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Smart light-responsive hierarchical metal organic frameworks constructed mixed matrix membranes for efficient gas separation

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Green Chemical Engineering 2022年第1期3卷 71-82页

作者： Qingping Xin Xueting Cao Dandan Huang Shuo Li Xinghui Zhang Guangyu Xuan mengting wei Lei Zhang Xiaoli Ding Yuzhong Zhang School of Materials Science and Engineering State Key Laboratory of Separation Membranes and Membrane ProcessesTiangong UniversityTianjin300387China

One type of new light-responsive hierarchical metal organic framework(MOF) has been successfully prepared using Co(NO_(3))_(3)·6H_(2)O as the metal salt and 4,4’-azobenzenedicarboxylic acid as the ligand by microwave method for the first time. It is found that MOF [Co(Az DC)] exhibits a light-responsive characteristic to SO_(2)adsorption due to the presence of azo group from the ligand. The light-responsive hierarchical MOFs are incorporated into Matrimid■ 5218(PI) matrix to prepare mixed matrix membranes(MMMs) for gas separation application. The morphology, crystallinity, chain mobility and thermal stability of MMMs are explored. Results show that Co(Az DC) may elevate both the CO_(2)(SO_(2)) permeability and CO_(2)(SO_(2))/N_(2)selectivity of the MMMs. In particular,the Co(Az DC) doped MMMs exhibit the significantly improved CO_(2)(SO_(2))/N_(2)selectivity from 33(123) for PI control membrane to 78(420) for MMMs, overcoming the 2008 Robeson upper bound for CO_(2)/N_(2)system. Sizesieving effect of Co(Az DC) with pore size 0.35 nm enhances the selectivity, while the –N=N– group from Co(Az DC) shows affinity to CO_(2)molecular rather than N_(2), also elevating selectivity of MMMs. In brief, enhanced selectivity of high-performance membrane is attributed to incorporation of Co(Az DC) particles, which displays synergistic effects both in size-sieving and CO_(2)-philic interaction for CO_(2)/N_(2)separation. Smart highly selective interface is constructed in MMMs by switching the configuration of MOFs from cis to trans. The SO_(2)permeability and SO_(2)/N_(2)selectivity of MMMs are investigated under both visible light and ultraviolet light states, and the SO_(2)/N_(2)separation performance under visible light is notably improved in comparison with that under ultraviolet light state.

关键词： Mixed matrix membranes Matrimid■5218 Metal-organic framework Light-responsive characteristic Gas separation

Association of fluid-attenuated inversion recovery vascular hyperintensity with ischaemic events in internal carotid artery or middle cerebral artery occlusion

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Stroke & Vascular Neurology 2023年第1期8卷 69-76页

作者： Jinhao Lyu Jianxing Hu Xinrui Wang Xiangbing Bian mengting wei Liuxian Wang Qi Duan Yina Lan Dekang Zhang Xueyang Wang Tingyang Zhang Chenglin Tian Xin Lou Radiology Chinese PLA General Hospital/Chinese PLA Medical SchoolBeijingChina Radiology Chinese PLA General HospitalBeijingChina Neurology Chinese PLA General HospitalBeijingChina

Background and purpose Individuals with intracranial artery occlusion have high rates of ischaemic events and *** has been challenging to identify patients who had high-risk stroke using a simple,valid and non-invasive screening *** study aimed to investigate whether fluid-attenuated inversion recovery(FLAIR)vascular hyperintensity(FVH),a specific imaging sign on the FLAIR sequence,could be a predictor of ischaemic events in a population with internal carotid artery(ICA)or middle cerebral artery(MCA)*** We retrospectively analysed 147 patients(mean 60.43±12.83 years)with 149 lesions,including 37 asymptomatic and 112 symptomatic cases of ICA or MCA *** occlusion was considered if ischaemic events were present in the relevant territory within 90 *** Alberta Stroke Program Early Computed Tomography Score(FVH-ASPECTS:0-7,with 0 indicating absence of FVH and 7 suggesting prominent FVH)and collateral circulation grade were assessed for each *** logistic regression analysis was performed to detect independent markers associated with symptomatic *** A lower FVH-ASPECTS was associated with a more favourable collateral circulation grade(rho=−0.464,p<0.0001).The FVH-ASPECTS was significantly lower in the asymptomatic occlusion group than in the symptomatic occlusion group(p<0.0001).FVH-ASPECTS(Odd ratio,2.973;95%confidence interval,1.849 to 4.781;p<0.0001)was independently associated with symptomatic status after adjustment for age,sex,lesion location and collateral circulation grade in the multivariate logistic *** area under the curve was 0.861 for the use of FVH-ASPECTS to identify symptomatic *** The ability to discriminate symptomatic from asymptomatic occlusion suggests that FVH may be a predictor of *** a simple imaging sign,FVH may serve as a surrogate for haemodynamic impairments and can be used to identify high-risk stroke cases early in ICA or

关键词： occlusion fluid cerebral

Prestoring lithium into SnO_(2)coated 3D carbon fiber cloth framework as dendrite-free lithium metal anode

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Particuology 2024年第1期84卷 89-97页

作者： Tao wei Yanyan Zhou Cheng Sun Lesheng Liu Sijia Wang mengting Wang Ye Liu Qing Huang Quanchao Zhuang Yongfu Tang School of Energy and Power Jiangsu University of Science and TechnologyZhenjiang212003China College of Materials Science and Engineering Nanjing Forestry UniversityNanjing210037China Li-ion Batteries Lab School of Materials Science and EngineeringChina University of Mining and TechnologyXuzhouChina Hebei Key Laboratory of Applied Chemistry School of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao066004China

For several decades,the promise of implementing of lithium(Li)metal anodes has been regarded as the"holy grail"for Li-based ***,we have proposed a facile design of a carbon fiber cloth(CFC)framework coated with SnO_(2)nanoparticles through a hydrothermal process,which served as a reliable host for prestoring molten Li to produce a CFC@SnO_(2)@Li composite ***,TEM,HRTEM,XPS and different electrochemical characterizations were carried *** to the synergetic effects of the 3D conductive CFC and the coated lithiophilic SnO_(2)nanoparticles,the designed CFC@SnO_(2)@Li electrodes can buffer the volume changes and reduce the local current density,thus suppress the Li dendrites during ***,the CFC@SnO_(2)electrodes showed a high and stable CE of 98.6%for 1000 cycles at a current density of 1 mA cm^(-2)(1 mAh cm^(-2)).What is more,at a high current density of 5 mA cm^(-2)and a high areal capacity of 5 mAh cm^(-2),the symmetric cell displayed relatively low overpotential and long cycling lifetime of 1600 *** results confirm its great potential as lithium metal anodes in practical battery applications.

关键词： Lithiophilic Lithium metal anodes SnO_(2) 3D anode Dendrite-free

Identification,characterization,and verification of miR399 target gene in grape

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Horticultural Plant Journal 2024年第1期10卷 91-102页

作者： Maosong Pei Hainan Liu Tonglu wei Huiying Jin Yihe Yu mengting Ma Xiaomeng Song Rundong Dai Dalong Guo Henan Engineering Technology Research Center of Quality Regulation and Controlling of Horticultural Plants College of Horticulture and Plant ProtectionHenan University of Science and TechnologyLuoyangHenan 471023China

The microRNA miR399 plays an important role in phosphorus signal transduction pathways in ***,miR399 was shown to be closely associated with berry ripening in grape(Vitis vinifera).The objective of the present study was to elucidate the evolutionary characteristics of the miR399 gene family in grape and to verify the cleavage effect on the target *** miR399s were identified by miRNA sequencing and retrieval from the miRBase *** mature sequences and precursor sequences were subjected to phylogenetic analysis to reconstruct evolutionary trees,as well as secondary structure analysis of the precursor sequence,and prediction of target *** cisacting elements in the miR399 promoter were predicted and the cleavage effect of grape miR399b on its target genes was *** grape miR399 family comprised nine precursor sequences and nine mature *** precursor sequences formed a typical and stable stem—loop *** minimum folding free energy ranged from-55.70 kcal·mol^(-1)to-37.40 kcal·mol^(-1).Multiple sequence alignment revealed that the miR399 family was highly *** grape miR399 family was phylogenetically closely related to peach,apple,and citrus *** miR399s were predicted to target inorganic phosphate transporter 1—3,phospholipase D delta-like,and *** cleavage effect of grape miR399b on the target genes was verified by means of a dual-luciferase assay and 5’*** GUS staining showed that the promoter activity of miR399b was promoted by GA3treatment.

关键词： Grape miR399 Phosphorus metabolism Early ripening

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关于Freiman-Lev猜想的一些注记

数学进展 2023年第1期52卷 53-61页

作者：汤敏位梦婷安徽师范大学数学与统计学院安徽芜湖241002

本文关注Freiman-Lev的一个猜想,刻画了一些小限制和集的结构.

关键词：限制和集 Freiman定理

超极化 129Xe多核MRI方法及其在脑部疾病的应用进展

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中华放射学杂志 2022年第6期56卷 703-705页

作者：程焜段曹辉魏梦婷娄昕解放军总医院第一医学中心放射诊断科北京100853 贵州医科大学医学影像学院贵阳550004

相对临床MRI所用1H作为成像原子来说,以^(129)Xe为成像原子的MR被称为多核MRI。^(129)Xe具有高脂溶性且能溶于血液,可随血液循环进入大脑。超极化技术可以将大脑的^(129)Xe MR信号强度进行指数级别的提升,这成为^(129)Xe多核MRI用于脑... 详细信息

相对临床MRI所用1H作为成像原子来说,以^(129)Xe为成像原子的MR被称为多核MRI。^(129)Xe具有高脂溶性且能溶于血液,可随血液循环进入大脑。超极化技术可以将大脑的^(129)Xe MR信号强度进行指数级别的提升,这成为^(129)Xe多核MRI用于脑部研究的基础。目前超极化^(129)Xe多核MRI技术在了解大脑生理活动、研究脑灌注及脑氧代谢等方面具备了一定的研究基础,未来在探索疾病发病机制、早期诊断、疗效监测和预后预测方面具有良好的开发价值。

关键词：磁共振成像氙同位素超极化磁共振波谱

项目化学习赋能校园英语戏剧文化活动创设——以“中国故事,世界表达”主题项目为例

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英语教师 2023年第4期23卷 35-38页

作者：韦梦婷广东省广州市增城区新塘镇天伦学校广东广州510000

以指向英语学科核心素养的英语学习活动观为指导,以“中国故事,世界表达”主题项目为例,阐述深度学习视域下师生开展项目化学习的可行性设计与具体实施策略,旨在通过育人目标的设立与驱动性问题的创设协助学生搭建学习框架,深化英语学... 详细信息

以指向英语学科核心素养的英语学习活动观为指导,以“中国故事,世界表达”主题项目为例,阐述深度学习视域下师生开展项目化学习的可行性设计与具体实施策略,旨在通过育人目标的设立与驱动性问题的创设协助学生搭建学习框架,深化英语学习情境体验,拓宽综合语言运用能力的培养途径,达到其关键能力发展与文化品格提升的目的。

关键词：项目化学习问题导学教育戏剧英语学科核心素养

The Clumpy Structure of Five Star-bursting Dwarf Galaxies in the MaNGA Survey

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Research in Astronomy and Astrophysics 2024年第2期24卷 83-103页

作者： mengting Ju Jun Yin Lei Hao Chenxu Liu Chao-wei Tsai Junfeng Wang Zhengyi Shao Shuai Feng Yu Rong Key Laboratory for Research in Galaxies and Cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China University of Chinese Academy of Sciences Beijing 100049China Key Lab for Astrophysics Shanghai 200034China South-Western Institute for Astronomy Research Yunnan UniversityKunming 650500China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China Institute for Frontiers in Astronomy and Astrophysics Beijing Normal UniversityBeijing 102206China Department of Astronomy Physics BuildingXiamen UniversityXiamenFujian 361005China College of Physics Hebei Normal UniversityShijiazhuang 050024China Hebei Key Laboratory of Photophysics Research and Application Shijiazhuang 050024China Department of Astronomy University of Science and Technology of ChinaHefei 230026China

The star-forming clumps in star-bursting dwarf galaxies provide valuable insights into understanding the evolution of dwarf *** this paper,we focus on five star-bursting dwarf galaxies featuring off-centered clumps in the Mapping Nearby Galaxies at Apache Point Observatory *** the stellar population synthesis software Fitting Analysis using Differential evolution Optimization,we obtain the spatially resolved distribution of the star formation history,which allows us to construct the g-band images of the five galaxies at different *** images can help us to probe the evolution of the morphological structures of these *** images of a stellar population older than 1 Gyr are typically smooth,images of a stellar population younger than 1 Gyr reveal significant clumps,including multiple clumps which appear at different locations and even different *** study the evolutionary connections of these five galaxies to other dwarf galaxies before their star-forming clumps appear,we construct the images of the stellar populations older than three age nodes,and define them to be the images of the"host"*** find that the properties such as the central surface brightness and the effective radii of the hosts of the five galaxies are in between those of dwarf ellipticals(dEs)and dwarf irregulars(dIrrs),with two clearly more similar to dEs and one more similar to *** the five galaxies,8257-3704 is particularly interesting,as it shows a previous starburst event that is not quite visible from its gri image,but only visible from images of the stellar population at a few hundred million *** star-forming clump associated with this event may have appeared at around 600 Myr ago and disappeared at around 40 Myr ago.

关键词： galaxies dwarf-galaxies evolution-galaxies formation-Galaxy structure

Effect of SARS-CoV-2 infection in early pregnancy on placental development

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Science China(Life Sciences) 2024年第3期67卷 622-625页

作者： Shanru Yi Liping Wang mengting Wang wei Hong Ben Xu Xiaoying He Mengtian Yang Zhiping Wu Beiying Wang Guang Yang Shijun Shen Xinyu Cui Ruixue Wang Kai Wang Hong Wang Xiaocui Li Shaorong Gao Cizhong Jiang Jiayu Chen Clinical and Translation Research Center of Shanghai First Maternity and Infant Hospital Shanghai Key Laboratory of Signaling and Disease ResearchSchool of Life Sciences and TechnologyTongji UniversityShanghai 200092China Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration of the Ministry of Education Orthopaedic Department of Tongji HospitalTongji UniversityShanghai 200065China Frontier Science Center for Stem cell Research Tongji UniversityShanghai 200092China Shanghai Key Laboratory of Maternal Fetal Medicine Shanghai First Maternity and Infant HospitalSchool of MedicineTongji UniversityShanghai 201204China

Dear Editor,Since the COVID-19 pandemic, the potential risks associated with maternal SARS-CoV-2 infection and its effect on fetal development have been a subject of considerable public concern. Previous studies have ... 详细信息

关键词： pregnancy fetal Effect