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Space advanced technology demonstration satellite

Science China(Technological Sciences) 2024年第1期67卷 240-258页

作者： ZHANG XiaoFeng CHEN Wen ZHU XiaoCheng MENG Na HE JunWang BI XingZi ZHANG YongHe SHI Qi LI Fei LIU Rui FENG ZhengGong LIU Liu LI JinSong WU HaiChen xu dongxiao LI TaiJie HUANG JiangJiang LIU Shuo LI TianTong YU XianSheng GAO Yang ZHOU Heng BAN HanYu ZHANG YanLi ZHANG YueTing YANG YingQuan HE Tao DUAN xuLiang CHEN Xin WANG YaMin SUN AnTai ZHANG KuoXiang SUN Ying WANG YaoBin FAN ChengCheng XIONG ShaoLin LI XinQiao WEN XiangYang LING ZhiXing SUN XiaoJin ZHANG Chen BAI XianYong WANG ZhanShan DENG YuanYong TIAN Hui YANG JianFeng xuE HongBo SANG Peng LIU JinGuo ZHENG HuiLong ZHU Xiang HE JianWu LI Hui xu LuXiang xu ShuYan CHEN WenWu LIU ZhenDong WANG ZhaoLi MAO XiangLong GAO Rong LI Zongxuan DING GuoPeng WANG XinYu DOU RunJiang WENG LuBin LUO Hao WANG YaPing LIANG XianFeng FANG ZiRuo Innovation Academy for Microsatellites Chinese Academy of SciencesShanghai 201203China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China National Astronomical Observatory of China Beijing 100101China Shanghai Institute of Technical Physics Chinese Academy of SciencesShanghai 200083China Institute of Precision Optical Engineering School of Physics Science and EngineeringTongji UniversityShanghai 200092China School of Earth and Space Sciences Peking UniversityBeijing 100871China Xi’an Institute of Optics and Precision Mechanics Chinese Academy of SciencesXi’an 710119China National Space Science Center Chinese Academy of SciencesBeijing 100190China Shenyang Institute of Automation Chinese Academy of SciencesShenyang 110016China Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100190China Institute of Mechanics Chinese Academy of SciencesBeijing 100190China Shanghai Institute of Organic Chemistry Chinese Academy of SciencesShanghai 200032China Hangzhou Institute for Advanced Study University of Chinese Academy of SciencesHangzhou 310024China Nanyang Technological University Singapore 569830Singapore Dalian Institute of Chemical Physics Chinese Academy of SciencesDalian 116023China Technical Institute of Physics and Chemistry Chinese Academy of SciencesBeijing 100049China Changchun Institute of Optics Fine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China Institute of Semiconductors Chinese Academy of SciencesBeijing 100083China Institute of Automation Chinese Academy of SciencesBeijing 100190China School of Aeronautics and Astronautics Zhejiang UniversityHangzhou 310058China

The Space Advanced Technology demonstration satellite(SATech-01),a mission for low-cost space science and new technology experiments,organized by Chinese Academy of Sciences(CAS),was successfully launched into a Sun-synchronous orbit at an altitude of~500 km on July 27,2022,from the Jiuquan Satellite Launch *** as an experimental platform for space science exploration and the demonstration of advanced common technologies in orbit,SATech-01 is equipped with 16 experimental payloads,including the solar upper transition region imager(SUTRI),the lobster eye imager for astronomy(LEIA),the high energy burst searcher(HEBS),and a High Precision Magnetic Field Measurement System based on a CPT Magnetometer(CPT).It also incorporates an imager with freeform optics,an integrated thermal imaging sensor,and a multi-functional integrated imager,*** paper provides an overview of SATech-01,including a technical description of the satellite and its scientific payloads,along with their on-orbit performance.

关键词： SATech-01 spacecraft design scientific instruments on-orbit performance

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Discovery of Partial Differential Equations from Highly Noisy and Sparse Data with Physics-Informed Information Criterion

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Research 2024年第1期2023卷 247-259页

作者： Hao xu Junsheng Zeng dongxiao Zhang BIC-ESAT EREand SKLTCSCollege of EngineeringPeking UniversityBeijing 100871P.R.China Institute of Applied Physics and Computational Mathematics Beijing 100088P.R.China Eastern Institute for Advanced Study Eastern Institute of TechnologyNingbo 315200ZhejiangP.R.China National Center for Applied Mathematics Shenzhen(NCAMS) Southern University of Science and TechnologyShenzhen 518055GuangdongP.R.China Department of Mathematics and Theories Peng Cheng LaboratoryShenzhen 518000GuangdongP.R.China

Data-driven discovery of partial differential equations(PDEs)has recently made tremendous progress,and many canonical PDEs have been discovered successfully for proof of ***,determining the most proper PDE without prior references remains challenging in terms of practical *** this work,a physics-informed information criterion(PIC)is proposed to measure the parsimony and precision of the discovered PDE *** proposed PIC achieves satisfactory robustness to highly noisy and sparse data on 7 canonical PDEs from different physical scenes,which confirms its ability to handle difficult *** PIC is also employed to discover unrevealed macroscale governing equations from microscopic simulation data in an actual physical *** results show that the discovered macroscale PDE is precise and parsimonious and satisfies underlying symmetries,which facilitates understanding and simulation of the physical *** proposition of the PIC enables practical applications of PDE discovery in discovering unrevealed governing equations in broader physical scenes.

关键词： process canonical proof

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Effects of Trace Cl^(-),Cu^(2+)and Fe^(3+) Ions on the Corrosion Behaviour of AA6063 in Ethylene Glycol and Water Solutions

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Acta Metallurgica Sinica(English Letters) 2022年第2期35卷 285-303页

作者： Lei Fan Juantao Zhang Hao Wang Yang Liu Yu Cui Cheng Wang Rui Liu dongxiao xu State Key Laboratory for Performance and Structure Safety of Petroleum Tubular Goods and Equipment Materials CNPC Tubular Goods Research InstituteXi’an 710077China NO.1 Gas Production Plant of Changqing Oilfield Company Jingbian 718500China Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Shenyang National Laboratory for Materials Science School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China

The effects of Cl^(-),Cu^(2+)and Fe^(3+)ions and their combinations on the corrosion behaviour of aluminium alloy 6063(AA6063)in ethylene glycol and water solutions at 50°C were investigated by electrochemical and immersion ***^(-)resulted in pitting corrosion of the *** the Cl^(-)-free solutions,Fe^(3+)was prone to accelerate uniform corrosion,while Cu^(2+)tended to accelerate pitting *** pitting corrosion of AA6063 was observed in the cases of Cl^(-)combined with Cu^(2+)or Fe^(3+),especially in the case of Cl^(-)combined with Cu^(2+)and Fe^(3+)ions.

关键词： Aluminium Polarization Weight loss Pitting corrosion

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F-MSAP:A practical system to detect methylation in chicken genome

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Chinese Science Bulletin 2005年第18期50卷 2039-2044页

作者： xu Qing SUN dongxiao ZHANG Yuan College of Animal Science and Technology China Agricultural University Beijing 100094 China

By replacing radiation with fluorescent system in the technique of methylation sensitive amplified polymor-phism (MSAP) and optimizing reaction conditions, a modi-fied technique to detect DNA methylation called F-MSAP (fluorescent labeled methylation sensitive amplified poly-morphism) was developed. In the present study, cytosine methylation patterns of genomic DNA were investigated in two inbred chickens and their F1 hybrids. Three types of methylation patterns were observed in each individual, namely fully methylated, hemi-methylated or not methylated types. The average incidence of methylation was approxi-mately 40%. The percentage that the F1 hybrid individual inherits the methylation for any given sites from either/both parent amounted to 95%, while the percentage of altered methylation patterns in F1 individual was only 5%, including 14 increased and 12 decreased methylation types, demon-strating that F-MSAP was highly efficient for large-scale detection of cytosine methylation in chicken genome. Our technique can be further extended to other animals or plants with complex genome and rich in methylation polymor-phism.

关键词：小鸡基因组多态现象 DNA 甲基化物荧光性

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The in vitro digestion fates of diacylglycerol under different intestinal conditions:a potential lipid source for lipid indigestion patients

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Food Science and Human Wellness 2024年第2期13卷 1079-1092页

作者： Qingqing xu Weifei Wang dongxiao Sun-Waterhouse Qian Zou Menglei Yan xuan Liu Dongming Lan Yonghua Wang School of Food Science and Engineering South China University of TechnologyGuangzhou 510640China Sericultural and Agri-Food Research Institute Guangdong Academy of Agricultural SciencesGuangzhou 510610China School of Chemical Sciences The University of AucklandPrivate Bag 92019New Zealand Guangdong Youmei Institute of Intelligent Bio-manufacturing Co. Ltd.Foshan 528200China

The in vitro digestion models mimicking the gastrointestinal(GI)tract of general population and lipid indigestion patients(with lower levels of bile salts or pancreatic lipase)were selected to investigate whether diacylglycerols(DAGs)are potential good lipid sources for these *** oil-based DAG(LD)and linseed oil(LT)were ***-based emulsion((83.74±1.23)%)had higher lipolysis degree than LT-based emulsion((74.47±1.16)%)when monitoring the GI tract of normal population as previously *** conditions seriously decreased the digestive degree of LT-based emulsion((40.23±2.48)%-(66.50±3.70)%)while showed less influence on LD-based emulsion((64.18±2.41)%-(81.85±3.45)%).As opposed to LT-based emulsion,LD-based emulsion exhibited preference for releasing unsaturated fatty acids(especially oleic acid andα-linolenic acid)due to their different glycerolipid ***-based emulsion showed potential for providing lipids and nutrients(including essential fatty acids)for lipid indigestion patients.

关键词： Diacylglycerol In vitro digestion Lipolysis level Cholestatic Exocrine pancreatic insufficiency

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Oblique-mode breakdown in hypersonic and high-enthalpy boundary layers over a blunt cone

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Advances in Aerodynamics 2021年第1期3卷 413-427页

作者： Xianliang Chen dongxiao xu Song Fu School of Aerospace Engineering Tsinghua University100084 BeijingChina

The nonlinear analyses of the hypersonic and high-enthalpy boundary-layer transition had received little attention compared with the widely-studied linear *** this work,the oblique-mode breakdown,as one of the most available transition mechanisms,is studied using the nonlinear parabolized stability equations(NPSE)with consideration of the thermal-chemical non-equilibrium *** flow over a blunt cone is computed at a free-stream Mach-number of *** rope-like structures and the spontaneous radiation of sound waves are observed in the schlieren-like *** is also illustrated that the disturbances of the species mass and vibrational temperature near the wall are mainly generated by the product term of the wall-normal velocity disturbance and the mean-flow *** comparison to the CPG flow,the TCNE effects destabilize the second mode and push upstream the N factor *** higher growth rate of the oblique wave leads to stronger growth of the streamwise vortices and harmonic waves.

关键词： Boundary-layer transition Hypersonics High-enthalpy flows

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Sesamin is an effective spleen tyrosine kinase inhibitor against IgE-mediated food allergy in computational， cell-based and animal studies

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Food Science and Human Wellness 2024年

作者： Yu Li xuerui Chen Longhua xu Xintong Tan Dapeng Li dongxiao Sun-Waterhouse Feng Li School of Chemical Sciences The University of Auckland Key Laboratory of Food Nutrition and Human Health in Universities of Shandong College of Food Science and Engineering Shandong Agricultural University

Food allergy has become a global concern. Spleen tyrosine kinase (SYK) inhibitors are promising therapeutics against allergic disorders. In this study， a total of 300 natural phenolic compounds were firstly subjected to virtual screening. Sesamin and its metabolites， sesamin monocatechol (SC-1) and sesamin dicatechol (SC-2)， were identified as potential SYK inhibitors， showing high binding affinity and inhibition efficiency towards SYK. Compared with R406 (a traditional SYK inhibitor)， sesamin， SC-1， and SC-2 had lower binding energy and inhibition constant (Ki) during molecular docking， exhibited higher bioavailability， safety， metabolism/clearance rate， and distribution uniformity ADMET predictions， and showed high stability in occupying the ATP-binding pocket of SYK during molecular dynamics simulations. In anti-dinitrophenyl-immunoglobulin E (Anti-DNP-IgE)/dinitrophenyl-human serum albumin (DNP-HSA)-stimulated rat basophilic leukemia (RBL-2H3) cells， sesamin in the concentration range of (5 – 80) μmol/L influenced significantly the degranulation and cytokine release， with 54.00% inhibition against β-hexosaminidase release and 58.45% decrease in histamine. In BALB/c mice， sesamin could ameliorate Anti-DNP-IgE/DNP-HSA-induced passive cutaneous anaphylaxis and ovalbumin (OVA)-induced active systemic anaphylaxis reactions， reduce the levels of allergic mediators (immunoglobulins and pro-inflammatory cytokines)， partially correct the imbalance of T helper (Th) cells differentiation in the spleen， and inhibit the phosphorylation of SYK and its downstream signaling proteins， including p38 mitogen-activated protein kinases (p38 MAPK)， extracellular signal-regulated kinases (ERK)， and p65 nuclear factor-κB (p65 NF-κB) in the spleen. Thus， sesamin may be a safe and versatile SYK inhibitor that can alleviate IgE-mediated food allergies.

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Integrative analysis of tumor stemness and immune microenvironment deciphers novel molecular subtypes in hepatocellular carcinoma

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Genes & Diseases 2024年第5期11卷 81-84页

作者： Zhiyi Wang Shuang Chen dongxiao Li Hui xu Siyuan Weng Yuyuan Zhang Yuqing Ren Chunguang Guo Xiuling Li Zaoqu Liu Xinwei Han Department of Interventional Radiology The First Affiliated Hospital of Zhengzhou UniversityZhengzhouHenan 450052China Department of Gastroenterology Henan Provincial People’s HospitalZhengzhou University People’s HospitalZhengzhouHenan 450004China Center of Reproductive Medicine The First Affiliated Hospital of Zhengzhou UniversityZhengzhouHenan 450052China Department of Respiratory and Critical Care Medicine The First Affiliated Hospital of Zhengzhou UniversityZhengzhouHenan 450052China Department of Endovascular Surgery The First Affiliated Hospital of Zhengzhou UniversityZhengzhouHenan 450052China State Key Laboratory of Proteomics Beijing Proteome Research CenterNational Center for Protein Sciences(Beijing)Beijing Institute of LifeomicsBeijing 102206China State Key Laboratory of Medical Molecular Biology Institute of Basic Medical SciencesChinese Academy of Medical SciencesDepartment of PathophysiologyPeking Union Medical CollegeBeijing 100730China

Hepatocellular carcinoma(HCC)is a highly heterogeneous tumor,with dynamic equilibrium and complex interplay between its intricate tumor nature and ambient tumor immune microenvironment(TIME).1 Elegant research has indicated that cancer stem cells,a small subset of neoplastic cells confined within dedicated niches,display stem cell-like properties and interact with cells in TIME,thereby imparting an indelible impact on stemness regulation,tumor heterogeneity,and cancer cell plasticity.2 Previous taxonomies solely from the perspective of stemness or TIME may introduce some degree of bias in the comprehension of HCC carcinogenesis,3,4 and thus it is of paramount importance to systematically consider tumor stemness and TIME as a whole to truly portray the biological landscape of HCC.

关键词： thereby landscape stem

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Riverine sulfate sources and behaviors in arid environment,Northwest China:Constraints from sulfur and oxygen isotopes

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Journal of Environmental Sciences 2024年第3期137卷 716-731页

作者： Yifu xu Wenjing Liu Bing xu Zhifang xu Key Laboratory of Cenozoic Geology and Environment Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Innovation Academy for Earth Science Chinese Academy of SciencesBeijing 100029China University of Chinese Academy of Sciences Beijing 100049China

The fate of riverine sulfate ion (SO_(4)^(2-)) and its environmental effects in arid environment are difficult to evaluate due to its complicated sources and strongly coupled behaviors with water cycle which is significantly modified by *** understand the sulfur cycle in aquatic systems in arid environment,the chemical and sulfur and oxygen isotopic compositions (δ^(34)S_(SO4)and δ^(18)O_(SO4)) of major rivers around the Badain Jaran Desert,northwestern China,were *** rivers had averaged SO_(4)^(2-)content at 1336μmol/L,over 10times higher than the global *** δ^(34)S_(SO4)and δ^(18)O_(SO4)values ranged from-5.3‰to+11.8‰and+1.6‰to+12.8‰,*** end-member analysis and the inverse model showed that riverine sulfate was mainly derived from evaporites dissolution (0-87%),sulfide oxidation (13%-100%) and precipitation (0-33%),indicating heterogeneity in sulfur sources and behaviors along the river drainage with the lithology variations and climate *** isotopic tools combining with hydro-chemistry compositions could be applied to reveal sulfur cycle in arid *** on the calculation,sulfide oxidation plays the primary role in the headwater and upstream in the Qilian-Mountains area,where sulfide is widely *** the proportion of evaporites dissolution contributing to riverine sulfate is much higher in downstream in a drier ***,less precipitation and higher temperature can lead to more intensive evaporation,affecting the process of sulfide oxidation and enhancing the rates of evaporites dissolution and sulfate precipitation in the basin.

关键词： Sulfur and oxygen isotopes Source apportionment Inverse model Arid environment Inland rivers Northwestern China

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Aldehyde oxidase mediated enantioselective metabolic health risk of dinotefuran

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Science China Chemistry 2024年第6期67卷 2079-2091页

作者： Liwei xu Xinxin xu Hua Kuang Chuanlai xu Xiaoling Wu State Key Laboratory of Food Science and Resources Jiangnan UniversityWuxi214122China International Joint Research Laboratory for Biointerface and Biodetection and School of Food Science and Technology Jiangnan UniversityWuxi214122China Collaborative Innovation center of Food Safety and Quality Control in Jiangsu Province Jiangnan UniversityWuxi214122China

Chiral pollutants often pose significant differential environmental health *** this study,the biotransformation of chiral dinotefuran(DIN)and its enantioselective metabolic toxicity mechanisms have been systemically ***,reversedphase chromatography-high resolution mass spectrometry was developed to quantify the content of DIN R/S chiral enantiomer with pg level sensitivity,revealing a lower elimination rate constant(K_(e))of S-DIN(0.730 h^(-1))than R-DIN(0.746 h^(-1)).Secondly,the interaction mechanism between DIN metabolism and important endogenous bioactive molecules,such as aldehyde oxidase(AOX)and neurotransmitters,was *** DIN nitro-group was converted into a guanidine group by the reducing site of nearby flavin adenine dinucleotide(FAD)in AOX with the preferred higher affinity of ***,the endogenous tryptophan(Trp)aldehyde metabolic intermediate,5-hydroxyindoleacetaldehyde(5-HIAL),provides a persistent electron donor for DIN reduction via the oxidation-catalyzed site in AOX,resulting in remarkable up-regulation of monoamine neurotransmitters such as serotonin and ***,the higher level of neurotransmitters further mediated dysregulation of oxylipin homeostasis via the serotonergic pathway,where S-DIN exhibited more pronounced liver lipid damage and environmental health risk with the accumulated lipid biomarkers,oxidized triglyceride(OxTG)and oxidized sphingomyelin(OxSM).This study elucidates the AOX-mediated enantioselectivity metabolic pathway of DIN,providing a new analytical method for chiral pollutants and paves the way for their health risk assessments.

关键词： neonicotinoid dinotefuran enantiomer aldehyde oxidase metabolomics health risk

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