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International Journal of Minerals,Metallurgy and Materials 2024年第5期31卷 887-898页

作者： Ting wang Zhangzhi Shi Hongyong Zhong Xiangmin Li Jinling Sun Wei Yin Xiaojing Ji Qiang wang Anqi Zhao luning wang School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China

Anterior cruciate ligament(ACL)injuries of the knee are one of the most common and serious athletic *** widely used cortical suspension fixation buttons for ligament reconstruction are permanent implants,particularly those made from conventional steel or titanium *** this study,a biodegradable Zn-0.45Mn-0.2Mg(ZMM42)alloy with the yield strength of 300.4 MPa and tensile strength of 329.8 MPa was prepared through hot *** use of zinc alloys in the preparation of cortical suspension fixation buttons was proposed for the first *** 35 d of immersion in simulated body fluids,the ZMM42 alloy fixation buttons were degraded at a rate of 44μm/a,and the fixation strength was retained(379.55 N)in the traction ***,the ZMM42 alloy fixation buttons exhibited an increase in MC3T3-E1 cell viability and high antibacterial activity against Escherichia coli and Staphylococcus *** results reveal the potential of biodegradable zinc alloys for use as ligament reconstruction materials and for developing diverse zinc alloy cortical suspension fixation devices.

关键词： anterior cruciate ligament reconstruction zinc alloy fixation buttons mechanical property corrosion behavior biocompatibility

Second phase refining induced optimization of Fe alloying in Zn:Significantly enhanced strengthening effect and corrosion uniformity

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International Journal of Minerals,Metallurgy and Materials 2022年第4期29卷 796-806页

作者： Zhangzhi Shi Changheng Li Meng Li Xiangmin Li luning wang Beijing Advanced Innovation Center for Materials Genome Engineering Key Laboratory for Advanced Materials Processing of Ministry of EducationBeijing Laboratory of Metallic Materials and Processing for Modern TransportationSchool of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China

Many non-toxic alloying elements,such as Fe,Ca,and Sr,have negligible solid solubilities in Zn matrix,leading to formation of coarse second phase *** exhibit low strengthening effects but highly detrimental to *** refining second phase is a common pursuit for Zn *** present paper takes Zn-0.3Fe alloy suffered from coarse FeZn_(13) second phase particles as a touchstone to testify microstructure refining effect through solidification with an accelerated speed and multi-pass ***_(13) particles are refined from 24 to 2μm,and Zn grains are refined to 5μ*** a result,the strengthening effect of Fe is enhanced significantly,with yield strength and the ultimate tensile strength of the alloy increased from 132 to 218 MPa and from 159 to 264 MPa,***,corrosion non-uniformity and penetration are much *** results show that microstructure refinement,especially on coarse intermetallic second phases,has a great potential to improve mechanical and degradation properties of biodegradable Zn alloys.

关键词： zinc alloys microstructure mechanical properties corrosion uniformity

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高校赋能科学教育的三维路径

中小学校长 2024年第6期 59-62页

作者：王鲁宁黄妙逢袁文霞北京科技大学北京科技大学自然科学基础实验中心双创分中心北京科技大学自然科学基础实验中心

基础教育是教育和人才培养的起点,也是中小学生科学兴趣培养、科学知识学习和科学思维养成的关键期,将中小学科技创新人才培养作为科技创新人才培养全链条的最前端,为广大中小学生提供优质的科学教育,是高等学校的重要职责。高等学校集... 详细信息

基础教育是教育和人才培养的起点,也是中小学生科学兴趣培养、科学知识学习和科学思维养成的关键期,将中小学科技创新人才培养作为科技创新人才培养全链条的最前端,为广大中小学生提供优质的科学教育,是高等学校的重要职责。高等学校集教育、科技创新和人才培养于一身,是实现上述发展格局最主要的载体。北京科技大学深入推进教育、科技、人才“三位一体”协同融合发展,主动与基础教育合作联动,从教育、科技和人才三个维度展开,探索科技创新人才的全链条培养模式,引领中小学科学教育的发展。

关键词：科学教育高校引领三位一体

孕产妇围生期抑郁动态特征与新生儿生长发育异常的相关性分析

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中国优生与遗传杂志 2024年第4期32卷 745-749页

作者：王鲁宁翟露露章春燕王海莲蔡晨杭州市临平区妇幼保健院浙江杭州311199

目的了解孕产妇围生期抑郁动态变化特征,分析其与新生儿生长发育异常的相关性。方法采用巢氏病例对照研究设计对2021年5月至2023年5月在临平区建卡和分娩的母婴于孕早期、孕中期、孕晚期和产后42天进行4次随访,利用爱丁堡产后抑郁量表(E... 详细信息

目的了解孕产妇围生期抑郁动态变化特征,分析其与新生儿生长发育异常的相关性。方法采用巢氏病例对照研究设计对2021年5月至2023年5月在临平区建卡和分娩的母婴于孕早期、孕中期、孕晚期和产后42天进行4次随访,利用爱丁堡产后抑郁量表(EPDS)和发育进程问卷系统调查母亲抑郁转归和子代生长发育状况,分析孕产期抑郁动态变化与新生儿生长发育情况的关联性。结果共招募210对母婴,孕早期、孕中期、孕晚期和产后抑郁检出率分别为39.52%、21.90%、15.71%、25.24%。异常组的孕产妇孕中期抑郁检出率高于正常组,差异有统计学意义(χ^(2)=4.29,P=0.04);孕中期EPDS量表评分高于正常组,差异有统计学意义(P=0.03)。广义估计方程分析结果显示,孕早期、孕中期、孕晚期和产后EPDS量表得分均与婴儿生长发育呈负相关(P=0.04)。结论孕早期、孕中期、孕晚期和产后抑郁症状对新生儿生长发育有负面影响,应在孕期及产后积极开展健康指导,降低母亲抑郁症状发生。

关键词：围生期抑郁抑郁动态特征抑郁动态变化生长发育异常妇幼保健

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MFC处理含砷废水研究进展

辽宁化工 2024年第7期53卷 1065-1067,1074页

作者：张林芸王鲁宁姚淑华张学军郑阳沈阳化工大学环境与安全工程学院辽宁沈阳110142 沈阳中泽环境工程有限公司辽宁沈阳110142 沈阳化工大学理学院辽宁沈阳110142 不详

三价砷可以在微生物燃料电池的阳极中被氧化为五价砷,该技术具有成本低、效率高、无二次污染等优点,有希望成为三价砷污染废水处理的一种新方法。介绍了微生物燃料电池处理砷废水的机制,分析了电化学过程和微生物在砷废水处理中的协同作... 详细信息

三价砷可以在微生物燃料电池的阳极中被氧化为五价砷,该技术具有成本低、效率高、无二次污染等优点,有希望成为三价砷污染废水处理的一种新方法。介绍了微生物燃料电池处理砷废水的机制,分析了电化学过程和微生物在砷废水处理中的协同作用,提出了加强微生物燃料电池处理含砷废水效率和实际应用的可能途径。

关键词：微生物燃料电池电池阳极含砷废水 As(Ⅲ)

基于t检验的光伏电站中能效异常光伏组件识别研究

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太阳能 2024年第4期 101-107页

作者：王鲁宁王文彬姚洪鹏陆江高浩袁廷璧国电建投内蒙古能源有限公司鄂尔多斯017000 国家能源集团新能源技术研究院北京102200 华北电力大学(保定) 保定071000

由于目前光伏电站能效指标缺乏具体的应用方式,光伏组件发电效率优劣的界限模糊,且光伏电站在正常运行中光伏组件I-V特性曲线难以获取,导致目前识别异常光伏组件的方法难以应用到实际光伏电站中。基于此,利用光伏组件能效比服从正态分... 详细信息

由于目前光伏电站能效指标缺乏具体的应用方式,光伏组件发电效率优劣的界限模糊,且光伏电站在正常运行中光伏组件I-V特性曲线难以获取,导致目前识别异常光伏组件的方法难以应用到实际光伏电站中。基于此,利用光伏组件能效比服从正态分布的特点,提出了一种基于t检验的光伏电站中能效异常光伏组件的识别方法,对光伏组件实际能效比与理论能效比之差进行假设检验,并结合实际光伏电站进行实验验证。研究结果表明:该方法可以有效识别异常光伏组件,可为光伏电站的运维提供数据支持。

关键词：光伏组件光伏电站假设检验能效比 t检验统计学

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New Antibacterial Dihydropyrones Induced by Co-Culture of Penicillium crustosum PRB-2 and Penicillium citrinum HDN11-186

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Journal of Ocean University of China 2024年第1期23卷 216-220页

作者： YU Guihong ZHOU luning WU Guangwei LI Dehai Shandong Province Key Laboratory of Applied Mycology and Qingdao International Center on Microbes Utilizing BiogasSchool of Life SciencesQingdao Agricultural UniversityQingdao 266109China School of Medicine and Pharmacy and Sanya Oceanographic InstitutionOcean University of ChinaQingdao 266003China College of Chemical Engineering Nanjing Forestry UniversityNanjing 210037China Laboratory for Marine Drugs and Bioproducts Laoshan LaboratoryQingdao 266237China

Two new dihydropyrones,rhytismatones C(1)and D(2),and a known compound,penicillenol A1(3),were isolated from the co-culture broth of the deep-sea-derived fungus Penicillium crustosum PRB-2 and Suaeda salsa-derived endophytic fungus Peni-cillium citrinum *** structures were elucidated through comprehensive analysis of nuclear magnetic resonance(NMR)spectra and mass *** absolute configurations of new compounds were determined by calculating the electronic circular di-chroism(ECD)***-MS data showed that compounds 1–3 could only be detected in the media of co-culture,suggesting new biosynthetic pathways were activated in the co-cultured *** 1 showed obvious antibacterial activities against Pro-teus ***-1002 and Bacillus subtilis MMBC-1004 with minimum inhibitory concentration(MIC)both at 25μmolL^(-1).

关键词： co-culture Penicillium crustosum Penicillium citrinum dihydropyrones antibacterial activity

3D electromagnetic modelling for high-temperature superconducting dynamo flux pumps using T-A formulation

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High Voltage 2024年第2期9卷 367-379页

作者： luning Hao Fangliang Dong Jintao Hu Qi wang Haigening Wei Ismail Patel Adil Shah Yuyang Wu Tim Coombs Department of Engineering University of CambridgeCambridgeUK Plasma Science and Fusion Center Massachusetts Institute of TechnologyCambridgeMassachusettsUSA

A high-temperature superconducting(HTS)dynamo flux pump can inject DC currents into closed-loop HTS magnets without *** enables the realisation of current-lead-free or even through-wall charging systems for high-field applications such as nuclear magnetic resonance/magnetic resonance imaging(MRI)magnets,fusion reactors and *** have proposed many simulation models to understand the working principle of HTS dynamos,few of which are in 3D because of converging ***,the influences of many key 3D parameters in the HTS dynamo are scarcely *** authors propose an efficient 3D modelling method of the HTS dynamo based on the T-A *** rotating magnets are modelled by a ring-shaped permanent magnet with space-time-variant remanent flux density to avoid moving ***,together with the T-A formulation,makes the 3D model efficient and *** accuracy of the model is verified by the experimental instantaneous and time-integrated dynamic *** this model,the authors present systematic case studies to thoroughly explore the influences of the key parameters of a dynamo flux pump on the dynamic voltage and *** proposed modelling method and results could significantly benefit the design and optimisation of HTS dynamos for high-field magnets.

关键词： formulation magnets pump

Comparative analysis of DNA-SIP and magnetic-nanoparticle mediated isolation (MMI) on unraveling dimethoate degraders

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Frontiers of Environmental Science & Engineering 2024年第1期18卷 59-69页

作者： luning Lian Yi Xing Dayi Zhang Longfei Jiang Mengke Song Bo Jiang School of Energy and Environmental Engineering University of Science&Technology BeijingBeijing 100083China Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants University of Science&Technology BeijingBeijing 100083China National Environmental and Energy Science and Technology International Cooperation Base University of Science&Technology BeijingBeijing 100083China College of New Energy and Environment Jilin UniversityChangchun 130021China Guangzhou Institute of Geochemistry Chinese Academy of SciencesGuangzhou 510640China College of Natural Resources and Environment South China Agricultural UniversityGuangzhou 510642China National Engineering Laboratory for Site Remediation Technologies Beijing 100015China

Microorganisms are crucial in the bioremediation of organophosphorus pesticides. However, most functional microorganisms (> 99%) are yet to be cultivated. This study applied two cultivation-independent approaches, DNA-SIP and magnetic-nanoparticle mediated isolation (MMI), to identify the functional microorganisms in degrading dimethoate in agricultural soils. MMI identified five dimethoate degraders: Pseudomonas, Bacillus, Ramlibacter, Arthrobacter, and Rhodococcus, whereas DNA-SIP identified three dimethoate degraders: Ramlibacter, Arthrobacter, and Rhodococcus. Also, MMI showed higher resolution than DNA-SIP in identifying functional microorganisms. Two organic phosphohydrolase (OPH) genes: ophC2 and ophB, were involved in dimethoate metabolism, as revealed by DNA-SIP and MMI. The degradation products of dimethoate include omethoate, O,O,S-trimethyl thiophosphorothioate, N-methyl-2-sulfanylacetamide, O,O-diethyl S-hydrogen phosphorodithioate, O,O,O-trimethyl thiophosphate, O,O,S-trimethyl thiophosphorodithioate, and O,O,O-trimethyl phosphoric. This study emphasizes the feasibility of using SIP and MMI to explore the functional dimethoate degraders, expanding our knowledge of microbial resources with cultivation-independent approaches.

关键词： Stable isotope probing(SIP) Magnetic-nanoparticle mediated isolation(MMI) Dimethoate Biodegradation Cultivation-independent approach

Drug-nanoencapsulated PLGA microspheres prepared by emulsion electrospray with controlled release behavior

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Regenerative Biomaterials 2016年第5期3卷 309-317页

作者： Shenglian Yao Huiying Liu Shukui Yu Yuanyuan Li Xiumei wang luning wang School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Department of Oral and Maxillofacial Surgery School of StomatologyDalian Medical UniversityDalian 116044China Institute for Neuroscience Capital Medical UniversityBeijing 100069China

The development of modern therapeutics has raised the requirement for controlled drug delivery system which is able to efficiently encapsulate bioactive agents and achieve their release at a desired rate satisfying the need of the practical *** this study,two kind of aqueous model drugs with different molecule weight,Congo red and albumin from bovine serum(BSA)were nanoencapsulated in poly(DL-lactic-co-glycolic acid)(PLGA)microspheres by emulsion *** the preparation process,the aqueous phase of drugs was added into the PLGA chloroform solution to form the emulsion *** emulsion was then electrosprayed to fabricate drugnanoencapsulated PLGA *** morphology of the PLGA microspheres was affected by the volume ratio of aqueous drug phase and organic PLGA phase(V_(w)/V_(o))and the molecule weight of model *** laser scanning microcopy showed the nanodroplets of drug phase were scattered in the PLGA microspheres homogenously with different distribution patterns related to V_(w)/V_(o).With the increase of the volume ratio of aqueous drug phase,the number of nanodroplets increased forming continuous phase gradually that could accelerate drug release ***,BSA showed a slower release rate from PLGA microspheres comparing to Congo red,which indicated the drug release rate could be affected by not only V_(w)/V_(o)but also the molecule weight of model *** brief,the PLGA microspheres prepared using emulsion electrospray provided an efficient and simple systemto achieve controlled drug release at a desired rate satisfying the need of the practices.

关键词： PLGA microspheres drug nanoencapsulation emulsion electrospray controlled drug release