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fjord-Type AIEgens Based on Inherent Through-Space Conjugation

CCS Chemistry 2024年第7期6卷 1739-1747页

作者： Ye-Qiang Han Yuan Xie Jianyu Zhang Shiyu Tan Haoke Zhang Ben Zhong tang Jonathan L.Sessler feihe Huang Stoddart Institute of Molecular Science Department of ChemistryZhejiang UniversityHangzhou 310058 Zhejiang-Israel Joint Laboratory of Self-Assembling functional Materials ZJU-Hangzhou Global Scientific and Technological Innovation CenterZhejiang UniversityHangzhou 311215 MOE Key Laboratory of Macromolecular Synthesis and functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou 310058 Center for AIE Research College of Materials Science and EngineeringShenzhen UniversityShenzhen 518061 Department of Chemistry Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and ReconstructionThe Hong Kong University of Science and TechnologyKowloonHong Kong 999077 School of Science and Engineering Shenzhen Institute of Aggregate Science and TechnologyThe Chinese University of Hong KongShenzhen(CUHK-Shenzhen)Guangzhou 518172 Department of Chemistry The University of Texas at AustinAustinTexas 78712-1224 Green Catalysis Center and College of Chemistry Zhengzhou UniversityZhengzhou 450001

Through-space conjugation(TSC)is a noncovalently electronic interaction that is emerging as a potential complement to through-bond conjugation(TBC)-based strategies for constructing luminescent ***,the design of efficient luminogens based on TSC is currently challenging due to a lack of established structure-property *** is particularly true in the case of luminogens displaying aggregation-induced emission(AIE)*** this work,three terphenyl derivatives were prepared,and their photophysical properties were systemically *** was found that relative to the corresponding m-and p-linked analogues,the electronic interaction of TBC is weakened while the strength of TSC is commensurately enhanced in the constitutional isomer containing an o-linked fjordtype *** this set of luminogens,the presence of a fjord-type arrangement promotes a transformation from aggregation-caused quenching to *** investigations involving congeneric quaterphenyl and pentphenyl isomers support the universality of the fjord-type unit as a framework for synthesizing AIE-active luminogens(AIEgens)with inherent *** work not only provides a novel set of AIEgens but also establishes the utility of TSC in controlling the photophysical properties of nonconventional and twisted luminogens.

关键词： fjord-type through-space conjugation through-bond conjugation aggregation-induced emission luminescence twisted conformation

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Driving factors behind multiple populations

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Science China(Physics,Mechanics & Astronomy) 2024年第5期67卷 172-181页

作者： Ruoyun Huang Baitian tang Chengyuan Li Doug Geisler Mario Mateo Ying-Yi Song Holger Baumgardt Julio A.Carballo-Bello Yue Wang Jundan Nie Bruno Dias JoséG.fernández-Trincado School of Physics and Astronomy Sun Yat-sen UniversityZhuhai 519082China CSST Science Center for the Guangdong-Hong Kong-Macao Greater Bay Area Zhuhai 519082China Departamento de Astronomía Universidad de ConcepcionConcepcionChile Instituto de Investigación Multidisciplinario en Ciencia y Tecnología Universidad de La SerenaLa SerenaChile Departamento de Astronomía Facultad de CienciasUniversidad de La SerenaChile Department of Astronomy University of MichiganAnn Arbor 48109USA David A.Dunlap Department of Astronomy&Astrophysics University of TorontoToronto ON M5S 3H4Canada Dunlap Institute for Astronomy&Astrophysics University of TorontoToronto ON M5S 3H4Canada School of Mathematics and Physics The University of QueenslandSt.Lucia QLD 4072Australia Instituto de Alta Investigación Universidad de TarapacáAricaChile CAS Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China Instituto de Astrofísica Departamento de Ciencias FísicasFacultad de Ciencias ExactasUniversidad Andres BelloSantiagoChile Instituto de Astronomía Universidad Católica del NorteAntofagastaChile

Star clusters were historically considered simple stellar populations,with all stars sharing the same age and initial chemical ***,the presence of chemical anomalies in globular clusters(GCs),called multiple stellar populations(MPs),has challenged star formation theories in dense *** studies show that mass,metallicity,and age are likely controlling parameters for the manifestation of *** the limit between clusters with/without MPs in physical parameter space is crucial to reveal the driving mechanism behind their *** this study,we look for MP signals in Whiting 1,which is traditionally considered a young *** the Magellan telescope,we obtained low-resolution spectra withinλλ=3850-5500?for eight giants of Whiting *** measured the C and N abundances from the CN and CH spectral indices.C and N abundances have variations comparable with their measurement errors(~0.1 dex),suggesting that MPs are absent from Whiting *** these findings with literature studies,we propose a limit in the metallicity *** compactness index parameter space,which relatively clearly separates star clusters with/without MPs(GCs/open clusters).This limit is physically *** a larger scale,the galactic environment determines cluster compactness and metallicity,leading to metal-rich,diffuse,old clusters formed ex *** proposed limit also impacts our understanding of the formation of the Sagittarius dwarf galaxy:star clusters formed after the first starburst(age≤8-10 Gyr).These clusters are simple stellar populations because the enriched galactic environment is no longer suitable for MP formation.

关键词： stellar galactic galaxy

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国家自然科学基金光学和光电子学学科项目申请资助分析和规划展望(特邀)

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中国激光 2024年第1期51卷 419-431页

作者：唐华张丽佳国家自然科学基金委员会信息科学部北京100085

本文从国家自然科学基金申请与资助的角度,总结回顾了自“十三五”(2016—2020年)以来至“十四五”开局之年(2021年)期间国家自然科学基金委员会信息科学部光学和光电子学学科(f05)自由探索类项目、引导类项目以及人才类项目的申请资助... 详细信息

本文从国家自然科学基金申请与资助的角度,总结回顾了自“十三五”(2016—2020年)以来至“十四五”开局之年(2021年)期间国家自然科学基金委员会信息科学部光学和光电子学学科(f05)自由探索类项目、引导类项目以及人才类项目的申请资助情况,从项目数量、资助额度、依托单位、学科领域等角度分析了该领域基金资助的总体特征、结构性变化以及发展趋势,依据这一时期的优秀科研成果分析了基金资助的成效,并结合“十四五”发展规划对光学和光电子学学科未来的优先发展领域与基金管理工作进行了展望。

关键词：光学和光电子学资助趋势优化布局

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Passive neutron multiplicity device for^(240)Pu measurement based on fpgA

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Nuclear Science and Techniques 2024年第9期35卷 141-154页

作者： Yan Zhang Hao-Ran Zhang Ren-Bo Wang Ming-Yu Li Rui Chen Hai-Tao Wang Xiang-Ting Meng Shu-Min Zhou Bin tang fundamental Science on Radioactive Geology and Exploration Technology Laboratory East China University of TechnologyNanchang 330013China Engineering Research Center for Nuclear Technology Application Ministry of EducationEast China University of TechnologyNanchang 330013China Pan China Detect Technology Co.Ltd. Nanchang 330013China

A passive neutron multiplicity measurement device,fH-NCM/S1,based on field-programmable gate arrays(fpgAs),is developed specifically for measuring the mass of plutonium-240(^(240)Pu)in mixed oxide ***-NCM/S1 adopts an inte-grated approach,combining the shift register analysis mode with the pulse-position timestamp mode using an *** optimal effective length of the^(3)He neutron detector was determined to be 30 cm,and the thickness of the graphite reflector was ascertained to be 15 cm through MCNP *** fabricating the device,calibration measurements were per-formed using a^(252)Cf neutron source;a detection efficiency of 43.07%and detector die-away time of 55.79μs were *** samples of plutonium oxide were measured under identical conditions using the fH-NCM/S1 in shift register analysis mode and a plutonium waste multiplicity *** obtained double rates underwent corrections for detection efficiency(ε)and double gate fraction(f_(d)),resulting in corrected double rates(D_(c)),which were used to validate the accuracy of the shift register analysis ***,the device exhibited fluctuations in the measurement results,and within a single 20 s measurement,these fluctuations remained below 10%.After 30 cycles,the relative error in the mass of^(240)Pu was less than 5%.finally,correlation calculations confirmed the robust consistency of both measurement *** study holds specific significance for the subsequent design and development of neutron multiplicity devices.

关键词： Spent fuel Non-destructive assay Neutron multiplicity ^(240)Pu fpgA

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E674Q(Shanghai APP mutant),a novel amyloid precursor protein mutation,in familial late-onset Alzheimer's disease

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Genes & Diseases 2024年第2期11卷 1022-1034页

作者： Yongfang Zhang Xinyi Xie Boyu Chen Lina Pan Jianping Li Wanbing Wang Jintao Wang Ran tang Qiang Huang Xiaofen Chen Rujing Ren Zhentao Zhang Wei fu Gang Wang Department of Neurology Ruijin Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghai 200025China Department of Pharmacology and Chemical Biology Shanghai Jiao Tong University School of MedicineShanghai 200025China Department of Medicinal Chemistry School of PharmacyFudan UniversityShanghai 201203China Department of Neurology Renmin Hospital of Wuhan UniversityWuhanHubei 430060China fujian Provincial Key Laboratory of Neurodegenerative Disease and Aging Research Institute of NeuroscienceSchool of MedicineXiamen UniversityXiamenFujian 361102China Shenzhen Research Institute of Xiamen University ShenzhenGuangdong 518063China

Identified as the pathogenic genes of Alzheimer's disease(AD),APP,PSEN1,and PSEN2 mainly lead to early-onset AD,whose course is more aggressive,and atypical symptoms are more common than sporadic ***,a novel missense mutation,APP E674Q(also named“Shanghai APP”),was detected in a Chinese index patient with typical late-onset AD(LOAD)who developed memory decline in his *** results from neuroimaging were consistent with AD,where widespread amyloidβdeposition was demonstrated in 18 f-florbetapir Positron Emission Tomography(PET).APP E674Q is close to theβ-secretase cleavage site and the well-studied Swedish APP mutation(KM670/671NL),which was predicted to be pathogenic in *** dynamics simulation indicated that the E674Q mutation resulted in a rearrangement of the interaction mode between APP and BACE1 and that the E674Q mutation was more prone to cleavage by *** in vitro results suggested that the E674Q mutation was pathogenic by facilitating the BACE1-mediated processing of APP and the production of Aβ.furthermore,we applied an adeno-associated virus(AAV)-mediated transfer of the human E674Q mutant APP gene to the hippocampi of two-month-old C57Bl/6 J ***-E674Q-injected mice exhibited impaired learning behavior and increased pathological burden in the brain,implying that the E674Q mutation had a pathogenicity that bore a comparison with the classical Swedish ***,we report a strong amyloidogenic effect of the E674Q substitution in *** our knowledge,E674Q is the only pathogenic mutation within the amyloid processing sequence causing LOAD.

关键词： Alzheimer's disease Amyloid beta APP mutation E674Q Late onset

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A seismic elastic moduli module for the measurements of low-frequency wave dispersion and attenuation of fluid-saturated rocks under different pressures

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Petroleum Science 2024年第1期21卷 162-181页

作者： Yan-Xiao He Shang-Xu Wang Gen-Yang tang Chao Sun Hong-Bing Li San-Yi Yuan Xian Wei Li-Deng Gan Xiao-feng Dai Qiang Ge Peng-Peng Wei Hui-Qing Zhang National Key Laboratory of Petroleum Resources and Engineering CNPC Key Lab of Geophysical ExplorationCollege of GeophysicsChina University of Petroleum(Beijing)Beijing102249China School of Resources and Geosciences China University of Mining and TechnologyXuzhou221116JiangsuChina Research Institute of Petroleum Exploration and Development CNPCBeijing100083China Beijing Vocational College of Labour and Social Security Beijing100029China PetroChina Dagang Oilfield Exploration and Development Research Institute CNPCTianjin300280China

Knowledge about the seismic elastic modulus dispersion,and associated attenuation,in fluid-saturated rocks is essential for better interpretation of seismic observations taken as part of hydrocarbon identification and time-lapse seismic surveillance of both conventional and unconventional reservoir and overburden performances.A Seismic Elastic Moduli Module has been developed,based on the forced-oscillations method,to experimentally investigate the frequency dependence of Young's modulus and Poisson's ratio,as well as the inferred attenuation,of cylindrical samples under different confining pressure *** with three standard samples showed that the measured elastic moduli were consistent with the published data,indicating that the new apparatus can operate reliably over a wide frequency range of f∈[1-2000,10^(6)]*** Young's modulus and Poisson's ratio of the shale and the tight sandstone samples were measured under axial stress oscillations to assess the frequency-and pressure-dependent *** dry condition,both samples appear to be nearly frequency independent,with weak pressure dependence for the shale and significant pressure dependence for the *** particular,it was found that the tight sandstone with complex pore microstructure exhibited apparent dispersion and attenuation under brine or glycerin saturation conditions,the levels of which were strongly influenced by the increased effective *** addition,the measured Young's moduli results were compared with the theoretical predictions from a scaled poroelastic model with a reasonably good agreement,revealing that the combined fluid flow mechanisms at both mesoscopic and microscopic scales possibly responsible for the measured dispersion.

关键词： Low-frequency measurements Dispersion and attenuation Rock physics fluid flow

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Tunable THz spectrum analyzer with hyperspectral resolution

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Chinese Optics Letters 2024年第7期22卷 111-116页

作者： Xin He Mingjia Yao Chengwei Qian Leixin Meng Xiaowei Liu Wenhao tang Xiaoming Shen Paul Beckett Duo Xiao Xu Liu Rui Yin School of Information and Electrical Engineering Hangzhou City UniversityHangzhou 310015China Research Center for Humanoid Sensing Zhejiang LabHangzhou 311121China State Key Laboratory of Modern Optical Instrumentation College of Optical Science and EngineeringZhejiang UniversityHangzhou 310027China Research Center for Intelligent Chips and Devices Zhejiang LabHangzhou 311121China STEM College RMIT UniversityMelbourneVIC 3000Australia

We present a tunable terahertz(THz)spectrum analyzer with hyperspectral resolution formed from electrically tunable metamaterial and plasmonic *** few as eight encoders based on four detectors are needed to recover 396 spectral *** incident spectra in the range of 1–5 THz can be reconstructed with a localization precision of 0.3 GHz and a minimum average mean squared error(MSE)of 6.9×10−*** proposed analyzers are faster and more portable than those based on frequency combs and power meters,and more accurate than existing fourier transform techniques,showing promising applications in pathology,biomedical imaging,and many other areas.

关键词： tunable metamaterial plasmonics spectrum analyzer.

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DRP1调控线粒体稳态对人视网膜色素上皮细胞上皮-间充质转化的影响

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眼科新进展 2024年第6期44卷 443-448页

作者：汤中唐云骢永州职业技术学院附属医院眼科湖南省永州市425000

目的探讨线粒体动力相关蛋白(DRP1)对人视网膜色素上皮(ARPE-19)细胞上皮-间充质转化(EMT)进程的影响。方法构建H_(2)O_(2)干预ARPE-19细胞模型,将ARPE-19细胞分为3组,NG组:采用含体积分数10%胎牛血清的DMEM/f12培养基培养细胞6 h;H_(2)... 详细信息

目的探讨线粒体动力相关蛋白(DRP1)对人视网膜色素上皮(ARPE-19)细胞上皮-间充质转化(EMT)进程的影响。方法构建H_(2)O_(2)干预ARPE-19细胞模型,将ARPE-19细胞分为3组,NG组:采用含体积分数10%胎牛血清的DMEM/f12培养基培养细胞6 h;H_(2)O_(2)组:先采用650μmol·L^(-1)H_(2)O_(2)干预细胞,此后培养方式及时间与NG组相同;H_(2)O_(2)+Mdivi-1组:先采用10μmol·L^(-1)Mdivi-1处理ARPE-19细胞2 h,再给予650μmol·L^(-1)H_(2)O_(2)干预,此后培养方式及时间与NG组相同。Western blot检测各组细胞p-DRP-1/DRP1、E-钙黏蛋白、N-钙黏蛋白、α-平滑肌肌动蛋白(α-SMA)、波型蛋白(Vimintin)及紧密连接蛋白(ZO-1)表达水平;线粒体红色荧光探针检测各组细胞线粒体形态;线粒体超氧化物红色荧光探针检测各组细胞线粒体活性氧(ROS)水平;JC-1染色试剂盒检测各组细胞线粒体膜电位;免疫荧光检测各组细胞中ZO-1表达水平。结果H_(2)O_(2)组细胞p-DRP-1/DRP1蛋白表达比值高于NG组,H_(2)O_(2)+Mdivi-1组细胞p-DRP-1/DRP1蛋白表达比值低于H_(2)O_(2)组,差异均有统计学意义(均为P<0.05)。H_(2)O_(2)+Mdivi-1组细胞较H_(2)O_(2)组线粒体碎片化程度得到改善。H_(2)O_(2)组细胞线粒体ROS水平(4.42±0.29)与NG组(1.00±0.17)及H_(2)O_(2)+Mdivi-1组(2.15±0.18)比较,差异均有统计学意义(均为P<0.05)。H_(2)O_(2)组细胞红/绿荧光强度比值(0.16±0.12)与NG组(1.00±0.09)及H_(2)O_(2)+Mdivi-1组(0.42±0.05)比较,差异均有统计学意义(均为P<0.05)。H_(2)O_(2)组细胞上皮样标志物表达下降,间质样标志物表达上升,H_(2)O_(2)+Mdivi-1组细胞上皮样标志物表达上升,间质样标志物表达下降。各组细胞α-SMA、N-钙黏蛋白、E-钙黏蛋白、Vimintin及ZO-1相对表达量比较,H_(2)O_(2)组与NG组及H_(2)O_(2)+Mdivi-1组比较,差异均有统计学意义(均为P<0.05)。ZO-1免疫荧光染色实验显示,H_(2)O_(2)+Mdivi-1组的细胞连接紧密程度优于H_(2)O_(2)组。结论DRP1可调控线粒体动态平衡,靶向DRP1可改善线粒体功能并抑制EMT进展,从而减轻H_(2)O_(2)诱导的RPE细胞功能障碍。

关键词：线粒体动力相关蛋白线粒体功能人视网膜色素上皮细胞上皮-间充质转化年龄相关性黄斑变性

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Low-intensity pulsed ultrasound reduces alveolar bone resorption during orthodontic treatment via Lamin A/C-Yes-associated protein axis in stem cells

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World Journal of Stem Cells 2024年第3期16卷 267-286页

作者： Tong Wu fu Zheng Hong-Yi tang Hua-Zhi Li Xin-Yu Cui Shuai Ding Duo Liu Cui-Ying Li Jiu-Hui Jiang Rui-Li Yang Department of Orthodontics Peking University School and Hospital of StomatologyNational Engineering Laboratory for Digital and Material Technology of StomatologyBeijing Key Laboratory of Digital StomatologyBeijing 100081China Department of Central Laboratory Peking University School and Hospital of StomatologyNational Clinical Research Center for Oral Diseases&National Engineering Laboratory for Digital and Material Technology of StomatologyBeijing Key Laboratory of Digital StomatologyBeijing 100081China

BACKGROUND The bone remodeling during orthodontic treatment for malocclusion often requires a long duration of around two to three years,which also may lead to some complications such as alveolar bone resorption or tooth root ***-intensity pulsed ultrasound(LIPUS),a noninvasive physical therapy,has been shown to promote bone fracture *** is also reported that LIPUS could reduce the duration of orthodontic treatment;however,how LIPUS regulates the bone metabolism during the orthodontic treatment process is still *** To investigate the effects of LIPUS on bone remodeling in an orthodontic tooth movement(OTM)model and explore the underlying *** A rat model of OTM was established,and alveolar bone remodeling and tooth movement rate were evaluated via micro-computed tomography and staining of tissue *** vitro,human bone marrow mesenchymal stem cells(hBMSCs)were isolated to detect their osteogenic differentiation potential under compression and LIPUS stimulation by quantitative reverse transcription-polymerase chain reaction,Western blot,alkaline phosphatase(ALP)staining,and Alizarin red *** expression of Yes-associated protein(YAP1),the actin cytoskeleton,and the Lamin A/C nucleoskeleton were detected with or without YAP1 small interfering RNA(siRNA)application via *** The force treatment inhibited the osteogenic differentiation potential of hBMSCs;moreover,the expression of osteogenesis markers,such as type 1 collagen(COL1),runt-related transcription factor 2,ALP,and osteocalcin(OCN),*** could rescue the osteogenic differentiation of hBMSCs with increased expression of osteogenic marker inhibited by ***,the expression of LaminA/C,f-actin,and YAP1 was downregulated after force treatment,which could be rescued by ***,the osteogenic differentiation of hBMSCs increased by LIPUS could be attenuated by YAP siRNA ***,LIPUS increased alveolar

关键词： Low-intensity pulsed ultrasound Bone resorption Osteogenesis Cytoskeleton-Lamin A/C-Yes-associated protein axis Bone marrow mesenchymal stem cells Orthodontic tooth movement

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Adsorption of yttrium(Y^(3+)) and concentration of rare earth elements from phosphogypsum using chitin and chitin aerogel

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Journal of Rare Earths 2024年第4期42卷 775-782页

作者： Glaydson S.dos Reis Diana Pinto Sabrina f.Lütke Eder C.Lima Luis f.O.Silva Irineu A.S.De Brum Guilherme L.Dotto Department of forest Biomaterials and Technology Biomass Technology Centre Swedish University of Agricultural SciencesUmeaE13Swedn Universidad De La Costa Calle 58#55-66080002BarranquillaAtlanticoColombia Research Group on Adsorptive and Catalytic Process Engineering(ENGEPAC) Federal University of Santa MariaAv.Roraima100079705900Santa MariaRSBrazil Institute of Chemistry Federal University of Rio Grande do Sul90040060Porto AlegreBrazil

Chitin powder and chitin-aerogel were prepared from shrimp wastes and used to uptake Y^(3+)from aqueous solutions and concentrate this rare earth element from phosphogypsum(pg).Chitin aerogel displays a specific surface area of 945 m^(2)/g,while chitin powder is 3.6 m^(2)/g,which largely influences its adsorption *** the adsorption in synthetic solutions,the effect of pH on Y^(3+)removal is strong for chitin powder *** contrast,no big pH influence was detected for chitin *** interactions and chelation can highlight the proposed mechanism of Y^(3+)on chitin adsorbents for the powder and ***,in addition to these interactions,pore filling/pore diffusion is the main mechanism of Y^(3+)removal in the chitin *** aerogel is efficient in concentrating 8 times the Y^(3+)from pg,a very complex *** complex chitin aerogel-Y^(3+)can be a secondary source of rare earth elements for other applications.

关键词： Rare earths Sustainable material Chitin powder Chitin porous aerogel Yttrium adsorption and recovery

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