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Highly uniform Co-Cu bimetallic sulfides for rechargeable alkaline aqueous zinc batteries

Chinese Chemical Letters 2024年第2期35卷 521-526页

作者： Xiaofang Bai yuwei Zhao Mangwei Cui Tianshuo Guo Zijie Tang Chuan Li Heng Gao Shuo Yang Lingzhi Zhao Chunyi Zhi Hongfei Li Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Songshan Lake Materials Laboratory Dongguan 523808China Department of Materials Science and Engineering City University of Hong KongHong KongChina International Centre for Quantum and Molecular Structures Department of PhysicsShanghai UniversityShanghai 200444China Guangdong Provincial Engineering Technology Research Center for Low Carbon and Advanced Energy Materials Institute of Semiconductor Science and TechnologySouth China Normal UniversityGuangzhou 510631China

Rechargeable alkaline aqueous zinc batteries(RAZBs)have attracted increasing ***,most RAZBs are hindered by the limited availability of cathode *** practical electrochemical performance of most cathode materials is lower than the theoretical value due to their poor electrical conductivity and low utilization *** this work,we develop a facile hydrothermal procedure to prepare highly uniform bimetallic sulfides as novel cathode materials for ***-cobalt binary metallic oxides materials possess higher conductivity and larger capacity compared with their mono-metal oxides compounds due to bimetallic synergistic effects and multiple oxidation ***,bimetallic sulfide compounds have smaller bond energy and longer bond length than their oxides,leading to less structural damage,faster kinetics of electrochemical reactions,and better *** as-prepared Co-Cu bimetallic sulfides show enhanced electrochemical performance due to various valences of Co and Cu as well as the existence of *** a result,aqueous Zn/CuCo_(2)S_(4) battery shows a high specific capacity of 117.4 mAh/g at 4 A/g and a good cycle life of over 8000 *** on PANa hydrogel electrolytes,a flexible Zn/CuCo_(2)S_(4) battery demonstrates excellent cycling *** battery can also meet the requirements of electronic devices with different shapes and performs well in extreme environments,such as freezing,drilling,and *** work opens new avenues to obtain high-rate and long-life cathode materials for RAZBs by utilizing the synergistic effects of bimetallic sulfides and provides a new platform for flexible energy storage devices.

关键词： Aqueous zinc batteries Bimetallic sulfides Cathode materials Rate performance Cycling stability

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Inhibition mechanisms of CRISPR-Cas9 by AcrI IA25.1 and AcrI IA32

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Science China Life Sciences 2024年

作者： Jianlin Zheng yuwei Zhu Tengjin Huang Wenbo Gao Jiale He Zhiwei Huang HIT Center for Life Sciences School of Life Science and Technology Harbin Institute of Technology Westlake Center for Genome Editing Westlake Laboratory of Life Sciences and Biomedicine School of Life Sciences Westlake University

In the ongoing arms race between bacteria and bacteriophages, bacteriophages have evolved anti-CRISPR proteins to counteract bacterial CRISPR-Cas systems. Recently, AcrIIA25.1 and AcrIIA32 have been found to effectively inhibit the activity of SpyCas9 both in bacterial and human cells. However, their molecular mechanisms remain elusive. Here, we report the cryo-electron microscopy structures of ternary complexes formed by AcrIIA25.1 and AcrIIA32 bound to SpyCas9-sgRNA. Using structural analysis and biochemical experiments, we revealed that AcrIIA25.1 and AcrIIA32 recognize a novel, previously-unidentified anti-CRISPR binding site on SpyCas9. We found that both AcrIIA25.1 and AcrIIA32 directly interact with the WED domain, where they spatially obstruct conformational changes of the WED and PI domains, thereby inhibiting SpyCas9 from recognizing protospacer adjacent motif(PAM) and unwinding double-stranded DNA. In addition,they may inhibit nuclease activity by blocking the dynamic conformational changes of the SpyCas9 surveillance complex. In summary, our data elucidate the inhibition mechanisms of two new anti-CRISPR proteins, provide new strategies for the modulation of SpyCas9 activity,and expand our understanding of the diversity of anti-CRISPR protein inhibition mechanisms.

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A novel semi-dominant allele of the transmembrane NAC transcription factor ZmNTL2 reduces the size of multiple maize organs

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The Crop Journal 2024年第3期12卷 676-687页

作者： Chuan Li Yun Bai yuwei Hou Siyu Wang Yue Xin Tao Yu Jing Wang Xiaowei Liu Hongyang Yi Chao Xia Hai Lan Moju Cao State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China Maize Research InstituteSichuan Agricultural UniversityChengdu 611130SichuanChina Jilin Engineering Research Center for Crop Biotechnology Breeding College of Plant ScienceJilin UniversityChangchun 130012JilinChina

Maize plant architecture influences planting density and,in turn,grain *** of the plant architecture-related traits can be described as organ *** describe a miniature maize mutant,Tiny plant 4(Tip4),which exhibits reduced size of multiple organs and exhibits a semi-dominant monofactorial inheritance *** cloning confirmed that a 4-bp deletion in the NAC TF with transmembrane motif 1-Like(NTL)gene ZmNTL2,denoted as ZmNTL2^(Δ),confers the Tip4 ***-PCR showed that ZmNTL2 was expressed in all tested ***2 functions as a transcriptional activator and is located in both the nucleus and *** mutation does not affect the mRNA abundance of ZmNTL2 locus,but it does result in the loss of transmembrane domain and confines the ZmNTL2^(Δ)protein to the *** out ZmNTL2 has no effect on maize organ size development,indicating that the 4-bp deletion might be a gain-of-function mutation in organ size *** transcriptome sequencing with cytokinin and auxin content determination suggests that the decreased organ size may be possibly mediated by changes in hormone homeostasis.

关键词： Organ size c-ray mutagenesis Membrane-bound NAC TF Hormone homeostasis Maize

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Robust,self-adhesive,and low-contact impedance polyvinyl alcohol/polyacrylamide dual-network hydrogel semidry electrode for biopotential signal acquisition

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SmartMat 2024年第2期5卷 67-82页

作者： Guangli Li Ying Liu yuwei Chen Yonghui Xia Xiaoman Qi Xuan Wan Yuan Jin Jun Liu Quanguo He Kanghua Li Jianxin Tang Hunan Key Laboratory of Biomedical Nanomaterials and Devices College of Life Sciences and ChemistryHunan University of TechnologyZhuzhouChina Department of Neurology Zhuzhou People's HospitalZhuzhouChina Zhuzhou Institute for Food and Drug Control ZhuzhouChina

Herein,we fabricated a flexible semidry electrode with excellent mechanical performance,satisfactory self-adhesiveness,and low-contact impedance using physical/chemical crosslinked polyvinyl alcohol/polyacrylamide dual-network hydrogels(PVA/PAM DNHs)as an efficient saline *** resultant PVA/PAM DNHs showed admirable adhesive and compliance to the hairy scalp,facilitating the establishment of a robust electrode/skin interface for biopotential signal ***,the PVA/PAM DNHs steadily released trace saline onto the scalp to achieve the minimized potential drift(1.47±0.39 mV/min)and low electrode–scalp impedance(18.2±8.9 kΩ@10 Hz).More importantly,the application feasibility of real-world brain−computer interfaces(BCIs)was preliminarily validated by 10 participants using two classic BCI *** mean temporal cross-correlation coefficients between the semidry and wet electrodes in the eyes open/closed and the N200 speller paradigms are 0.919±0.054 and 0.912±0.050,*** electrodes demonstrate anticipated neuroelectrophysiological responses with similar *** semidry electrode could also effectively capture robust P-QRS-T peaks during electrocardiogram *** their outstanding advantages of fast setup,user-friendliness,and robust signals,the proposed PVA/PAM DNH-based electrode is a promising alternative to wet electrodes in biopotential signal acquisition.

关键词： brain-computer interface dual-network hydrogel electrocardiogram signals electroencephalography signals semidry electrode

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Building Metaverse Digital Humanities Labs:Strategies and Challenges in Higher Education

IJLAI Transactions on Science and Engineering

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IJLAI Transactions on Science and Engineering 2024年第2期2卷 36-44页

作者： Xiaoxi Tian yuwei Liu Kuangyi He Shenyang Jianzhu University Shenyang 110159China

The integration of metaverse technologies within the academic sphere is redefining the landscape of digital humanities research and *** study examines the current state and future prospects of metaverse digital humanities laboratories in higher education institutions,highlighting their importance and the challenges they *** research underscores the significance of these laboratories in fostering interdisciplinary collaboration,enhancing educational experiences,and promoting cultural preservation through digital *** metaverse digital humanities laboratories are seen as crucial platforms for innovation,providing immersive environments that facilitate the application of advanced digital tools in humanities *** study identifies key challenges,including the need for robust hardware infrastructure,the complexity of technology integration,data management concerns,and the necessity for ethical frameworks that address privacy and intellectual property *** also emphasizes the importance of user experience,interdisciplinary collaboration,and the development of a comprehensive talent cultivation system that aligns with the digital *** for the construction and development of these laboratories are proposed,such as accelerating metaverse infrastructure development,promoting the transformation of traditional digital humanities laboratories,and establishing mechanisms for data protection and resource *** research also calls for the enhancement of user experiences through personalized services and the cultivation of talent through interdisciplinary educational *** conclusion,the metaverse digital humanities laboratories represent a strategic frontier in academic innovation,offering transformative potential for research and education in the *** study provides a roadmap for the development of these laboratories,suggesting a comprehensive approach that addresses technological,pedagogical,ethical,and finan

关键词： Metaverse Digital humanities Higher education Virtual reality Augmented reality Educational innovation Cultural preservation

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Generic Interpretable Reaction Condition Predictions with Open Reaction Condition Datasets and Unsupervised Learning of Reaction Center

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Research 2024年第2期2023卷 773-794页

作者： Xiaorui Wang Chang-Yu Hsieh Xiaodan Yin Jike Wang Yuquan Li Yafeng Deng Dejun Jiang Zhenxing Wu Hongyan Du Hongming Chen Yun Li Huanxiang Liu yuwei Wang Pei Luo Tingjun Hou Xiaojun Yao Dr.Neher's Biophysics Laboratory for lnnovative Drug Discovery State Key Laboratory of Quality Research in Chinese MedicineMacao Institute for Applied Research in Medicine and HealthMacao University of Science and TechnologyMacao999078China innovation Institute for Artificial Intelligence in Medicine of Zhejiang University College of Pharmaceutical SciencesZhejiang UniversityHangzhou310058China Faculty of Applied Sciences Macao Polytechnic UniversityMacao999078China College of Chemistry and Chemical Engineering Lanzhou UniversityLanzhou730000China Carbon Silicon AI Technology Co. LtdHangzhouZhejiang 310018China Center of Chemistry and Chemical Biology Guangzhou Regenerative Medicine and Health Guangdong LaboratoryGuangzhou 510530China College of Pharmacy Shaanxi University of Chinese MedicineXianyangShaanxi712044China

Effective synthesis planning powered by deep learning(DL)can significantly accelerate the discovery of new drugs and ***,most DL-assisted synthesis planning methods offer either none or very limited capability to recommend suitable reaction conditions(RCs)for their reaction ***,the prediction of RCs with a DL framework is hindered by several factors,including:(a)lack of a standardized dataset for benchmarking,(b)lack of a general prediction model with powerful representation,and(c)lack of *** address these issues,we first created 2 standardized RC datasets covering a broad range of reaction classes and then proposed a powerful and interpretable Transformer-based RC predictor named *** careful design of the model architecture,pretraining method,and training strategy,Parrot improved the overall top-3 prediction accuracy on catalysis,solvents,and other reagents by as much as 13.44%,compared to the best previous model on a newly curated ***,the mean absolute error of the predicted temperatures was reduced by about 4℃.Furthermore,Parrot manifests strong generalization capacity with superior cross-chemical-space prediction *** analysis indicates that Parrot effectively captures crucial chemical information and exhibits a high level of interpretability in the prediction of *** proposed model Parrot exemplifies how modern neural network architecture when appropriately pretrained can be versatile in making reliable,generalizable,and interpretable recommendation for RCs even when the underlying training dataset may still be limited in diversity.

关键词： versatile absolute generalization

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Improving innovation and entrepreneurship education in higher institutions: the impact of "Mass Entrepreneurship and Innovation" education on undergraduates' entrepreneurial intentions

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教育技术与创新 2024年第1期6卷 10-26页

作者： ShaoYing Lu Sun Ye XiaoShu Xu yuwei Zhao Graduate School Stamford International UniversityThailand Centre for Portuguese Studies Macao Polytechnic UniversityMacao 不详

The exploration of the way"mass entrepreneurship and innovation"(MEI)education influences students'aspirations to become entrepreneurs has grown into an important area of analysis in studies related to higher *** research intends to examine the consequences of MEI education on students'tendency towards entrepreneurship,and to put forward methods for augmenting the teaching of innovation and entrepreneurship in private higher educational *** achieve this objective,questionnaires and semi-structured interviews were employed in the study,which involved a total of 197 students and five education *** statistical analysis of the questionnaire data revealed that MEI education was positively related to students'entrepreneurial intentions,and that both entrepreneurial experience and family entrepreneurial background played moderating roles in this *** interview findings indicated that private universities could enhance educational reforms by designing talent training programs,developing diversified curricula,and developing more professional entrepreneurial platforms to encourage students'entrepreneurial *** study offers fresh insights for improving and perfecting the mechanism of innovation and entrepreneurship education in private universities.

关键词： Private universities Mass Entrepreneurship and Innovation MEI education entrepreneurial intention

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卷弧翼弹箭气动外形滚转特性研究

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弹箭与制导学报 2015年第5期35卷 127-132页

作者：向玉伟李杰西北工业大学航空学院西安710072

针对某带卷弧翼的弹箭气动外形,文中利用CFD软件对其卷弧翼滚转特性进行了研究,分析了不同正斜置角及后缘凸面斜切凹槽对卷弧翼滚转特性的影响,结果表明:在卷弧翼上增加正斜置角及后缘凸面斜切凹槽对卷弧翼的滚转特性的影响显著,通过卷... 详细信息

针对某带卷弧翼的弹箭气动外形,文中利用CFD软件对其卷弧翼滚转特性进行了研究,分析了不同正斜置角及后缘凸面斜切凹槽对卷弧翼滚转特性的影响,结果表明:在卷弧翼上增加正斜置角及后缘凸面斜切凹槽对卷弧翼的滚转特性的影响显著,通过卷弧翼+正斜置角+后缘凸面斜切凹槽的组合设计,能够最终获得满足总体指标要求的滚转特性。

关键词：卷弧翼数值模拟旋转弹箭滚转特性风洞实验

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战略性矿产资源清单、供需形势与对策

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科技导报 2024年第5期42卷 26-37页

作者：李裕伟自然资源部咨询研究中心北京100035

阐述了战略性矿产的起源、发展、演变和现状;对比研究了战略性矿产的定义、种类及在经济安全和国防安全中的作用;有针对性地分析了当前战略性矿产的国际竞争、制约与反制约活动和中国面临的产业链供应链形势,并提出了政策建议。中国应... 详细信息

阐述了战略性矿产的起源、发展、演变和现状;对比研究了战略性矿产的定义、种类及在经济安全和国防安全中的作用;有针对性地分析了当前战略性矿产的国际竞争、制约与反制约活动和中国面临的产业链供应链形势,并提出了政策建议。中国应充分发挥现有的产业优势和市场优势,克服资源短板,加大政策调控,激发企业国际竞争力,重构产业链供应链,用好国内国外两种资源,为中国在世界新一轮经济发展中立于必胜之地提供充足、安全的战略性资源保障。

关键词：战略性矿产关键矿产大宗矿产短缺矿产产业链供应链矿产资源管理

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管路结构参数对液压管路振动特性的影响研究

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现代制造工程 2024年第2期 1-7页

作者：卢翔姚飞马语蔚高相国中国民航大学交通科学与工程学院天津300300 中国民航大学航空工程学院天津300300

为探究液压管路的结构参数对其振动特性的影响,建立了不同几何结构参数液压管路有限元模型,基于流固耦合研究了不同结构材料、不同弯曲半径以及不同弯曲内角对液压管路振动特性的影响。研究发现,在液压管路结构一定情况下,钛合金Ti-3Al-... 详细信息

为探究液压管路的结构参数对其振动特性的影响,建立了不同几何结构参数液压管路有限元模型,基于流固耦合研究了不同结构材料、不同弯曲半径以及不同弯曲内角对液压管路振动特性的影响。研究发现,在液压管路结构一定情况下,钛合金Ti-3Al-2.5V的固有频率最小,不锈钢1Cr18Ni9Ti的变形量最小;在固定液压管路总长的情况下,弯曲半径的增加会提升固有频率并会降低变形量,弯曲内角的增加会减小固有频率但会降低变形量;在固定直管段长度的情况下,弯曲半径的增加会导致固有频率减小并导致变形量增加,弯曲内角的增加会导致固有频率减小但会降低变形量。

关键词：液压管路结构参数振动特性固有频率有限元模型

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