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Polymeric hollow fiber membrane for cooling crystallization seeding:On the mechanism of induced nucleation based on thermal transfer Author links open overlay panel

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Particuology 2024年第8期91卷 38-49页

作者： Zeman he Shaofu Du Guanying Shao Peiyu Li Lei Sheng Gaohong he Xiaobin Jiang Wu Xiao State Key Laboratory of Fine Chemicals School of Chemical EngineeringEngineering Laboratory for Petrochemical Energy-efficient Separation Technology of Liaoning ProvinceDalian University of TechnologyDalian 116024China

Cooling crystallization is an important separation process and particuology technology that requires accurate nucleation control ***,we introduced the polymeric hollow fiber membrane with proper thermal properties as the effective nucleation induction interface during cooling *** heterogeneous nucleation control mechanism was introduced based on classical nucleation theory and the thermal transfer *** properties and the thermal conductivity of two kinds of polymeric membranes,polytetrafluoroethylene(PTFE)and polyethersulfone(PES),were measured and simulated with the developed *** two membranes possessed different nucleation induction periods,nucleation rates and crystallization performances,which validated that the hollow fiber membrane module could effectively accelerate the nucleation process compared to conventional cooling crystallization owing to the shorter nucleation induction period and the reduced solution surface *** to the higher hydrophobicity and the lower roughness of the membrane surface,the PTFE membrane possessed a more moderate performance in generating stable heterogeneous nucleation than the one of PES ***,the adjustable membrane property enabled the hollow fiber membrane-assisted cooling crystallization to possess the accurate nucleation control and desired terminal particle products.

关键词： Cooling crystallization Nucleation Particle process Hollow fiber membrane Induction period Process control

Designing novel adaptive dynamic event-triggered protocols for uncertain multi-agent systems

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Science China(Information Sciences) 2024年第1期67卷 310-311页

作者： Bin CheNG Bin he College of Electronics and Information Engineering Tongji University Frontiers Science Center for Intelligent Autonomous Systems

Multi-agent systems (MASs) have garnered widespread attention and have been investigated by numerous researchers in recent years, primarily due to their broad applications in industry, transportation, agriculture, and astronomy. While studying the cooperative control of MASs, numerous researchers place emphasis on reducing the frequency of communication among neighboring agents.

关键词： Directed graphs

Neural Stem Cell Competition

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Neuroscience Bulletin 2024年第2期40卷 277-279页

作者： Yanan Li Jie he State Key Laboratory of Neuroscience Institute of NeuroscienceCenter for Excellence in Brain Science and Intelligence TechnologyChinese Academy of SciencesShanghai 200031China University of Chinese Academy of Sciences Beijing 100049China

Cell competition is an adaptive surveillance mechanism to ensure the robustness of developmental outputs,maintain tissue integrity,and regulate tumor progression in multicellular organisms,which is highly conserved from invertebrates to vertebrates[1].At the cellular level,cell competition represents a non-cell-autonomous process in that cells can sense the fitness of their neighbors through cellular interactions,thereby eliminating low-fitness cells and expanding high-fitness counterparts,however,cells develop normally in homogenous populations.

关键词： thereby maintain eliminating

Illuminating functions of evolutionarily conserved long non-coding RNAs

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Science China(Life Sciences) 2024年第9期67卷 2043-2044页

作者： Ruiqiao he Fangqing Zhao Institute of Zoology Chinese Academy of SciencesBeijing 100101China Key Laboratory of Systems health Science of Zhejiang Province Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024China

Long non-coding RNAs(lnc RNAs)serve as crucial regulators of gene expression,influencing various physiological processes and disease states(Cabili et al.,2011;Ulitsky and Bartel,2013;Yao et al.,2019).Dysregulation of certain notable lnc RNAs,such as HOTAIR and MALAT1,has been implicated in a wide range of pathological processes,including tumorigenesis in various human cancers(Gupta et al.,2010;Kim et al.,2018).However,the functions of the majority of lnc RNAs remain elusive.

关键词： MALAT1 HOTAIR

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Waste to treasure:Reutilization of fluid catalytic cracking coke block as photothermal conversion material for water evaporation

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Particuology 2024年第5期88卷 62-70页

作者： Zhuwei Gao Chengxin Li Jingjing he Zhuo Wang Xinyu Qi Lan he Shihao Wang Zhongxin Liu School of Chemical Engineering and Technology Hainan UniversityHaikou 570228China TJ-YZ School of Network Science Haikou University of EconomicsHaikou 570203China School of Food Science and Engineering Hainan UniversityHaikou 570228China Key Laboratory of Advanced Materials of Tropical Island Resources of Ministry of Education Hainan UniversityHaikou 570228China Hainan Provincial Key Laboratory of Fine Chemicals Hainan UniversityHaikou 570228China

This study aims to analyze the coking process and propose an effective method for the reutilization of fluid catalytic cracking(FCC)coke ***,we analyzed the basic characteristics and chemical composition of FCC coke *** results showed that the main components were carbon,oxygen,and aluminum,accounting for 60.8%,26.6%,and 11.5%,*** the conventional catalytic cracking reaction temperature from 500℃ to 600℃,the formation of the first aromatic hydrocarbon was particularly important for the formation of *** condensation of oil-gas-entrained catalyst particles and their heavy components was the physical cause of coking,while the dehydrogenation condensation reaction of oil-gas heavy components was the chemical *** addition,the membrane prepared by powdered coke had excellent photothermal conversion ability,which could be heated to more than 110℃ within 360 s under two fixed light *** evaporation rate of photothermal water was 5.89 kg m^(2) h^(−1),which has great industrial application *** works provide a novel and effective method of separation membrane for the reutilization of FCC coke blocks.

关键词： Coking process Reutilization of FCC coke Carbonaceous deposition Membrane Photothermal conversion

The Role of Adipose Tissue-derived Exosomes in Chronic Metabolic Disorders

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Current Medical Science 2024年第3期44卷 463-474页

作者： Rui he Yong CheN Division of Endocrinology Department of Internal MedicineTongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430030China Laboratory of Endocrinology & Metabolism Key Laboratory of Vascular Aging of the Ministry of EducationTongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430030China Branch of National Clinical Research Center for Metabolic Diseases Wuhan430030China

Excessive fat deposition in obese subjects promotes the occurrence of metabolic diseases,such as type 2 diabetes mellitus(T2DM),cardiovascular diseases,and non-alcoholic fatty liver disease(NAFLD).Adipose tissue is not only the main form of energy storage but also an endocrine organ that not only secretes adipocytokines but also releases many extracellular vesicles(EVs)that play a role in the regulation of whole-body *** are a subtype of EVs,and accumulating evidence indicates that adipose tissue exosomes(AT Exos)mediate crosstalk between adipose tissue and multiple organs by being transferred to targeted cells or tissues through paracrine or endocrine ***,the roles of AT Exos in crosstalk with metabolic organs remain to be fully *** this review,we summarize the latest research progress on the role of AT Exos in the regulation of metabolic ***,we discuss the potential role of AT Exos as biomarkers in metabolic diseases and their clinical application.

关键词： exosome adipose tissue obesity diabetes chronic metabolic disorder miRNA

气候变化对雪豹全球潜在适生区分布的影响与评估

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生态学报 2023年第4期43卷 1412-1425页

作者：杨子文韩姝伊李壹王嘉敏何宏轩中国科学院动物研究所北京100101 中国科学院大学北京100049

气候变化不仅是人类正在面临的挑战,也是野生动物需要应对的危机。雪豹(Panthera uncia)作为亚洲中部高原和山脉的旗舰种,它的生存和繁衍可以反映青藏高原等地区生态系统的健康状况。青藏高原等地区的气候变暖速度远快于全球平均水平,... 详细信息

气候变化不仅是人类正在面临的挑战,也是野生动物需要应对的危机。雪豹(Panthera uncia)作为亚洲中部高原和山脉的旗舰种,它的生存和繁衍可以反映青藏高原等地区生态系统的健康状况。青藏高原等地区的气候变暖速度远快于全球平均水平,研究气候变化对雪豹的生境的影响对于高原物种的保护有重要意义。以雪豹为研究对象,采用第六次国际耦合模式比较计划(CMIP6)气候模式下四种共享社会经济路径(SSPs)对应的未来21世纪中期和21世纪末期的环境数据,并基于最大熵模型(MaxEnt),结合ENMTool、SDMTool、ArcGIS和R等工具对当前和未来全球不同发展模式引起的气候变化对雪豹适宜生境的影响进行了模拟预测和分析评估。研究发现:(1)影响雪豹分布的主要环境因素包括:两种气候变量(年平均气温和最冷月最低温度),两种地形变量(海拔和坡度)和一种水文变量(距离最近河流的距离)。(2)当前气候模式下雪豹的全球潜在适宜分布区的总面积约为1122.05万km^(2),其中低适生区面积为534.5万km^(2),中适生区面积为386.15万km^(2)以及高适生区面积为201.4万km^(2)。我国拥有556.65万km^(2)的雪豹适生区面积,其中低适生区面积为146.2万km^(2),中适生区面积为256.07万km^(2),以及高适生区面积为154.38万km^(2)。(3)研究发现未来不同气候模式下雪豹的中高适生区出现不同程度的缩小,并且雪豹高适生区对气候变化的响应更加显著。位于青藏高原东部、昆仑山脉、天山山脉、阿尔泰山脉以及兴都库什山等地区的雪豹高适生区较为碎片化,更容易受气候变化的影响。此外,在中等发展路径(SSP245)和高速发展路径(SSP585)模式下,雪豹新增的高适生区域有助于增强雪豹分布区之间的连通性。以上研究结果表明气候变化对雪豹生境有重要影响,建议加强对雪豹等高原物种的关注和保护。

关键词：雪豹最大熵模型气候变化环境因子生态位

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Large eddy simulation study of 3D wind field in a complex mountainous area under different boundary conditions

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2024年第7期25卷 541-556页

作者： Yan LI Lei YAN Xuhui he School of Civil Engineering Central South UniversityChangsha410075China National Engineering Research Center for High-speed Railway Construction Changsha410075China Hunan Provincial Key Laboratory for Disaster Prevention and Mitigation of Rail Transit Engineering Structures Changsha410075China

Large eddy simulations generally are used to predict 3D wind field characteristics in complex mountainous *** simulation boundary conditions,such as the height and length of the computational domain or the characteristics of inflow turbulence,can significantly impact the quality of *** this study,we examined these boundary conditions within the context of the mountainous terrain around a long-span cable-stayed bridge using a wind tunnel *** sizes of computational domains and turbulent incoming wind velocities were used in large eddy *** results show that when the height of the computational domain is five times greater than the height of the terrain model,there is minimal influence from the top wall on the wind field characteristics in this complex mountainous *** the length of the wake region of the computational domain has negligible effects on the wind *** in the inlet boundary reduces the length of the wake region on a leeward hill with a low slope,but has less impact on the mean wind velocity of steep hills.

关键词： Large eddy simulation(LES) Spectral representation method Recycling method High mountainous canyon Wind characteristics Atmospheric boundary layer Computational domain

Lifetime-tunable circularly polarized luminescent system based on triplet-to-singlet F?rster resonance energy transfer

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Science China Chemistry 2024年第9期67卷 2918-2922页

作者： Zhenyi he Zizhao Huang Xiang Ma Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center Institute of Fine ChemicalsSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China

Circularly polarized luminescence(CPL)materials have received widespread attention due to their remarkable performance and broad ***,current CPL material research primarily focuses on tunable color,intensity,and *** CPL with adjustable lifetime remains a significant ***,a series of CPL polymeric materials with tunable lifetime were obtained by employing phosphorescent terephthalic acid and chiral organic small molecule R/S-BNAF(a luminescent binaphthol derivative)to copolymerize with acrylamide in different *** was verified that this performance results from the different energy transfer efficiency between luminophores with varying ratios of the monomers for *** strategy to realize CPL with tunable lifetime by modulating the energy transfer efficiency will provide a new perspective to broaden the applications of CPL materials.

关键词： circularly polarized luminescence tunable lifetime F?rster resonance energy transfer room temperature phosphorescence

维普期刊数据库