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Efficient Polytelluride Anchoring for Ultralong-Life Potassium Storage: Combined Physical Barrier and Chemisorption in nanogrid-in-nanofiber

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nano-Micro Letters 2024年第4期16卷 364-378页

作者： Qinghua Li Dandan Yu jian Peng Wei Zhang jianlian Huang Zhix.n Liang Junling Wang Zeyu Lin Shiyun xiong Jiazhao Wang Shaoming Huang Guangzhou Key Laboratory of Low‑Dimensional Materials and Energy Storage Devices School of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006People’s Republic of China College of Materials and Chemistry China Jiliang UniversityHangzhou 310018People’s Republic of China Institute for Superconducting and Electronic Materials Australian Institute for Innovative MaterialsUniversity of WollongongInnovation CampusSquires WayNorth WollongongNSW 2522Australia

Metal tellurides(MTes) are highly attractive as promising anodes for high-performance potassium-ion batteries. The capacity attenuation of most reported MTe anodes is attributed to their poor electrical conductivity and large volume variation. The evolution mechanisms, dissolution properties, and corresponding manipulation strategies of intermediates(K-polytellurides, K-pTe_(x)) are rarely mentioned. Herein,we propose a novel structural engineering strategy to confine ultrafine CoTe_(2) nanodots in hierarchical nanogrid-in-nanofiber carbon substrates(CoTe_(2)@nC@nSPCnFs) for smooth immobilization of K-pTe_(x) and highly reversible conversion of CoTe_(2) by manipulating the intense electrochemical reaction process. Various in situ/ex situ techniques and density functional theory calculations have been performed to clarify the formation, transformation, and dissolution of K-pTe_(x)(K_(5)Te_(3) and K_(2)Te), as well as verifying the robust physical barrier and the strong chemisorption of K_(5)Te_(3) and K_(2)Te on S, n co-doped dual-type carbon substrates. Additionally, the hierarchical nanogrid-in-nanofiber nanostructure increases the chemical anchoring sites for K-pTe_(x), provides sufficient volume buffer space, and constructs highly interconnected conductive microcircuits, further propelling the battery reaction to new heights(3500 cycles at 2.0 A g^(-1)). Furthermore, the full cells further demonstrate the potential for practical applications. This work provides new insights into manipulating K-pTe_(x) in the design of ultralong-cycling MTe anodes for advanced PIBs.

关键词： Polytelluride dissolution nanogrid-in-nanofiber structure Physicochemical adsorption Reaction mechanism Ultralonglife potassium storage

HZSM-5 zeolites undergoing the high-temperature process for boosting the bimolecular reaction in n-heptane catalytic cracking

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Chinese Journal of Chemical Engineering 2024年第2期66卷 136-144页

作者： Chenggong song Zhenzhou Ma xu Hou Hao Zhou Huimin Qiao Changchang Tian Li Yin Baitang Jin Enxian Yuan School of Chemical Engineering Changchun University of TechnologyChangchun130012China Department of Chemical and Biomolecular Engineering North Carolina State UniversityRaleighNC 27606USA School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou225009China

High-temperature treatment is key to the preparation of zeolite ***,the effects of hightemperature treatment on the property and performance of HZSM-5 zeolites were studied in this work.x-Ray diffraction,n2physisorption,27Al magic angle spinning nuclear magnetic resonance(MAS nMR),and temperature-programmed desorption of ammonia results indicated that the hightemperature treatment at 650℃ hardly affected the inherent crystal and texture of HZSM-5zeolites but facilitated the conversion of framework Al to extra-framework Al,reducing the acid site and enhancing the acid ***,the high-temperature treatment improved the performance of HZSM-5 zeolites in n-heptane catalytic cracking,promoting the conversion and light olefins yield while inhibiting coke *** on the kinetic and mechanism analysis,the improvement of HZSM-5 performance caused by high-temperature treatment has been attributed to the formation of extra-framework Al,which enhanced the acid strength,facilitated the bimolecular reaction,and promoted the entropy change to overcome a higher energy barrier in n-heptane catalytic cracking.

关键词： HZSM-5 n-Heptane Catalytic cracking High-temperature treatment Extra-framework Al

海南金鲳人工养殖群体遗传多样性与遗传结构的微卫星分析

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水生生物学报 2024年第9期48卷 1573-1580页

作者：袁鑫宋飞彪姚富城桂建芳骆剑申惠君大连海洋大学水产与生命学院大连116023 中国科学院水生生物研究所淡水生态与生物技术国家重点实验室水产品种创制与高效养殖重点实验室湖北洪山实验室中国科学院种子创新研究院武汉430072 海南大学海洋生物与水产学院海口570228 海南大学三亚南繁研究院三亚572000 中国科学院大学北京100049

为评估海南省金鲳(Trachinotus blochii)人工养殖群体的种质资源背景及群体遗传结构,研究利用16对微卫星标记对采集自海南东方基地(晨海群体, CH)、陵水基地(青利群体, QL)、三亚基地(蓝粮群体, LL)共3家繁育公司的210尾金鲳进行了群体... 详细信息

为评估海南省金鲳(Trachinotus blochii)人工养殖群体的种质资源背景及群体遗传结构,研究利用16对微卫星标记对采集自海南东方基地(晨海群体, CH)、陵水基地(青利群体, QL)、三亚基地(蓝粮群体, LL)共3家繁育公司的210尾金鲳进行了群体遗传学分析。结果显示, 16个微卫星标记在3个群体中共检测到251个等位基因(n_(a)),平均观测杂合度(H_(o))、平均期望杂合度(He)及平均多态信息含量(PIC)分别为0.630、0.714及0.679,各位点的基因流(n_(m))平均为5.217。其中QL群体具有较高的遗传多态性。群体间的nei’s遗传分化系数(F_(st))介于0.017—0.038, AMOVA结果显示个体间的遗传变异占总变异的87%。STRUCTURE遗传聚类分析将3个群体分为两个亚群(K=2), QL与LL构成遗传亚群I,而CH构成遗传亚群II。UPGMA聚类分析结果与STRUCTURE基本一致,并进一步揭示了CH群体与QL、LL群体之间在遗传结构上的差异。综上, 3个不同来源的海南省金鲳养殖群体尚保持较高的遗传多样性,且存在一定的遗传结构差异。研究结果可为金鲳种质资源的评价与利用提供一定的数据支撑。

关键词：养殖群体微卫星标记遗传多样性遗传结构金鲳

Hydrochemistry predominantly shapes the unique nitrogen-fix.ng bacterial communities in Tibetan hot springs

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Journal of Earth Science 2024年

作者： Zhao-Qi song Li Wang Yaru Ma Dandan Deng Yang song Feng Liang xiangyu Guan Wen-Jun Li Hongchen jiang School of Ocean Sciences， China University of Geosciences Beijing State Key Laboratory of Biocontrol， Guangdong Key Laboratory of Plant Resources， School of Life Sciences， Sun Yat-sen University Engineering Technology Research Center of Biomass Degradation and Gasification， College of Biology and Food， Shangqiu normal University State Key Laboratory of Biogeology and Environmental Geology， China University of Geosciences

The Tibetan Plateau has a large number of hot springs with varying temperatures and hydrochemistry， high elevation， and limited nitrogenous nutrition. nitrogen-fix.ng bacteria (nFB) can fix.n2to form ammonia and thus provide bioavailable nitrogen. However， there is limited knowledge about the distribution of nFB and its influencing factors in Tibetan hot springs. Here， we measured hydrochemical variables of the hot springs with a wide temperature range (32–77 ℃) in the Qucai and Daggyai geothermal zones on the Tibetan Plateau and investigated the composition of nFB using high-throughput sequencing of 16S rRnA and nifH genes. The Cl-/SO42-ratio in Qucai hot springs was higher than that in Daggyai， indicating that Qucai and Daggyai hot springs were more affected by the supply of liquid and gaseous phases， respectively. The nFB communities consisted predominantly of nirtospirae， Chloroflexi， Deltaproteobacteria and an unidentified clade， with the last three acting as the main nFB with over 42% of the communities (the proportions are significantly larger than those found in hot springs of other geothermal regions). This demonstrates the uniqueness of nFB communities in Tibetan hot springs. nFB richness was limited by temperature in the studied Tibetan hot springs and was significantly lower than in low-elevation geothermal regions. The nFB community was predominantly affected by hydrochemistry， in contrast to the entire prokaryotic community， which was primarily influenced by temperature. This study expands our current understanding of nFB distribution and diversity as well as biogeochemical process in geothermal spring environments.

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Clinical analysis of patients with deep sternal wound infection-induced sepsis:a retrospective cohort study

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Emergency and Critical Care Medicine 2024年第2期4卷 67-73页

作者： Bin song Zhentian Cui Hongyan Ju Yue Sun Dandan Liu Guanggang Li Department of Critical Care 7th Medical Center of Chinese PLA General HospitalBeijingChina Department of Cardiac and Macrovascular Surgery 7th Medical Center of Chinese PLA General HospitalBeijingChina

Background:This study aimed to summarize the clinical characteristics of patients with deep sternal wound infection-induced sepsis after median sternotomy and improve the treatment outcomes of infection-related ***:A retrospective cohort study was conducted on 21 patients with deep sternal wound infection-induced sepsis after median sternotomy who were admitted to the Department of Critical *** clinical manifestations,laboratory test results,infection control,and organ and nutritional support of the patients were summarized,and the follow-up data were ***:The primary symptoms of deep sternal wound infection-induced sepsis included dyspnea,high fever,chills,and altered state of *** test results revealed increased inflammatory markers and decreased oxygenation *** and liver function injury were observed in 8 and 4 patients,respectively;18 and 12 patients demonstrated elevated D-dimer and n-terminal Pro B type natriuretic peptide levels,*** the 8 patients whose wound secretions tested positive for bacteria,Acinetobacter baumannii and Staphylococcus aureus infections were present in 6 and 2 patients,*** of the 6 patients whose blood cultures tested positive for bacteria demonstrated Candida albicans *** patients received ventilator-assisted ventilation and 2 patients received renal replacement *** all the 21 patients,17 were cured,2 died,and 2 were ***:Postmedian sternotomy sepsis attributed to a deep sternal wound infection usually results from a preexisting *** most prominent clinical manifestation is dyspnea,which is sometimes accompanied by the impairment of organ *** prevention,proper nutrition support,and maintenance of healthy organ function are the cornerstones for successful treatment outcomes.

关键词： Clinical analysis Deep sternal wound infection Sepsis

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基于异常保持的弱监督学习网络入侵检测模型

计算机工程与科学 2024年第5期46卷 801-809页

作者：谭郁松王伟蹇松雷易超雄国防科技大学计算机学院湖南长沙410073

网络入侵检测系统对维护网络安全至关重要,目前针对只有较少异常标记网络数据的入侵检测场景的研究较少。基于数据的异常保持性,设计了基于异常保持的弱监督学习网络入侵检测模型WIDS-APL,该检测模型包含数据转换层、表征学习层、转换... 详细信息

网络入侵检测系统对维护网络安全至关重要,目前针对只有较少异常标记网络数据的入侵检测场景的研究较少。基于数据的异常保持性,设计了基于异常保持的弱监督学习网络入侵检测模型WIDS-APL,该检测模型包含数据转换层、表征学习层、转换分类层和异常判别层4部分,利用一组可学习的编码器将样本映射到不同区域并压缩到超球体,利用异常样本的标签信息学习正常样本和异常样本的分类界限,得到样本的异常分数。在4个数据集上的测试结果表明了该模型的有效性和鲁棒性,相比4个主流算法,在AUC-ROC值上分别提升了4.80%,5.96%,1.58%和1.73%,在AUC-PR性能上分别提升了15.03%,2.95%,4.71%和9.23%。

关键词：网络入侵检测弱监督学习深度学习

Effect of heat treatment on microstructural evolution,mechanical properties and tribological properties of H13 steel prepared using selective laser melting

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Journal of Iron and Steel Research International 2024年第5期31卷 1246-1259页

作者： Li-xiong Han Yan Wang Shi-feng Liu Zhao-hui Zhang Wei Liu x.n Yang Dang-shen Ma jian Zhou Ying-kang Wei College of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an710055ShaanxiChina Zhejiang University City College Hangzhou310015ZhejiangChina China Iron and Steel Research Institute Group Co. Ltd.Beijing100081China

H13 tool steel was successfully prepared by selective laser melting(SLM)*** effects of heat treatment on the microstructure,mechanical properties,and tribological properties of SLMed H13 steel were *** heat treatment process involved a solution treatment and a double aging treatment of the deposited H13 tool steel prepared by *** aim is to optimize the microstructure and mechanical properties of SLMed H13 *** to the rapid heating and cooling effects of SLM,carbide precipitation in the deposited H13 steel was not uniform and residual stresses were *** purpose of the solution treatment is to dissolve the solution at a high temperature to eliminate the residual stresses and defects introduced by the SLM-forming *** solution treatment and first aging treatment produced the precipitation of small carbides at the grain boundaries and inside the crystals,which increased the hardness of SLMed H13 *** hardness increased from 538±4.0 HV of the as-deposited sample to 548±5.8 HV of samples after the first aging ***,the ultimate tensile strength and the elongation at break decreased from 1882 MPa and 11.5%in the as-deposited sample to 1697 MPa and 7.9%in those after the first aging treatment,***,the friction coefficient and wear rate in the as-deposited sample decreased from 0.5160 and 2.36×10^(–6)mm^(−3)n^(−1)m^(−1)to 0.4244 and 1.04×10^(–6)mm^(−3)n^(−1)m^(−1),***,the distribution of carbides inside the crystals was not *** second aging treatment adjusted the morphology of carbide precipitation and made it more uniform,but the precipitation of carbides grew and settled at the bottom of the grain *** hardness decreased to 533±6.7 HV compared with that with the first aging treatment,but the ultimate tensile strength and plasticity reached a balance(1807 MPa,14.05%).Accordingly,the friction coefficient and wear rate also showed a stable and decreasin

关键词： Selective laser melting H13 steel Solution aging Double aging Friction and wear Retained austenite

RsaL is a self-regulatory switch that controls alternative biosynthesis of two AHL-type quorum sensing signals in Pseudomonas aeruginosa PA1201

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mLife 2024年第1期3卷 74-86页

作者： Ya-Wen He Zi-Jing Jin Ying Cui Kai song Bo Chen Lian Zhou State Key Laboratory of Microbial Metabolism Joint International Research Laboratory of Metabolic and Developmental SciencesSJTU-NLBP Joint R&D Centre for Biopesticides and BiofertilizersSchool of Life Sciences and BiotechnologyShanghai Jiao Tong UniversityShanghaiChina Zhiyuan Innovative Research Centre Student Innovation CentreZhiyuan CollegeShanghai Jiao Tong UniversityShanghaiChina

Pseudomonas aeruginosa is a ubiquitous and metabolically versatile microorganism naturally found in soil and *** is also an opportunistic pathogen in plants,insects,animals,and *** response to increasing cell density,*** uses two acylhomoserine lactone(AHL)quorum-sensing(QS)signals(i.e.,n-3-oxo-dodecanoyl homoserine lactone[3-oxo-C12-HSL]and nbutanoyl-homoserine lactone[C4-HsL]),which regulate the expression of hundreds of ***,how the biosynthesis of these two QS signals is coordinated remains *** studied the regulation of these two QS signals in the rhizosphere strain ***1201 sequentially produced 3-oxo-C12-HSL and C4-HSL at the early and late growth stages,*** highest 3-oxo-C12-HSL-dependent elastase activity was observed at the early stage,while the highest C4-HSL-dependent rhamnolipid production was observed at the late *** atypical regulator RsaL played a pivotal role in coordinating 3-oxo-C12-HSL and C4-HSL biosynthesis and QS-associated *** repressed las/transcription by binding the-10 and-35 boxes of the lasl *** contrast,RsaL activated rhll transcription by binding the region encoding the 5'-untranslated region of the rhll ***,RsaL repressed its own expression by binding a nucleotide motif located in the-35 box of the rsaL ***,RsaL acts as a molecular switch that coordinates the sequential biosynthesis of AHL QS signals and differential virulence in ***,C4-HSL activation by RsaL was independent of the Las and Pseudomonas quinolone signal(PQS)QS signaling ***,we propose a new model of the QS regulatory network in PA1201,in which RsaL represents a superior player acting at the top of the hierarchy.

关键词： n-3-oxo-dodecanoyl homoserine lactone n-butanoyl-homoserine lactone Pseudomonas aeruginosa quorum sensing RsaL

Dinitrophenyl-oxadiazole compounds:Design strategy,synthesis,and properties of a series of new melt-cast explosives

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Defence Technology（防务技术） 2024年第5期35卷 100-107页

作者： Bao-long Kuang Ting-wei Wang Cong Li Mou Sun Qamar-un-nisa Tariq Chao Zhang Zhi-ming xie Zu-jia Lu jian-guo Zhang State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing100081China China Wuzhou Engineering Group CO. LTD.Beijing 100053China

Melt-cast explosives are the most widely used energetic materials in military composite explosives,researchers have been unremittingly exploring high-energy and insensitive melt-cast *** this work,a series of dinitrophenyl-oxadiazole compounds were designed and *** compounds have an ideal low melting point(80-97℃),good detonation performance(detonation velocity D=6455-6971 m/s,detonation pressure P=18-19 GPa)and extreme insensitive nature(impact sensitivity≥60 J,friction sensitivity>360 n).All these compounds were well characterized by nuclear magnetic resonance,fourier transform infrared spectroscopy,elemental *** 2,3 were unambiguously confirmed by x-ray single crystal diffraction *** a result,their overall properties are superior to traditional melt-cast explosives trinitrotoluene(TnT)and dinitroanisole(DnAn)which may have excellent potential applications in insensitive melt-cast explosives.

关键词： Dinitrophenyl-oxadiazole Melt-cast explosive Low sensitivity