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微型蒸发器口径影响土壤蒸发测量值的试验研究

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灌溉排水学报 2011年第1期30卷 1-4页

作者：高晓飞王晓岚北京师范大学地表过程与资源生态国家重点实验室北京100875 北京师范大学地理学与遥感科学学院北京100875

研究使用70、104、152和193 mm四种口径的微型蒸发器测定了室外裸土和室内裸土的土壤蒸发量。目的是考查蒸发器口径对土壤蒸发量测定值的影响。试验结果显示,在供水条件相同的情况下,70 mm口径微型蒸发器的测量值大于其他口径微型蒸发... 详细信息

研究使用70、104、152和193 mm四种口径的微型蒸发器测定了室外裸土和室内裸土的土壤蒸发量。目的是考查蒸发器口径对土壤蒸发量测定值的影响。试验结果显示,在供水条件相同的情况下,70 mm口径微型蒸发器的测量值大于其他口径微型蒸发器的测量值,但在遮阴(室内)条件下,口径的影响会降低。原因可能是70 mm口径微型蒸发器受外部环境干扰较大。其他3种微型蒸发器的观测值具有极显著的相关关系,数值上差异也较少。研究认为,微型蒸发器的口径一般应在104 mm以上,但在遮阴(室内)条件下,70 mm口径的蒸发器也是可以满足要求的。

关键词：微型蒸发器口径裸土蒸发

The International Order in 2023: Entering an “Era of Uncertainty”

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和平与发展 2024年第1期 210-216页

作者： gao fei Department of Diplomacy and Foreign Affairs Management

With the accelerated evolution of the global transformation unseen in a century,the year of 2023 came to an end amid turmoil and uncertainty in the *** crisis in Ukraine was not resolved,the Palestinian-Israeli conflict resumed,the world economy was in a downturn,and the restructuring of global industrial and supply chains was *** the“scar eff ect”of the COVID-19 pandemic,the world entered a new normal of political turmoil and economic *** change of the times and the transformation of the international system and order are the root causes of turbulence in the contemporary *** in the world do not want to go to a“new Cold War”,but it is diffi cult to return to the“old-day cooperation”.With the call for“cool war”and“cold peace”rising,the international order has entered an“era of uncertainty”.

关键词： peace return resume

In situ visualization of the cellular uptake and sub-cellular distribution of mussel oligosaccharides

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Journal of Pharmaceutical Analysis 2024年第6期14卷 840-850页

作者： Zhenjie Yu Huarong Shao Xintian Shao Linyan Yu Yanan gao Youxiao Ren fei Liu Caicai Meng Peixue Ling Qixin Chen Key Laboratory for Biotechnology Drugs of National Health Commission School of Pharmaceutical Sciences&Institute of Materia MedicaMedical Science and Technology Innovation CenterShandong First Medical University&Shandong Academy of Medical SciencesJinan250117China Key Laboratory of Biopharmaceuticals Engineering Laboratory of Polysaccharide DrugsNational-Local Joint Engineering Laboratory of Polysaccharide DrugsShandong Academy of Pharmaceutical ScienceJinan250101China Shenzhen Research Institute of Xiamen University ShenzhenGuangdong518057China School of Life Sciences Medical Science and Technology Innovation CenterShandong First Medical University&Shandong Academy of Medical SciencesJinan250117China Departments of Diagnostic Radiology SurgeryChemical and Biomolecular Engineeringand Biomedical EngineeringYong Loo Lin School of Medicine and Faculty of EngineeringNational University of SingaporeSingapore119074Singapore School of Pharmaceutical Sciences Shandong UniversityJinan250101China

Unlike chemosynthetic drugs designed for specific molecular and disease targets,active small-molecule natural products typically have a wide range of bioactivities and multiple targets,necessitating extensive screening and *** address this issue,we propose a strategy for the direct in situ microdynamic examination of potential drug candidates to rapidly identify their effects and mechanisms of *** a proof-of-concept,we investigated the behavior of mussel oligosaccharide(MOS-1)by tracking the subcellular dynamics of fluorescently labeled MOS-1 in cultured *** recorded the entire dynamic process of the localization of fluorescein isothiocyanate(FITC)-MOS-1 to the lysosomes and visualized the distribution of the drug within the ***,lysosomes containing FITC-MOS-1 actively recruited lipid droplets,leading to fusion events and increased cellular lipid *** drug behaviors confirmed MOS-1 is a candidate for the treatment of lipid-related ***,in a high-fat HepG2 cell model and in high-fat diet-fed apolipoprotein E(ApoE)^(-/-)mice,MOS-1 significantly promoted triglyceride degradation,reduced lipid droplet accumulation,lowered serum triglyceride levels,and mitigated liver damage and ***,our work supports the prioritization of in situ visual monitoring of drug location and distribution in subcellular compartments during the drug development phase,as this methodology contributes to the rapid identification of drug ***,this methodology is significant for the screening and development of selective small-molecule drugs,and is expected to expedite the identification of candidate molecules with medicinal effects.

关键词： Cellular imaging Fluorescence labeling Mussel oligosaccharide Lipid metabolism

Ultralow charge-discharge voltage gap of 0.05 V in sunlight-responsive neutral aqueous Zn-air battery

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Carbon Energy 2024年第9期6卷 172-183页

作者： Zhimin Niu Yan gao Tianhui Wu fei Zhang Ran Zhao Zijia Chen Yiming Yuan Tifeng Jiao Jianmin Gu Li Lu Desong Wang State Key Laboratory of Metastable Materials Science and Technology(MMST) Hebei Key Laboratory of Applied ChemistryYanshan UniversityQinhuangdaoChina Department of Mechanical Engineering National University of SingaporeSingaporeSingapore School of Sciences Hebei University of Science and TechnologyShijiazhuangChina

Rechargeable neutral aqueous zinc-air batteries(ZABs)are a promising type of energy storage device with longer operating life and less corrosiveness compared with conventional alkaline ***,the neutral ZABs normally possess poor oxygen evolution reactions(OERs)and oxygen reduction reactions performance,resulting in a large charge–discharge voltage gap and low round-trip ***,we demonstrate a sunlight-assisted strategy for achieving an ultralow voltage gap of 0.05 V in neutral ZABs by using the FeOOH-decorated BiVO4(Fe-BiVO4)as an oxygen *** sunlight,the electrons move from the valence band(VB)of Fe-BiVO_(4) to the conduction band producing holes in VB to promote the OER process and hence reduce the ***,the photopotential generated by the Fe-BiVO_(4) compensates a part of the charging potential of neutral ***,the energy loss of the battery could be compensated via solar energy,leading to a record-low gap of 0.05 V between the charge and discharge voltage with a high round-trip efficiency of 94%.This work offers a simple but efficient pathway for solar-energy utilization in storage devices,further guiding the design of high energy efficiency of neutral aqueous ZABs.

关键词： neutral ZABs oxygen catalytic reactions photocatalysis round-trip efficiency solar energy

Quantized anomalous Hall resistivity achieved in molecular beam epitaxy-grown Mn Bi2Te4 thin films

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National Science Review 2024年第2期11卷 24-32页

作者： Yunhe Bai Yuanzhao Li Jianli Luan Ruixuan Liu Wenyu Song Yang Chen Peng-fei Ji Qinghua Zhang Fanqi Meng Bingbing Tong Lin Li Yuying Jiang Zongwei gao Lin Gu Jinsong Zhang Yayu Wang Qi-Kun Xue Ke He Yang Feng xiao Feng State Key Laboratory of Low Dimensional Quantum Physics Department of Physics Tsinghua University Institute of Physics Chinese Academy of Sciences School of Materials Science and Engineering Tsinghua University Beijing Academy of Quantum Information Sciences Frontier Science Center for Quantum Information Hefei National Laboratory Southern University of Science and Technology

The intrinsic magnetic topological insulator MnBi2Te4provides a feasible pathway to the high-temperature quantum anomalous Hall（QAH） effect as well as various novel topological quantum phases. Although quantized transport properties have been observed in exfoliated MnBi2Te4thin flakes, it remains a big challenge to achieve molecular beam epitaxy（MBE）-grown MnBi2Te4thin films even close to the quantized regime. In this work, we report the realization of quantized anomalous Hall resistivity in MBE-grown MnBi2Te4thin films with the chemical potential tuned by both controlled in situ oxygen exposure and top gating. We find that elongated post-annealing obviously elevates the temperature to achieve quantization of the Hall resistivity, but also increases the residual longitudinal resistivity, indicating a picture of high-quality QAH puddles weakly coupled by tunnel barriers. These results help to clarify the puzzles in previous experimental studies on MnBi2Te4and to find a way out of the big difficulty in obtaining MnBi2Te4samples showing quantized transport properties.

关键词： intrinsic magnetic topological insulator quantized anomalous Hall resistivity molecular beam epitaxy quantized transport property

Ischemia-reperfusion injury:molecular mechanisms and therapeutic targets

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Signal Transduction and Targeted Therapy 2024年第2期9卷 558-596页

作者： Meng Zhang Qian Liu Hui Meng Hongxia Duan Xin Liu Jian Wu fei gao Shijun Wang Rubin Tan Jinxiang Yuan The Collaborative Innovation Center Jining Medical UniversityJiningShandong 272067China Clinical Medical College Jining Medical UniversityJiningShandong 272067China Second Clinical Medical College Jining Medical UniversityJiningShandong 272067China Shanghai Institute of Cardiovascular Diseases Zhongshan Hospital and Institutes of Biomedical SciencesFudan UniversityShanghaiChina Institute of Zoology Chinese Academy of SciencesBeijingChina Department of Physiology Basic medical schoolXuzhou Medical UniversityXuzhou 221004China

Ischemia-reperfusion(I/R)injury paradoxically occurs during reperfusion following ischemia,exacerbating the initial tissue *** limited understanding of the intricate mechanisms underlying I/R injury hinders the development of effective therapeutic *** Wnt signaling pathway exhibits extensive crosstalk with various other pathways,forming a network system of signaling pathways involved in I/R *** review article elucidates the underlying mechanisms involved in Wnt signaling,as well as the complex interplay between Wnt and other pathways,including Notch,phosphatidylinositol 3-kinase/protein kinase B,transforming growth factor-β,nuclear factor kappa,bone morphogenetic protein,N-methyl-D-aspartic acid receptor-Ca2+-Activin A,Hippo-Yes-associated protein,toll-like receptor 4/toll-interleukine-1 receptor domain-containing adapter-inducing interferon-β,and hepatocyte growth factor/mesenchymal-epithelial transition *** particular,we delve into their respective contributions to key pathological processes,including apoptosis,the inflammatory response,oxidative stress,extracellular matrix remodeling,angiogenesis,cell hypertrophy,fibrosis,ferroptosis,neurogenesis,and blood-brain barrier damage during I/R *** comprehensive analysis of the mechanisms involved in Wnt signaling during I/R reveals that activation of the canonical Wnt pathway promotes organ recovery,while activation of the non-canonical Wnt pathways exacerbates ***,we explore novel therapeutic approaches based on these mechanistic findings,incorporating evidence from animal experiments,current standards,and clinical *** objective of this review is to provide deeper insights into the roles of Wnt and its crosstalk signaling pathways in I/R-mediated processes and organ dysfunction,to facilitate the development of innovative therapeutic agents for I/R injury.

关键词： therapeutic reperfusion damage

SunScan冠层分析仪在测量大豆叶面积指数中的应用

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生态学杂志 2008年第5期27卷 862-866页

作者：刘刚谢云高晓飞段兴武北京师范大学地理学与遥感科学学院地表过程与资源生态国家重点实验室北京100875

SunScan冠层分析仪是一种利用间接测量法观测叶面积指数（LAI）的仪器，通过给定反映植被几何特征的椭球体叶倾角分布参数（ELADP），测量透射率获得LAI。于2005、2006年在黑龙江省嫩江县鹤山农场布设大豆试验地，通过比较LI-3100叶面... 详细信息

SunScan冠层分析仪是一种利用间接测量法观测叶面积指数（LAI）的仪器，通过给定反映植被几何特征的椭球体叶倾角分布参数（ELADP），测量透射率获得LAI。于2005、2006年在黑龙江省嫩江县鹤山农场布设大豆试验地，通过比较LI-3100叶面积仪直接测量的LAI和SunScan冠层分析仪间接测量的LAI，得出ELADP率定结果，并验证了SunScan冠层分析仪测量LAI的精度。结果表明：用SunScan测量大豆冠层LAI时，ELADP取值为4．0；设定该参数后，SunScan测量的LAI与LI-3100测量结果一致，二者拟合的线性回归方程显著；随生长季叶面积的变化，SunScan测量误差略有变化；播种后50～85d，Sun—Scan观测值偏低7．2％，播种96d以后观测值偏高12．5％，播种后85～96d与LI-3100观测值十分接近，误差只有2．0％；经过参数率定后的SunScan测量LAI效果较好。

关键词： SunScan冠层分析仪椭球体叶倾角分布参数叶面积指数大豆

Dynamic emission characteristics and control strategies of air pollutants from motor vehicles in downtown Beijing,China

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Journal of Environmental Sciences 2024年第2期136卷 637-646页

作者： Yan Shen Tongran Wu Aiping Lian Jie gao fei Peng Guohua Song Xuefang Wu Yangyang Cui Xinyu Liu Yunfei Wan Jing Yan Yifeng Xue National Engineering Research Center of Urban Environmental Pollution Control Beijing Municipal Research Institute of Eco-Environmental ProtectionBeijing 100037China Beijing Municipal Ecology and Environment Bureau Beijing 100048China Beijing Jiaotong University Beijing 100091China

This study combined the real-time monitoring and investigation of traffic flows to comprehensively analyze the road traffic flow and vehicle structure in downtown Beijing.A dynamic emission inventory of motor vehicle air pollutants in downtown Beijing in 2021 was established,and the impact of these emissions on air quality was simulated and quantified,and different emission reduction control scenarios were proposed to evaluate their environmental improvement effects and explore measures to mitigate the impact of pollution *** results show that the high traffic flow and the structure of the motor vehicle emissions in downtown Beijing are the main causes of severe motor vehicle *** data shows that traffic flow in central Beijing is dominated by small passenger vehicles,while the vehicle mix is better than in other regions,with 72.0%of vehicles meeting"National V"or higher emission ***,to achieve higher air quality goals,further reducing vehicle emissions is *** on dynamic traffic flow,the average daily emissions of nitrogen oxides(NOX),particulate matters(PM_(2.5))and volatile organic compounds(VOC)from motor vehicles in central Beijing are 17.7 tons,0.6 tons and 14.0 tons,respectively,accounting for 23.0%of the city’s average daily motor vehicle *** a zero-emission zone for motor vehicles were implemented in central Beijing,the annual average emission level of pollutants will be reduced by 10.4%to 21.0%.The designation of ultra-low emission zones for motor vehicles could be effective in improving the air quality in the center of Beijing.

关键词： Motor vehicle Air pollutant Emission characteristics Control strategy Beijing

Mitochondrial transplantation confers protection against the effects of ischemic stroke by repressing microglial pyroptosis and promoting neurogenesis

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Neural Regeneration Research 2024年第6期19卷 1325-1335页

作者： Li Sun Zhaoyan Zhao Jing Guo Yuan Qin Qian Yu xiaolong Shi fei Guo Haiqin Zhang Xude Sun Changjun gao Qian Yang Department of Experimental Surgery The Second Affiliated Hospital of Air Force Medical UniversityXi’anShaanxi ProvinceChina Department of Anesthesiology The Second Affiliated Hospital of Air Force Medical UniversityXi’anShaanxi ProvinceChina

Transferring healthy and functional mitochondria to the lateral ventricles confers neuroprotection in a rat model of ischemia-reperfusion *** mitochondrial transplantation is also beneficial in pediatric patients with cardiac ischemia-reperfusion ***,transplantation of functional exogenous mitochondria may be a promising therapeutic approach for ischemic *** explore the neuroprotective effect of mitochondria transplantation and determine the underlying mechanism in ischemic stroke,in this study we established a photo-thrombosis-induced mouse model of focal ischemia and administered freshly isolated mitochondria via the tail vein or to the injury site(in situ).Animal behavior tests,immunofluorescence staining,2,3,5-triphenyltetrazolium chloride(TTC)staining,mRNA-seq,and western blotting were used to assess mouse anxiety and memory,cortical infarct area,pyroptosis,and neurogenesis,*** bioinformatics analysis,western blotting,co-immunoprecipitation,and mass spectroscopy,we identified S100 calcium binding protein A9(S100A9)as a potential regulator of mitochondrial function and determined its possible interacting *** between exogenous and endogenous mitochondria,as well as the effect of exogenous mitochondria on recipient microglia,were assessed in *** data showed that:(1)mitochondrial transplantation markedly reduced mortality and improved emotional and cognitive function,as well as reducing infarct area,inhibiting pyroptosis,and promoting cortical neurogenesis;(2)microglial expression of S100A9 was markedly increased by ischemic injury and regulated mitochondrial function;(3)in vitro,exogenous mitochondria enhanced mitochondrial function,reduced redox stress,and regulated microglial polarization and pyroptosis by fusing with endogenous mitochondria;and(4)S100A9 promoted internalization of exogenous mitochondria by the microglia,thereby amplifying their pro-proliferation and anti-inflammatory ***

关键词： ischemic stroke microglia mitochondria transplantation neurogenesis pyroptosis