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Heterophase junction engineering-induced co spin-state modulation of coSe_(2) for large-current hydrogen evolution reaction

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Rare Metals 2024年第6期43卷 2660-2670页

作者： Bao-chai Xu Ya-Ping Miao Min-Qin Mao Dong-lian.Li Song Xie Wei-Hong Jin Shu Xiao Jing Wen Zaenab Abd-Allah Zhi-Tian Liu Xiang Peng Paul K.chu Hubei Key Laboratory of Plasma chemistry and Advanced Materials School of Materials Science and EngineeringWuhan Institute of TechnologyWuhan 430205China School of Textile Science and Engineering Xi'an Polytechnic UniversityXi'an 710048China Institute of Advanced Wear and corrosion Resistant and Functional Materials Jinan UniversityGuangzhou 510632China Institute of Safety Science and Engineering South China University of TechnologyGuangzhou 510641China Department of Engineering Manchester Metropolitan UniversityManchester M156BHUK Department of Physics Department of Materials Science and Engineeringand Department of Biomedical EngineeringCity University of Hong KongHong Kong 999077China

Efficient electrocatalysts are vital to large-current hydrogen production in commercial water splitting for green energy ***,a novel heterophase engineering strategy is described to produce polymorphic coSe_(2)*** composition of the electrocatalysts consisting of both cubic coSe_(2)(c-coSe_(2))and orthorhombic coSe_(2)(o-coSe_(2))phases can be controlled *** results demonstrate that junction-induced spin-state modulation of co atoms enhances the adsorption of intermediates and accelerates charge transfer resulting in superior large-current hydrogen evolution reaction(HER)***,the coSe_(2)based heterophase catalyst with the optimal c-coSe_(2)content requires an overpotential of merely 240 mV to achieve 1,000 mA·cm^(-2)as well as a Tafel slope of 50.4 mV·dec^(-1).Furthermore,the electrocatalyst can maintain a large current density of 1,500 mA·cm^(-2)for over 320 h without *** results reveal the advantages and potential of heterophase junction engineering pertaining to design and fabrication of low-cost transition metal catalysts for large-current water splitting.

关键词： Heterophase junction Spin-state Hydrogen evolution reaction Large current electrochemical hydrogen production Water splitting

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Engineered AAV13 variants with enhanced transduction and confined spread

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Zoological Research 2024年第4期45卷 781-790页

作者： Neng-Song Luo Yu-Xiang cai Zeng-Peng Han Xiao-Kai Sui Wen-Jia Yuan Zi-lian.Zhang Hao-Dong Guo Jie Wang Kun-Zhang Lin Fu-Qiang Xu Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhanHubei 430074China Shenzhen Key Laboratory of Viral Vectors for Biomedicine Shenzhen-Hong Kong Institute of Brain ScienceShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenGuangdong 518055China Key Laboratory of Magnetic Resonance in Biological Systems State Key Laboratory of Magnetic Resonance and Atomic and Molecular PhysicsNational Center for Magnetic Resonance in WuhanInnovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhanHubei 430071China Key Laboratory of Quality control Technology for Virus-Based Therapeutics Guangdong Provincial Medical Products AdministrationNMPA Key Laboratory for Research and Evaluation of Viral Vector Technology in Cell and Gene Therapy Medicinal ProductsBrain Cognition and Brain Disease InstituteShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenGuangdong 518055China University of chinese Academy of Sciences Beijing 100049China Zhongnan Hospital Wuhan UniversityWuhanHubei 430072China Brain case Biotechnology co. Ltd.ShenzhenGuangdong 518107China college of Life Sciences Wuhan UniversityWuhanHubei 430072China center for Excellence in Brain Science and Intelligence Technology Chinese Academy of SciencesShanghai 200031China

Precise targeting of specific regions within the central nervous system(cNS)is crucial for both scientific research and gene therapy in the context of brain ***-associated virus 13(AAV13)is known for its restricted diffusion range within the cNS,making it an ideal choice for precise labeling and administration within small brain ***,AAV13 mediates relatively low expression of target ***,we introduced specifically engineered modifications to the AAV13 capsid protein to enhance its transduction *** first constructed AAV13-YF by mutating tyrosine to phenylalanine on the surface of the AAV13 *** then inserted the 7m8 peptide,known to enhance cell transduction,into positions 587/588 and 585/586 of the AAV13 capsid,resulting in two distinct variants named AAV13-587-7m8 and AAV13-585-7m8,*** found that AAV13-YF exhibited superior in vitro infectivity in HEK293T cells compared to AAV13,while AAV13-587-7m8 and AAV13-585-7m8 showed enhanced cNS infection capabilities in c57BL/6 mice,with AAV13-587-7m8 infection retaining a limited spread *** modified AAV13 variants hold promising potential for applications in gene therapy and neuroscience research.

关键词： Adeno-associated virus 13 AAV13-YF AAV13-587-7m8 AAV13-585-7m8 transduction efficiency

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co-assembly of chiral copper(I) complexes and achiral polymer for enhanced circularly polarized luminescence

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Science china chemistry 2024年

作者： Ting Liu Muxin Yu Yangxingyu Ye Yunfang Zhao Zhijia Li Zhiyuan Wu Feilong Jiang lian.chen Maochun Hong State Key Laboratory of Structural chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences (CAS) University of chinese Academy of Sciences Organic Optoelectronics Engineering Research center of Fujian's Universities College of Electronics and Information ScienceFujian Jiangxia University

circularly polarized luminescence（cPL） has attracted growing attention for their promising applications in chiral functional devices. Achieving cPL materials with both high luminescence dissymmetry factors(glum) and emission efficiency is attractive but remains great challenges. In this study, a pair of chiral cu（I） complexes named R/S-cuI with c2symmetry were synthesized,exhibiting no emission in solution and weak cPL with glum= ± 3.3×10-3in crystalline state. Transparent chiral films（R/S-cuIfilm） were developed through the co-assembly of R/S-cuI and achiral polymer PMMA. The films show bright green luminescence with the quantum yields about 200 times higher than those in crystalline state. Meanwhile, the maximum |glum| value is also amplified by approximately 2.5 times, reaching to 8.7×10-3. Mechanism investigation suggests that the notable enhancement of luminescence efficiency can be ascribed to the restriction of the intramolecular motions and the elimination of the oxygen quenching effect, while the improvement in glumvalues may be explained by the chirality transfer from the axially chiral molecule R/S-cuI to the achiral polymer PMMA. Furthermore, R/S-cuI-film were used for advanced information encryption applications based on its cPL characteristics. This work may provide new inspirations for the construction of cPL-active films with high performance, thereby expediting their further development.

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Spontaneous unidirectional rotation of a symmetric gear driven by spherical active particles

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National Science Open 2024年第4期3卷 41-53页

作者： chao Wang Wenchao lian.Huishu Li Wende Tian Kang chen center for Soft condensed Matter Physics & Interdisciplinary Research School of Physical Science and Technology Soochow University School of Physics and Electronic Engineering Linyi University

Time reversal asymmetry and spatial anisotropy are considered two prerequisites for Brownian ratchet. An intriguing realization can be achieved by placing an asymmetric gear in the suspension of motile rod-like bacteria. Usually,alignment interactions caused by anisotropic collisions or hydrodynamics would boost the ratchet effect. Here, we are concerned with a perfectly isotropic system, i.e., symmetric gear immersed in a bath of spherical active Brownian particles. We find that, under certain conditions, kinetic symmetry-breaking arises spontaneously, i.e., the symmetric gear keeps rotating in one direction. Unexpectedly, such ratchet phenomenon does not rely on the direct many-particle interactions and moreover the introduction of alignment interaction would counterintuitively prevent it from happening! Further investigation reveals that such spontaneous symmetry-breaking phenomenon shares similarities with the equilibrium phase transition of the Ising *** results provide new insights and enhance our understanding of the fundamental aspects of active ratchet phenomena.

关键词： ratchet effect spontaneous symmetry breaking active brownian particles ising model hysteresis

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Temperate Stutzerimonas Phage Encoding Toxin-Antitoxin System Genes Represents a Novel Genus

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Journal of Ocean University of china 2024年第4期23卷 1087-1101页

作者： ZHANG Hong GUO Ruizhe GAO chen ZHENG Kaiyang XIONG Yao DONG Yue LIU Yundan WANG Ziyue cHEN Ying WANG Hongmin SHAO Hongbing SUNG Yeong Yik MOK Wen Jye WONG Li lian.McMINN Andrew WANG Min lian. Yantao college of Marine Life Sciences Institute of Evolution and Marine BiodiversityMOE Laboratory of Evolution and Marine BiodiversityFrontiers Science Center for Deep Ocean Multispheres and Earth SystemCenter for Ocean Carbon NeutralityOcean University of ChinaQingdao 266003China UMT-OUc Joint center for Marine Studies Qingdao 266003China Institute of Marine Biotechnology Universiti Malaysia Terengganu21030 Kuala TerengganuMalaysia Institute for Marine and Antarctic Studies University of TasmaniaHobartTAS 7001Australia Haide college Ocean University of ChinaQingdao 266100China The Affiliated Hospital of Qingdao University Qingdao 266001China

Stutzerimonas have been extensively studied due to their remarkable metabolic and physiological ***,research on its phages is currently *** this study,we isolated a novel double-stranded DNA(dsDNA)phage,vB_SstM-PG1,from the marine environment that infects Stutzerimonas stutzeri *** dsDNA genome is 37204 bp long with a G/c content of 64.14%and encodes 54 open reading *** phage possesses a tail packaging structure that is different from known Stutzerimonas stutzeri phages and exhibits structural protein characteristics similar to those of temperate *** addition,two genes of toxin-antitoxin system,including YdaS_antitoxin and HEPN_SAV_6107,were found in the vB_SstM-PG1 genome and play important roles in regulating host growth and *** phylogenetic tree and comparative genomic analysis,it has been determined that vB_SstM-PG1 is not closely related to any phages previously identified in the GenBank ***,it has a connection with enigmatic,uncultured ***,the vB_SstM-PG1 virus exhibits an average nucleotide identity of over 70%with six uncultivated viruses identified in the IMG/VR v4 *** significant finding has resulted in the identification of a novel viral genus known as Metabovirus.

关键词： Stutzerimonas vB_SstM-PG1 Metabovirus temperate phage genomic and phylogenetic analysis

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Lipid nanoparticles deliver mRNA to the blood-brain barrier

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Nano Research 2024年第10期17卷 9126-9134页

作者： Yanina Kuzminich Avraham Shakked Randi calkins Sebastian Rudden camille Jones Jessie Doan Bora Jang Elisa Schrader Echeverri Ryan Zenhausern Liming lian.David Loughrey Hannah E.Peck Rachelle Wiese Dorothy Koveal Philip J.Santangelo James E.Dahlman George c.Woodruff School of Mechanical Engineering Georgia Institute of TechnologyAtlantaGA 30332USA Parker H.Petit Institute for Bioengineering and Biosciences Georgia Institute of TechnologyAtlantaGA 30332USA Wallace H.coulter Department of Biomedical Engineering Emory University School of Medicine and Georgia Institute of TechnologyAtlantaGA 30332USA

Lipid nanoparticles(LNPs)have delivered RNA to hepatocytes in patients after intravenous *** clinical data support efforts to design LNPs that transfect cells in the central nervous system(cNS).However,delivery to the cNS has been difficult,in large part because quantifying on-target delivery alongside common off-target cell types in adult mice remains *** we report methods to isolate different cell types from the cNS,and subsequently present mRNA delivery readouts using a liver-detargeted *** data suggest that LNPs without targeting ligands can transfect cerebral endothelial cells in mice after intravenous *** the difficulty of crossing the blood-brain barrier,they also underscore the value of quantifying delivery in the cNS with cell-type resolution instead of whole-tissue resolution.

关键词： lipid nanoparticle mRNA nanomedicine central nervous system blood-brain barrier

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初中数学“情境-问题-思维”教学模式建构

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教学与管理 2024年第1期 41-45页

作者：胡连成丰县梁寨镇梁寨初级中学江苏徐州221700

数学教学是指向思维发展的教学,而“情境-问题-思维”教学是实现这一旨归的重要路径:结合学生学习最近发展区,设计指向数学本质、兼具“真、趣、美、简”的问题情境,引发认知冲突,生成核心问题;基于相应数学思维的指导,通过问题变式形... 详细信息

数学教学是指向思维发展的教学,而“情境-问题-思维”教学是实现这一旨归的重要路径:结合学生学习最近发展区,设计指向数学本质、兼具“真、趣、美、简”的问题情境,引发认知冲突,生成核心问题;基于相应数学思维的指导,通过问题变式形成问题链,引领学生思维活动;通过思维定向、内化与外显等诸环节,在发展数学思维的同时实现一般性思维策略的提升。

关键词：情境设计问题变式问题链理性思维初中数学

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基于GPU加速的投影后变分壳模型计算

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原子能科学技术 2024年第2期58卷 272-278页

作者：陆晓连占江高早春中国原子能科学研究院核物理研究所北京102413

为进一步拓展投影后变分(VAP)壳模型计算应用核区范围,需提升VAP的计算效率。为此,利用OpenAcc并行编程指令,首次将VAP程序从传统的cPU平台移植到了高性能GPU计算平台上。在角动量投影的每个积分格点上实现了数目庞大的各独立转动矩阵元... 详细信息

为进一步拓展投影后变分(VAP)壳模型计算应用核区范围,需提升VAP的计算效率。为此,利用OpenAcc并行编程指令,首次将VAP程序从传统的cPU平台移植到了高性能GPU计算平台上。在角动量投影的每个积分格点上实现了数目庞大的各独立转动矩阵元的GPU并行化计算。经验证,采用GPU加速后的VAP程序计算得到的结果与原来的OpenMP并行化程序计算得到的结果完全相同,而计算效率得到了数倍的提升。借助于GPU加速技术,首次计算了变形重核^(178)Hf的基带能谱,打开了VAP壳模型方法应用于变形稀土重核之门。

关键词：壳模型投影后变分 GPU OpenAcc

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学校时间如何撬动教育质量:美国学校时间改革的经验

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全球教育展望 2024年第1期53卷 149-160页

作者：白倩连志鑫福建师范大学教育学院福州350007

在传统学校时空框架与教育改革的矛盾愈发凸显之际,美国学校时间改革提供了值得借鉴的经验。美国学校时间改革以提高教育质量和扩大学校教育公共价值为目的,围绕数量革命和质量革命展开,最终落脚于支持持续深度学习和满足个性化学习需... 详细信息

在传统学校时空框架与教育改革的矛盾愈发凸显之际,美国学校时间改革提供了值得借鉴的经验。美国学校时间改革以提高教育质量和扩大学校教育公共价值为目的,围绕数量革命和质量革命展开,最终落脚于支持持续深度学习和满足个性化学习需求。一系列改革措施促进美国的时间观念发生了根本性转变。学校时间改革的结果似乎表明,在大多数情况下改良时间结构比延长时间数量更有利于提高教育质量,并且只有当学校时间改革与课程、教学法、教师和评价方式等改革相联系时,真正的教育改革才会发生。

关键词：学校时间改革教育质量教育改革

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Three-dimensional MXene/carbon nanotube composite electrodes in flexible 64-channel arrays for noninvasive electromyography signal acquisition

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Science china Materials 2024年第9期67卷 2977-2984页

作者： lian.cheng Aiying Guo Jun Li Mengjiao Li Qiang Lei Wen Xu Xiaolin Guo Jianhua Zhang School of Microelectronics Shanghai UniversityShanghai201800China Key Laboratory of Advanced Display and System Applications Ministry of EducationShanghai UniversityShanghai200072China

Non-invasive surface electromyography(sEMG)electrodes have vast potential in fields such as healthcare,human-computer interaction,and entertainment,providing diverse information related to electromyographic ***-invasive sEMG electrodes reduce user risks but gather sEMG signals of lower quality compared to invasive ***,various advanced electrode materials have been developed for detecting physiological electrical signals,but the majority of them are single channel ***,we report 64-channel three-dimensional(3D)Ti_(3)c_(2)MXene/cNT composite electrodes fabricated using bonding-driven self-assembly *** electrodes are characterized by low skin-electrode contact impedance and a high signal-to-noise ratio(SNR)for collection of EMG *** electrode arrays exhibit remarkable flexibility,conforming seamlessly to the skin’s ***,the skin-electrode contact impedance of 3D Ti_(3)c_(2)MXene/cNT electrodes decreases by 10-fold compared to Ag/Agcl gel electrodes at a frequency of 100 ***,when collecting sEMG signals from the arm,the prepared Ti_(3)c_(2)MXene/cNT electrodes exhibit lower baseline noise and higher SNR compared to Ag/Agcl gel ***,Ti_(3)c_(2)MXene/cNT electrodes can collect sEMG signals of different hand gestures,while maintaining a high SNR(∼25 dB).By combining machine learning,sEMG signals from different gestures can be identified with a recognition rate exceeding 90%.The exceptional performance and scalability of these 3D Ti_(3)c_(2)MXene/cNT electrodes indicate a promising future for shaping electronic skin and wearable device technologies.

关键词： electrodes surface electromyography skin-contact impedance Ti_(3)c_(2)MXenes cNTs

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