 | PrP mutants with different numbers of octarepeat sequences are more susceptible to the oxidative stress显示文摘One of the physiological functions of cellular prion protein(PrP C )is believed to work as a cellular resistance to oxidative stress,in which the octarepeats region within PrP plays an important role.However,the detailed mechanism is less clear.In this study,the expressing plasmids of wild-type PrP (PrP-PG5)and various PrP mutants containing 0(PrP-PG0),9(PrP-PG9)and 12(PrP-PG12)octarepeats were generated and PrP proteins were expressed both in E.coli and in mammalian cells.Protein aggregation and formation of carbonyl groups were clearly seen in the recombinant PrPs expressed from E.coli after treatment of H2O2.MTT and trypan blue staining assays revealed that the cells expressing the mutated PrPs within octarepeats are less viable than the cells expressing wild-type PrP.Statistically significant high levels of intracellular free radicals and low levels of glutathione peroxidase were observed in the cells transfected with plasmids containing deleted or inserted octarepeats.Remarkably more productions of carbonyl groups were detected in the cells expressing PrPs with deleted and inserted octarepeats after exposing to H2O2.Furthermore,cells expressing wild-type PrP showed stronger resistant activity to the challenge of H2O2 at certain extent than the mutated PrPs and mock. These data provided the evidences that the octarepeats number within PrP is critical for maintaining its activity of antioxidation.Loss of its protective function against oxidative stress may be one of the possible pathways for the mutated PrPs to involve in the pathogenesis of familial Creutzfeldt-Jacob diseases. | AN Run1 ,2,DONG ChenFang 2,LEI YanJun 1,2,HAN Lu 2,LI Ping 2,CHEN JianMing 2,WANG GuiRong 2, SHI Qi 2 ,GAO Chen 2 ,JIANG HuiYing 2 ,ZHOU Wei 2 ,HAN Jun 2 ,CHU YongLie 1 ,DONG XiaoPing 2 1School of Medicine,Xi’an JiaoTong University,Xi’an 710061,China 2State Key Laboratory for Infectious Disease Prevention and Control,National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention,YingXin Rd 100,Beijing 100052,China | 2008 | Science China(Life Sciences)2008，51，7： | 3 |
| 10 | Interaction of hsa-miR-381 and glioma suppressor LRRC4 is involved in glioma growth显示文摘 | Hailin Tang Xiaoping Liu Zeyou Wang Xiaoling She Xi Zeng Min Deng Qianjin Liao Xiaofang Guo Rong Wang Xiaoling Li Fang Zeng Minghua Wu Guiyuan Li | 2011 | Brain Research2011，，： | 1 |
| 11 | Reproductive success of the crested ibis Nipponia Nippon显示文摘 | YU Xiaoping LIU Naifa XI Yongmei | | 0，，04： | 1 |
| 12 | MicroRNA-361-5p facilitates cervical cancer progression through mediation of epithelial-to-mesenchymal transition显示文摘 | Xiaomei Wu Xiaowei Xi Qin Yan Zhenbo Zhang Bin Cai Wen Lu Xiaoping Wan | 2013 | Medical Oncology2013，，4： | 1 |
| 13 | EFFECT OF Nb ADDITION ON MICROSTRUCTURE OF(Nd,Dy)-(Fe,Co)-B MAGNETS显示文摘An addition of Nb up to 2 at.-% into(Nd,Dy)-(Fe,Co)-B alloy causes the formation ofdendrite Fe2Nb and the precipitates in hard magnetic grains.Both increases withincreasing Nb content.During sintering,part of Fe2Nb dissolves within the 2:14:1 grains,and the Fe2Nb along grain boundaries hinders the growth of 2:14:1 grains.During an-nealing,the dissolved Nb in(?)-phase precipitates out,and this nearby the grain boundarydiffuses into Nd-rich phase to form new granular Fe2Nb and to increase the Nb contentin Nd-rich phase,this results in a precipitate-free zone in the(?)-grain near Nd-rich phase. | SONG Xiaoping WANG Xiaotian HUANG Qihua LIU Junhai YAO Yinliang Xi’an Jiaotong University,Xi’an,China | 1992 | Acta Metallurgica Sinica(English Letters)1992，5，8： | 1 |
| 14 | Expressionand function of PPAR'y in rat and human vascular smooth muscle cells 显示文摘 | RE Law S Goetze Xiaoping Xi | 2000 | Circulation2000，101，： | 1 |
| 15 | Pemxisome proliferator-acti- vated receptor activators target human eendothelial ceils to inhibit leukocyte-endothelial cell interaction 显示文摘 | Jackon S M Parhami F Xi Xiaoping | 1999 | Arterioscler Thromb Vasc Bi- ol1999，19，： | 1 |
| 16 | Daily sea ice concentration product based on brightness temperature data of FY-3D MWRI in the Arctic显示文摘A daily sea ice concentration(SIC)product in the Arctic,derived from the brightness temperature(TB)data of the Microwave Radiation Imager(MWRI)sensor aboard on the FY-3D satellite,is described in this paper.The MWRI TB raw swath data were first processed into daily gridded data and then corrected using the Advanced Microwave Scanning Radiometer 2(AMSR2)sensor.An ASI algorithm,which uses daily dynamic tie points,was adopted to calculate daily SIC at 12.5 km polar stereographic projection from January 2018 to June 2020.Our generated MWRI SIC product was compared with the AMSR2 SIC based on the ASI algorithm that uses fixed tie points.For more detailed comparison,we then compared our MWRI SIC with the SIC from the Moderate Resolution Imaging Spectroradiometer(MODIS)data.The mean bias between our MWRI SIC and AMSR2 SIC is 4.24%.The absolute values of biases between the daily MWRI SIC and MODIS SIC range from 0.14%to 10.76%,better than the MWRI SIC product based on the NT2 algorithm published by the Chinese National Satellite Meteorological Center.The results show that our MWRI SIC product has a good quality and can be used as a basic dataset for sea ice extent records.The dataset is available at http://gffzze4f4599d7a764a8fh5bbp60bqff9c6wu5.ffgz.tsg.suse.edu.cn/10.11922/sciencedb.00137. | Ying Chen Xi Zhao Xiaoping Pang Qing Ji | 2022 | Big Earth Data2022，6，2： | 1 |
| 17 | Effect of four organoehlorine pesticides on the reproduction of freshwater rotifer Brachionus calyciflorus pallas 显示文摘 | XI Yilong CHU Zhaoxia XU Xiaoping | 2007 | Environmental Toxicology and Chemistry2007，26，： | 1 |
| 18 | The mechanism underlying extrapulmonary complications of the coronavirus disease 2019 and its therapeutic implication显示文摘The coronavirus disease 2019(COVID-19)is a highly transmissible disease caused by the severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)that poses a major threat to global public health.Although COVID-19 primarily affects the respiratory system,causing severe pneumonia and acute respiratory distress syndrome in severe cases,it can also result in multiple extrapulmonary complications. | Qin Ning Di Wu Xiaojing Wang Dong Xi Tao Chen Guang Chen Hongwu Wang Huiling Lu Ming Wang Lin Zhu Junjian Hu Tingting Liu Ke Ma Meifang Han Xiaoping Luo | 2022 | Signal Transduction and Targeted Therapy2022，7，3： | 1 |
| 19 | Applications of Monitored Natural Attenuation in Contaminated Soil and Groundwater显示文摘Restoration of contaminated soil and groundwater could be divided into two phases. The first phase takes aim at reducing human being's health risks by active remediation,while the second phase aims at eliminating ecological risks by natural attenuation( NA). Because of cost-effective and sustainable cleanup,monitored natural attenuation( MNA) and enhanced natural attenuation( ENA) have been gaining more attention recently,especially in the respects of ecological risk-oriented contaminated land management and a follow-up measure after active remediation. The uses and procedures of MNA for contaminated site cleanup and remediation in USA and EU were introduced firstly,and then possible applications of MNA in China were suggested. More developments and practices of MNA and ENA for managing contaminated sites in China are expected. | Li Xiaoping Cheng Xi | 2014 | Meteorological and Environmental Research2014，5，5： | 1 |
| 20 | Study on Complexity-Reduced Iterative Equalization Algorithm for Mobile OFDM显示文摘 | XI Xiaoping ZHANG Can | 2009 | Chinese Journal of Electronics2009，18，1： | 1 |
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